Top 32 Legacy Application Modernization Companies (2026)

Find application modernization companies for your migration task. Compare recorded source and target technologies, supplier type, team size, location, and public evidence. Use the filters to narrow the roster.

The 32 entries include 29 delivery firms and 3 products or platforms. The roster is alphabetical; “Top” in the title does not indicate a ranking or score.

Public evidence by migration task

We checked public sources for selected suppliers and migration tasks. Each starting system and target comes from the linked source. Open an entry to see the supplier’s responsibility, source dates, and limits. Products require an implementation team. Capability documentation describes supported work; a customer delivery record describes completed work.

Suppliers with public evidence by migration task
Migration taskSuppliers with linked evidence
Replatform or re-architect on AWS
  • 10Clouds · Delivery firm
    • On-premises applications (languages and frameworks unspecified) to AWS · Official capability documentation
Ruby/Rails upgrades
  • Arkency · Delivery firm
    • Ruby on Rails 5.2.6.2 on Ruby 2.6.9 (example plan) to Ruby on Rails 7.1.3.4 on Ruby 3.3.2 (example plan) · Official capability documentation
  • BigBinary · Delivery firm
    • Ruby on Rails applications (versions unspecified) to Latest Ruby on Rails version · Official capability documentation
  • FastRuby.io · Delivery firm
    • Ruby on Rails 5.0 to Ruby on Rails 5.1 · Supplier-reported case study
    • Ruby on Rails 7.0 to Ruby on Rails 8.1 · Supplier-reported case study
    • Ruby and Rails applications (versions unspecified) to Client-selected Ruby and Rails versions · Official capability documentation
  • Planet Argon · Delivery firm
    • Ruby on Rails 5.2 on Ruby 2.6 to Ruby on Rails 7.1 on Ruby 3.2 · Supplier-reported case study
    • Ruby on Rails applications across many versions to Supported Ruby on Rails versions · Official capability documentation
  • Reinteractive · Delivery firm
    • Ruby and Rails applications (all versions, per the supplier) to Latest Ruby and Rails versions · Official capability documentation
    • Three Field Catalog Web Portal applications on Ruby as old as 1.9 and Rails as old as 3.1 to Latest stable Ruby and Rails versions (not numbered on the page) · Supplier-reported case study
  • Saeloun · Delivery firm
    • Older Ruby and Rails versions (Rails 3 and later, per the page title) to Supported Ruby and Rails releases (up to Rails 8) · Official capability documentation
Java version upgrades
  • OpenRewrite · Product or platform
    • Java 8 to Java 17 · Official capability documentation
Rebuild legacy .NET application
  • Scalo · Delivery firm
    • Legacy legal-software product (technology not disclosed) to New version built with Angular and .NET on Microsoft Azure · Supplier-reported case study
Incremental .NET modernization
  • ScienceSoft · Delivery firm
    • Classic ASP and ASP.NET 4.5 module front ends; Salesforce-based back end to React module front ends; .NET and Azure microservices · Supplier-reported case study
Laravel development for legacy applications
  • Spatie · Delivery firm
    • Legacy web applications (starting stack unspecified) to Laravel · Official capability documentation
Monolith decomposition
  • Thoughtworks · Delivery firm
    • Monolithic mainframe issuer-processing platform to AWS-hosted microservices · Supplier-reported case study
Decommission legacy PHP monolith
  • Thoughtworks · Delivery firm
    • Legacy PHP 7 monolith approaching end of support to Modular microservices architecture on AWS · Supplier-reported case study
Convert legacy PHP to Laravel
  • Tighten · Delivery firm
    • Legacy PHP application to Laravel with Vue · Official capability documentation

Compare legacy application modernization companies

Filter by what a company migrates from, its modernization approach, supplier type, team size, or region. Listed alphabetically, never ranked, scored, or rated. We currently have no sponsors. Vendor inclusion, recommendations, and highlights are editorial decisions based on documented evidence.

The lists show recorded source and target technologies. They do not prove delivery of every combination. Follow the public evidence links to the checked claims below. “Public sources not reviewed here” means we have not checked those claims; it is not a judgment of the supplier’s performance.

Migrates from:
Approach:
Supplier type:
Team size:
Region:
Legacy Application Modernization company comparison: recorded source and target coverage, approach, supplier type, team size, region, public evidence kind, and internal relationship records
CompanyRecorded source → target coverageApproachTypeTeam sizeRegionPublic evidence kind
10CloudsOn-premises applications to AWS—Delivery firmMid-sizePolandOfficial capability documentation0 internal relationship records
AccentureJava EE, Monolith to Spring Boot, Microservices
RefactorRewrite
Delivery firmEnterpriseGlobalPublic sources not reviewed here2 internal relationship records
ArkencyRuby on Rails (multiple versions) to Ruby on Rails 7.1 (example plan)
Refactor
Delivery firmBoutiquePolandOfficial capability documentation1 internal relationship record
BackstageCoverage not recorded—Product or platform——Public sources not reviewed here0 internal relationship records
BelitsoftPHP to Laravel
RefactorRewrite
Delivery firmEnterprisePolandPublic sources not reviewed here1 internal relationship record
Beyond CodePHP to Laravel
RefactorRewrite
Delivery firmBoutiqueGermanyPublic sources not reviewed here1 internal relationship record
BigBinaryRuby on Rails (versions unspecified) to Ruby on Rails (latest version)
Refactor
Delivery firmMid-sizeUSA and IndiaOfficial capability documentation1 internal relationship record
CapgeminiJava EE to Spring Boot
Refactor
Delivery firmEnterpriseGlobal (France HQ)Public sources not reviewed here1 internal relationship record
Codeminer42Ruby on Rails (versions unspecified) to Ruby on Rails (versions unspecified)—Delivery firmMid-sizeBrazilPublic sources not reviewed here0 internal relationship records
Evil MartiansFrom: Ruby on Rails—Delivery firmBoutiqueUSAPublic sources not reviewed here0 internal relationship records
FastRuby.ioRuby on Rails (multiple versions) to Ruby on Rails (multiple versions)
Refactor
Delivery firmBoutiquePhiladelphia, PA, USA (distributed team)Supplier-reported case study; Official capability documentation1 internal relationship record
GlobantMonolith to Microservices
RefactorRewrite
Delivery firmEnterpriseGlobal (Argentina Origins)Public sources not reviewed here1 internal relationship record
HashrocketFrom: Ruby on Rails—Delivery firmBoutiqueUSAPublic sources not reviewed here0 internal relationship records
IflexionPHP to Laravel
RefactorRewrite
Delivery firmEnterpriseUSAPublic sources not reviewed here1 internal relationship record
InfosysJava EE to Spring Boot
Refactor
Delivery firmEnterpriseGlobal (India HQ)Public sources not reviewed here1 internal relationship record
KirschbaumPHP to Laravel
RefactorRewrite
Delivery firmMid-sizeUSAPublic sources not reviewed here1 internal relationship record
NearformMonolith to Microservices
RefactorRewrite
Delivery firmMid-sizeGlobalPublic sources not reviewed here1 internal relationship record
OpenRewriteJava 8 to Java 17
Refactor
Product or platform——Official capability documentation0 internal relationship records
Planet ArgonRuby on Rails (multiple versions) to Ruby on Rails (multiple versions)
Refactor
Delivery firmBoutiqueUSASupplier-reported case study; Official capability documentation1 internal relationship record
ReinteractiveRuby on Rails (multiple versions) to Ruby on Rails (latest stable)
Refactor
Delivery firmMid-sizeAustraliaOfficial capability documentation; Supplier-reported case study1 internal relationship record
RuboCop RailsCoverage not recorded—Product or platform——Public sources not reviewed here0 internal relationship records
SaelounRuby on Rails 3 and later to Ruby on Rails 8
Refactor
Delivery firmBoutiqueUSA and IndiaOfficial capability documentation1 internal relationship record
ScaloFrom: PHP—Delivery firmMid-sizeWrocław, Poland (US office in Plano, TX)Supplier-reported case study0 internal relationship records
ScienceSoftClassic ASP, ASP.NET 4.5, Salesforce to React, .NET, Azure—Delivery firmMid-sizeMcKinney, TX, USA (offices in Europe, Mexico and the Gulf)Supplier-reported case study0 internal relationship records
SlalomMonolith to Microservices
RefactorRewrite
Delivery firmEnterpriseUSA / GlobalPublic sources not reviewed here1 internal relationship record
SpatieTo: Laravel
RefactorRewrite
Delivery firmBoutiqueBelgiumOfficial capability documentation1 internal relationship record
TCSJava EE to Spring Boot
Refactor
Delivery firmEnterpriseGlobal (India HQ)Public sources not reviewed here1 internal relationship record
thoughtbotCoverage not recorded
Refactor
Delivery firmMid-sizeUSAPublic sources not reviewed here1 internal relationship record
ThoughtworksMonolith, PHP to Microservices, AWS
RefactorRewrite
Delivery firmEnterpriseChicago, IL, USA (global)Supplier-reported case study1 internal relationship record
TightenPHP to Laravel, Vue.js
RefactorRewrite
Delivery firmBoutiqueUSAOfficial capability documentation1 internal relationship record
VehiklPHP to Laravel
RefactorRewrite
Delivery firmMid-sizeCanadaPublic sources not reviewed here1 internal relationship record
WiproJava EE to Spring Boot
Refactor
Delivery firmEnterpriseGlobalPublic sources not reviewed here1 internal relationship record

The count covers this site’s migration and service links for each company, listed under its entry. It does not count verified case studies or successful projects.

The checked public sources, scoped claims and limits for suppliers across hubs are published as an open vendor evidence dataset with CSV and JSON downloads.

Application modernization alternatives to TCS, Infosys, and Wipro

Choose alternatives for the work you need. The checked examples above include FastRuby.io’s supplier-reported Procore upgrade case and current Ruby/Rails service documentation. OpenRewrite documents recipes for selected Java 8-to-17 changes that your team must run and review. Check who will handle the rest of the engagement before treating either as a replacement for an integrator.

Use the delivery-firm and team-size filters to find specialist candidates. Check their source-target experience, delivery responsibilities, and references. Confirm prices and timelines directly; the evidence here does not compare cost or delivery speed. For engagement scope, cost, and acceptance criteria, use the legacy application modernization services guide.

Updated ·Peter Korpak·Methodology

What evidence should a provider show?

Use these guides to decide what to ask providers and what evidence to require before accepting their work. Internal record counts and capability labels do not establish that a provider meets your requirements.

Approach matrix

How Legacy Application Modernization companies map to modernization approach

Rows group legacy application modernization companies by modernization approach, defined in our 7 Rs of application modernization framework; columns separate product vendors from delivery firms.

Refactor is the most common approach here, documented by 24 of 32 companies in legacy application modernization. Product vendors and delivery firms both cluster in Refactor.
ApproachProductDelivery firm
Rehostsame code, new infrastructure or emulatorProductNone documentedDelivery firmNone documented
Replatformsame core code, swapped runtime or managed servicesProductNone documentedDelivery firmNone documented
Refactorthe existing code is converted or restructured in placeProductDelivery firm
Rewriterebuilt from scratch on a new architectureProductNone documentedDelivery firm
Replaceswapped for a commercial or SaaS productProductNone documentedDelivery firmNone documented
Retain & optimizekept in place and improvedProductNone documentedDelivery firmNone documented

8 companies are not plotted: no documented approach evidence.

What each company delivers in legacy application modernization

One entry per company, carrying only attributes we can point at a source for. Where a company has no published evidence for an attribute, nothing is shown rather than a placeholder.

  • 10Clouds

    Agency

    Lists AWS application migration (lift and shift, re-architecting) and Node.js and Python backend engineers. Its published service, case-study and blog pages do not describe PHP or Laravel migration work.

    Modernizes
    On-premises applications to AWS
    Firm profile
    Mid-size · Poland

    Public evidence for this capability

    • Replatform or re-architect on AWS

      On-premises applications (languages and frameworks unspecified) to AWS

      10Clouds lists AWS lift-and-shift migration and re-architecting of legacy systems for AWS, with a cloud transition strategy and continuing support.

      Supplier responsibility: Migration service provider; the page also describes 10Clouds as an AWS Select Partner.

      Evidence limit: Service description with no customer, source technology, timeline or measured result. It is not a PHP-to-Laravel, .NET Framework or React-to-Next.js migration.

      Official capability documentation · Seamless application migration to AWS

      Source publication date not stated · Source checked

  • Accenture

    Agency

    Accenture applies its own myNav platform to chart the migration path for both Java EE-to-Spring Boot conversions and monolith-to-microservices decompositions, aimed at Global 2000 enterprises decoupling at large scale.

    RefactorRewrite
    Best for
    Global 2000 enterprises with massive fleets
    Modernizes
    Java EE, Monolith to Spring Boot, Microservices
    Firm profile
    Enterprise · Global
  • Arkency

    Agency

    Rails upgrade service that prepares two incremental upgrade plans after a repository review, with an example sequence from Rails 5.2 to 7.1 and Ruby 2.6 to 3.3. Domain-driven design appears in its separate workshops, not on the upgrade page.

    Refactor
    Modernizes
    Ruby on Rails (multiple versions) to Ruby on Rails 7.1 (example plan)
    Firm profile
    Boutique · Poland
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Ruby on Rails 5.2.6.2 on Ruby 2.6.9 (example plan) to Ruby on Rails 7.1.3.4 on Ruby 3.3.2 (example plan)

      Arkency describes a Rails upgrade service that analyses the repository, prepares two upgrade plans, and works in small iterations that it says succeed even with minimal test coverage.

      Supplier responsibility: Rails upgrade provider working through pull requests and asynchronous communication with the client team.

      Evidence limit: Service description with an illustrative upgrade sequence, not a named customer upgrade. The zero-downtime and test-coverage claims are the supplier's own and no customer, duration or measured result is given.

      Official capability documentation · Ruby on Rails Upgrade Services (Zero Downtime)

      Source publication date not stated · Source checked

  • Backstage

    Platform

    Backstage is an open-source developer-portal framework, originally built by Spotify, organized around a software catalog for service ownership and CI/CD status rather than any migration capability. The self-hosted version still requires a team to build and host its own plugins rather than running as turnkey SaaS.

  • Belitsoft

    Agency

    Belitsoft runs a department built specifically for PHP-to-Laravel migration, marketed as the budget-conscious, cost-effective outsourcing option rather than a premium-priced engagement.

    RefactorRewrite
    Best for
    Budget-conscious migrations
    Modernizes
    PHP to Laravel
    Firm profile
    Enterprise · Poland
    Internal research links
    PHP to Laravel Migration Services
  • Beyond Code builds custom tooling for its PHP-to-Laravel migrations, aimed at projects whose conversion needs go beyond what an off-the-shelf script can handle.

    RefactorRewrite
    Best for
    Projects requiring custom migration tooling
    Modernizes
    PHP to Laravel
    Firm profile
    Boutique · Germany
    Internal research links
    PHP to Laravel Migration Services
  • BigBinary

    Agency

    Lists Ruby on Rails upgrades alongside maintenance, performance work, code audits and team augmentation, and describes its work as Rails only. Its upgrade page names no source or target Rails versions.

    Refactor
    Modernizes
    Ruby on Rails (versions unspecified) to Ruby on Rails (latest version)
    Firm profile
    Mid-size · USA and India
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Ruby on Rails applications (versions unspecified) to Latest Ruby on Rails version

      BigBinary says it has upgraded many Rails applications over 14 years and brought them to the latest version of Ruby on Rails.

      Supplier responsibility: Rails upgrade provider; the same site lists maintenance, performance work, code audits and team augmentation.

      Evidence limit: Service description that names no customer, starting version, method or measured result. It does not mention React.

      Official capability documentation · Ruby on Rails upgrades

      Source publication date not stated · Source checked

  • Capgemini

    Agency

    Capgemini runs its Java EE-to-Spring Boot conversions under an 'Economic Application Modernization' approach, aimed at on-premise workloads moving to Cloud Foundry or Kubernetes while optimizing run cost.

    Refactor
    Best for
    Moving from on-prem to Cloud Foundry/K8s
    Modernizes
    Java EE to Spring Boot
    Firm profile
    Enterprise · Global (France HQ)
  • Provides vetted engineers (Ruby, JavaScript, Go, AWS, mobile) through staff augmentation, plus technical audits for teams optimizing legacy systems. It publishes a Rails upgrade guide but lists no dedicated Rails upgrade service.

    Modernizes
    Ruby on Rails (versions unspecified) to Ruby on Rails (versions unspecified)
    Firm profile
    Mid-size · Brazil
  • Documents database and background-job performance work on Rails monoliths, including Sidekiq infrastructure for Gusto, and a Rails CI speedup service. Its services pages list Rails consulting but no dedicated Rails upgrade service.

    Modernizes from
    Ruby on Rails
    Firm profile
    Boutique · USA
  • Offers Ruby and Rails upgrades and a roadmap report estimating effort per minor version jump. Supplier-hosted cases cover a 2020 Procore Rails 5.0-to-5.1 upgrade and a September 2026 Irish Chess Union Rails 7.0-to-8.1 upgrade.

    Refactor
    Modernizes
    Ruby on Rails (multiple versions) to Ruby on Rails (multiple versions)
    Firm profile
    Boutique · Philadelphia, PA, USA (distributed team)
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Ruby on Rails 5.0 to Ruby on Rails 5.1

      FastRuby reports that OmbuLabs worked with Procore on its Rails 5.0-to-5.1 upgrade, starting with issues on an existing Rails 5.1 branch.

      Supplier responsibility: OmbuLabs engineers collaborated with Procore; FastRuby.io is its productized upgrade service.

      Evidence limit: Supplier-hosted account with a named client executive testimonial, not independently published customer confirmation. The 2020 case does not establish current delivery capability for later Rails versions.

      Supplier-reported case study · Upgrading a Large Rails App From 5.0 to 5.1

      Source published or updated · Source checked

    • Ruby/Rails upgrades

      Ruby on Rails 7.0 to Ruby on Rails 8.1

      FastRuby reports upgrading the Irish Chess Union's Rails application from 7.0 to 8.1 one minor version at a time using dual-booting with the next_rails gem, with the ICU webmaster quoted on the outcome.

      Supplier responsibility: FastRuby engineers set up CI and made the version-upgrade pull requests, working with Claude Code and FastRuby's open-source upgrade skill.

      Evidence limit: Supplier-hosted account with a named client quote, not independently published customer confirmation. The client is a volunteer-run association with a small, conventional codebase, so it says little about large enterprise applications.

      Supplier-reported case study · Irish Chess Union Upgrades to Rails 8.1

      Source published or updated · Source checked

    • Ruby/Rails upgrades

      Ruby and Rails applications (versions unspecified) to Client-selected Ruby and Rails versions

      FastRuby offers Ruby and Rails upgrades and an application-specific roadmap that assesses dependencies and estimates effort per minor version jump.

      Supplier responsibility: Upgrade engineers and assessment provider working with the application team.

      Evidence limit: Current service claim, not proof of a delivered upgrade to any particular version. Target versions and effort depend on the application assessment.

      Official capability documentation · From technical debt to technical health

      Source publication date not stated · Source checked

  • Globant

    Agency

    Globant applies its Augmented Coding AI tooling to speed up legacy-code understanding ahead of monolith-to-microservices moves, aimed at consumer-facing platforms handling high traffic.

    RefactorRewrite
    Best for
    Consumer-facing high-traffic apps
    Modernizes
    Monolith to Microservices
    Firm profile
    Enterprise · Global (Argentina Origins)
  • Offers web and mobile development, interface design and training in Rails, Elixir and React from Jacksonville Beach and Chicago. Its services page says it works with new and existing apps but lists no dedicated Rails upgrade service.

    Modernizes from
    Ruby on Rails
    Firm profile
    Boutique · USA
  • Iflexion

    Agency

    Enterprise applications with many third-party integrations are Iflexion's stated fit for PHP-to-Laravel migration, delivered inside its broader full-cycle web and mobile development practice.

    RefactorRewrite
    Best for
    Enterprise apps with many 3rd party integrations
    Modernizes
    PHP to Laravel
    Firm profile
    Enterprise · USA
    Internal research links
    PHP to Laravel Migration Services
  • Infosys

    Agency

    Infosys frames its Java EE-to-Spring Boot conversions as a cost-effective, automated migration path under its Cobalt platform, rather than a fully bespoke code rewrite.

    Refactor
    Best for
    Cost-effective code conversion
    Modernizes
    Java EE to Spring Boot
    Firm profile
    Enterprise · Global (India HQ)
  • Kirschbaum delivers PHP-to-Laravel migration through staff augmentation, aimed at US-based teams needing immediate expert help rather than a fully outsourced project.

    RefactorRewrite
    Best for
    US-based teams needing immediate expert help
    Modernizes
    PHP to Laravel
    Firm profile
    Mid-size · USA
    Internal research links
    PHP to Laravel Migration Services
  • Nearform

    Agency

    Node.js and cloud-native performance anchor Nearform's monolith-to-microservices work, drawn from a wider practice in high-performance digital products and open-source Developer Experience tooling.

    RefactorRewrite
    Best for
    High-performance backend modernization
    Modernizes
    Monolith to Microservices
    Firm profile
    Mid-size · Global
  • OpenRewrite

    Platform

    Recipe tooling for Java upgrades, with a documented Java 8-to-17 path covering selected API, dependency and build changes. The guide identifies manual remediation and recipe licensing limits.

    Refactor
    Modernizes
    Java 8 to Java 17

    Public evidence for this capability

    • Java version upgrades

      Java 8 to Java 17

      The guide documents recipes for selected API, dependency and build changes when upgrading Java 8 applications to Java 17.

      Supplier responsibility: Refactoring engine and recipe tooling; application teams run and review the changes.

      Evidence limit: Capability documentation, not a customer delivery record. The guide requires manual fixes for uncovered changes; compiled migration recipes are restricted to Moderne customers, with local compilation permitted for non-commercial use.

      Official capability documentation · Migrate to Java 17

      Source publication date not stated · Source checked

  • Offers Rails upgrade assessments, an upgrade kickoff roadmap for teams with their own developers, full-service upgrades and a maintenance retainer, and also supports Laravel, PHP, Python and React. Its Rails 5.2-to-7.1 upgrade account is anonymised.

    Refactor
    Modernizes
    Ruby on Rails (multiple versions) to Ruby on Rails (multiple versions)
    Firm profile
    Boutique · USA
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Ruby on Rails 5.2 on Ruby 2.6 to Ruby on Rails 7.1 on Ruby 3.2

      Planet Argon reports upgrading an unnamed client's Rails 5.2 application in phases to Rails 7.1, with Ruby moving from 2.6 to 3.2, while the app stayed online.

      Supplier responsibility: Planet Argon engineers planned and carried out the phased upgrade and added tests around critical payment logic.

      Evidence limit: Anonymised, supplier-published account with no customer name, publication date, duration or independent confirmation. The Rails 8 step is described as a path, not a completed upgrade.

      Supplier-reported case study · A Rails 8 Upgrade Story: Building Momentum Without a Rewrite

      Source publication date not stated · Source checked

    • Ruby/Rails upgrades

      Ruby on Rails applications across many versions to Supported Ruby on Rails versions

      Planet Argon offers a full-service Rails upgrade and says it has completed dozens of upgrades of mature Rails applications.

      Supplier responsibility: Upgrade provider that also offers maintenance after the upgrade.

      Evidence limit: Service description; no customer, version path or measured result is named, and the dozens-of-upgrades figure is the supplier's own.

      Official capability documentation · Modernize Your Rails App

      Source publication date not stated · Source checked

  • Rails upgrade service that begins with a review of the Gemfile, Gemfile.lock and rake stats and a time-and-cost estimate. A UCAR case documents three applications moved from Rails 3.1 and Ruby 1.9 to the latest stable versions.

    Refactor
    Modernizes
    Ruby on Rails (multiple versions) to Ruby on Rails (latest stable)
    Firm profile
    Mid-size · Australia
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Ruby and Rails applications (all versions, per the supplier) to Latest Ruby and Rails versions

      reinteractive describes an upgrade process that starts from the Gemfile, Gemfile.lock and rake stats output, gives a time and cost estimate, then upgrades Ruby and Rails and tests in staging before production rollout.

      Supplier responsibility: Rails upgrade provider; it also sells fixed-price OpsCare and CodeCare maintenance after the upgrade.

      Evidence limit: Service description with no named customer, version path or measured result. The all-versions claim is the supplier's own.

      Official capability documentation · Ruby on Rails Version Upgrade Service

      Source publication date not stated · Source checked

    • Ruby/Rails upgrades

      Three Field Catalog Web Portal applications on Ruby as old as 1.9 and Rails as old as 3.1 to Latest stable Ruby and Rails versions (not numbered on the page)

      reinteractive reports upgrading three UCAR applications over several months, from Ruby 1.9 and Rails 3.1 at the oldest to the latest stable versions, finishing ahead of schedule and budget according to a UCAR engineer.

      Supplier responsibility: reinteractive developers ran the upgrade with UCAR staff in daily stand-ups and joint testing.

      Evidence limit: Supplier-hosted case with named UCAR quotes, not independently published. The page shows no date and does not give the target version numbers or the cost.

      Supplier-reported case study · UCAR's Mission Critical Rails Upgrade

      Source publication date not stated · Source checked

  • RuboCop Rails is a community-maintained lint extension, split out of RuboCop core in 2018, that flags deprecated APIs and unsafe patterns in codebases running Rails 4.2 or newer. It surfaces what needs fixing during an upgrade but leaves the actual code changes to a developer.

  • Saeloun

    Agency

    Rails upgrade service for moving older Ruby and Rails versions to supported releases through deprecation cleanup, test stabilization and rollout planning; its page title spans Rails 3 to Rails 8. Also offers React, Next.js and React Native work.

    Refactor
    Modernizes
    Ruby on Rails 3 and later to Ruby on Rails 8
    Firm profile
    Boutique · USA and India
    Internal research links
    Ruby on Rails Upgrade Services

    Public evidence for this capability

    • Ruby/Rails upgrades

      Older Ruby and Rails versions (Rails 3 and later, per the page title) to Supported Ruby and Rails releases (up to Rails 8)

      Saeloun says it moves older Ruby and Rails versions to supported releases with deprecation cleanup, test stabilization, dependency upgrades and production rollout planning.

      Supplier responsibility: Rails upgrade provider that also offers fixed-cost monthly or annual upgrade and maintenance contracts.

      Evidence limit: Service description. The only case study linked on the page, Haulhub, is a new e-ticketing build, so no customer upgrade is documented.

      Official capability documentation · Ruby on Rails Upgrade Services | Rails 3 to Rails 8

      Source publication date not stated · Source checked

  • Scalo

    Agency

    Staged migration of legacy PHP systems to supported PHP versions, Laravel development, and a general legacy modernization practice with a named Wolters Kluwer rebuild. No PHP-to-Laravel migration offering is documented.

    Modernizes from
    PHP
    Firm profile
    Mid-size · Wrocław, Poland (US office in Plano, TX)

    Public evidence for this capability

    • Rebuild legacy .NET application

      Legacy legal-software product (technology not disclosed) to New version built with Angular and .NET on Microsoft Azure

      Scalo reports that its engineers worked alongside Wolters Kluwer on a new, cloud-first version of a legacy legal-software product, citing lower maintenance costs and a simplified architecture.

      Supplier responsibility: Scalo software engineers worked on the new application version alongside the client.

      Evidence limit: Supplier-published account with no dates, project size or measured results, and no independent confirmation; the legacy technology and the migration method are not disclosed.

      Supplier-reported case study · Advancing law practice operations with a cloud-first modernization

      Source publication date not stated · Source checked

  • Reports incremental modernization of a supply-chain SaaS application: React replacements for Classic ASP and ASP.NET 4.5 module front ends while temporarily retaining the old back end, plus .NET and Azure microservices built with the client team. Its modernization page also lists automated application and database conversion with partner Ispirer Systems.

    Modernizes
    Classic ASP, ASP.NET 4.5, Salesforce to React, .NET, Azure
    Firm profile
    Mid-size · McKinney, TX, USA (offices in Europe, Mexico and the Gulf)

    Public evidence for this capability

    • Incremental .NET modernization

      Classic ASP and ASP.NET 4.5 module front ends; Salesforce-based back end to React module front ends; .NET and Azure microservices

      ScienceSoft reports replacing inventory and shipping module front ends with React while temporarily retaining the old back end, and assisting with separate .NET and Azure microservices.

      Supplier responsibility: Supplied .NET developers who worked alongside the client team on modernization and support.

      Evidence limit: Supplier report for an unnamed client, without independent confirmation. It describes selected modules and retained legacy components rather than a completed replacement of the whole application; the page says the collaboration began in 2019 and was continuing in January 2024.

      Supplier-reported case study · Modernization of a Supply Chain SaaS Product Used by 3,000 Businesses Worldwide

      Source publication date not stated · Source checked

  • Slalom

    Agency

    Slalom leads its monolith-to-microservices delivery with a strategy-first business case, backed by partnerships across AWS, Azure, and Google Cloud rather than a single-cloud playbook.

    RefactorRewrite
    Best for
    Agile transformation
    Modernizes
    Monolith to Microservices
    Firm profile
    Enterprise · USA / Global
  • Spatie

    Agency

    Offers Laravel development for new and legacy web applications, including application analysis, architecture and automated tests. Its service page does not document a specific PHP-to-Laravel migration.

    RefactorRewrite
    Modernizes to
    Laravel
    Firm profile
    Boutique · Belgium
    Internal research links
    PHP to Laravel Migration Services

    Public evidence for this capability

    • Laravel development for legacy applications

      Legacy web applications (starting stack unspecified) to Laravel

      Spatie says its web development service accommodates legacy applications and builds Laravel codebases with automated tests.

      Supplier responsibility: Laravel development partner offering application analysis, architecture and implementation.

      Evidence limit: Service description, not a documented PHP-to-Laravel migration or version upgrade. No customer, starting framework, migration sequence or measured result is given.

      Official capability documentation · Web development

      Source publication date not stated · Source checked

  • TCS

    Agency

    TCS positions its MasterCraft suite as the tool-assisted path for Java EE-to-Spring Boot conversions, aimed at risk-averse enterprises that want automation handling the conversion rather than a fully manual rewrite.

    Refactor
    Best for
    Risk-averse, tool-assisted migration
    Modernizes
    Java EE to Spring Boot
    Firm profile
    Enterprise · Global (India HQ)
  • Rails consultancy that maintains open-source Rails tooling such as FactoryBot; confirm current Rails-version upgrade coverage directly.

    Refactor
    Best for
    Rails teams that want a consultancy behind open-source testing tooling such as FactoryBot; confirm Rails-version upgrade coverage separately
    Firm profile
    Mid-size · USA
    Internal research links
    Ruby on Rails Upgrade Services
  • Reports replacing a monolithic mainframe payments platform with AWS-hosted microservices, and extracting a legacy PHP 7 monolith into microservices for Docebo. The supplier cases do not state that either project used the Strangler Fig pattern.

    RefactorRewrite
    Modernizes
    Monolith, PHP to Microservices, AWS
    Firm profile
    Enterprise · Chicago, IL, USA (global)

    Public evidence for this capability

    • Monolith decomposition

      Monolithic mainframe issuer-processing platform to AWS-hosted microservices

      Thoughtworks reports working with a financial services company to replace a monolithic mainframe payments platform with AWS-hosted microservices and redesign its data models and workflows.

      Supplier responsibility: Modernization partner for the client’s issuer-processing platform.

      Evidence limit: Supplier report for an unnamed client, without independent confirmation. It does not disclose a cutover sequence or establish that the project used the Strangler Fig pattern.

      Supplier-reported case study · Fortune 500 financial services organization

      Source publication date not stated · Source checked

    • Decommission legacy PHP monolith

      Legacy PHP 7 monolith approaching end of support to Modular microservices architecture on AWS

      Thoughtworks reports extracting features from Docebo's legacy PHP 7 monolith into a new microservices architecture on AWS, with a quoted Docebo executive and vendor-reported gains in database response time and throughput.

      Supplier responsibility: Thoughtworks teams extracted features, built a platform team and ran a port-and-mend process on outdated PHP code alongside Docebo's staff.

      Evidence limit: Supplier-hosted account with a named client executive's quote, not independently published customer confirmation; undated, and the performance figures are for specific queries and workloads.

      Supplier-reported case study · Docebo: decommissioning legacy services to create a streamlined, scalable platform foundation

      Source publication date not stated · Source checked

  • Tighten

    Agency

    Laravel consultancy whose codebase upgrades service says it can convert legacy PHP apps to Laravel and Vue and run Laravel upgrades. It also sells embedded teams, developer mentoring and workshops, and is listed on Laravel's partners page.

    RefactorRewrite
    Modernizes
    PHP to Laravel, Vue.js
    Firm profile
    Boutique · USA
    Internal research links
    PHP to Laravel Migration Services

    Public evidence for this capability

    • Convert legacy PHP to Laravel

      Legacy PHP application to Laravel with Vue

      Tighten says its codebase upgrade service can convert a legacy PHP app to modern Laravel and Vue, and lists Laravel upgrades and tech stack modernization among its disciplines.

      Supplier responsibility: Laravel consultancy that says it has maintained PHP applications since before Laravel 1.0.

      Evidence limit: Service description aimed at small and mid-sized clients. No named PHP-to-Laravel conversion, starting framework, duration or result is given; a client quote from Blue Zebra Sports says its app was modernized front to back but does not state the starting stack.

      Official capability documentation · Codebase Upgrades

      Source publication date not stated · Source checked

  • Vehikl

    Agency

    Vehikl migrates PHP to Laravel using mob programming and test-driven development, aimed at reskilling a client's internal team during the migration rather than afterward.

    RefactorRewrite
    Best for
    Reskilling your internal team while migrating
    Modernizes
    PHP to Laravel
    Firm profile
    Mid-size · Canada
    Internal research links
    PHP to Laravel Migration Services
  • Wipro

    Agency

    Wipro runs Java EE-to-Spring Boot conversions through its FullStride Cloud Services line, pairing the code migration with the underlying infrastructure move rather than treating the two separately.

    Refactor
    Best for
    End-to-end infrastructure + app migration
    Modernizes
    Java EE to Spring Boot
    Firm profile
    Enterprise · Global

Market map

Companies to evaluate for Legacy Application Modernization

Scope: published legacy application modernization companies with documented category, migration-path, or service evidence in this research domain.

Last evaluated

208

Published modernization companies reviewed

32

Companies shown for legacy application modernization

Platforms 3Consultancies & integrators 29

Inclusion criteria: A company must have a published profile and documented category, migration-path, or service evidence in this domain. See the evidence threshold in our research methodology.

How to choose: Start with documented buyer fit (14 profiles) and specialty evidence (32), then narrow by team size (29) and location (29). Open a profile to verify the underlying experience before shortlisting.

This is an alphabetical market map, not an ordinal ranking. Inclusion is based on documented evidence and editorial review.

Legacy application modernization requires different suppliers for different intervention paths. Platforms and tools support portfolio discovery, code analysis, automated transformation, testing, observability, and target runtimes; consultancies and integrators design and deliver rehost, replatform, refactor, rearchitect, replace, retain, or retire programs. Compare tools by language coverage, output maintainability, runtime lock-in, and validation controls. Compare delivery partners by legacy-stack expertise, target-architecture capability, comparable program evidence, team scale, and location. The roster is alphabetical because provider fit changes with the selected path.