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.
| Migration task | Suppliers with linked evidence |
|---|---|
| Replatform or re-architect on AWS |
|
| Ruby/Rails upgrades |
|
| Java version upgrades |
|
| Rebuild legacy .NET application |
|
| Incremental .NET modernization |
|
| Laravel development for legacy applications |
|
| Monolith decomposition |
|
| Decommission legacy PHP monolith |
|
| Convert legacy PHP to Laravel |
|
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.
| Company | Recorded source → target coverage | Approach | Type | Team size | Region | Public evidence kind | |
|---|---|---|---|---|---|---|---|
| 10Clouds | On-premises applications to AWS | — | Delivery firm | Mid-size | Poland | Official capability documentation | 0 internal relationship records |
| Accenture | Java EE, Monolith to Spring Boot, Microservices | RefactorRewrite | Delivery firm | Enterprise | Global | Public sources not reviewed here | 2 internal relationship records |
| Arkency | Ruby on Rails (multiple versions) to Ruby on Rails 7.1 (example plan) | Refactor | Delivery firm | Boutique | Poland | Official capability documentation | 1 internal relationship record |
| Backstage | Coverage not recorded | — | Product or platform | — | — | Public sources not reviewed here | 0 internal relationship records |
| Belitsoft | PHP to Laravel | RefactorRewrite | Delivery firm | Enterprise | Poland | Public sources not reviewed here | 1 internal relationship record |
| Beyond Code | PHP to Laravel | RefactorRewrite | Delivery firm | Boutique | Germany | Public sources not reviewed here | 1 internal relationship record |
| BigBinary | Ruby on Rails (versions unspecified) to Ruby on Rails (latest version) | Refactor | Delivery firm | Mid-size | USA and India | Official capability documentation | 1 internal relationship record |
| Capgemini | Java EE to Spring Boot | Refactor | Delivery firm | Enterprise | Global (France HQ) | Public sources not reviewed here | 1 internal relationship record |
| Codeminer42 | Ruby on Rails (versions unspecified) to Ruby on Rails (versions unspecified) | — | Delivery firm | Mid-size | Brazil | Public sources not reviewed here | 0 internal relationship records |
| Evil Martians | From: Ruby on Rails | — | Delivery firm | Boutique | USA | Public sources not reviewed here | 0 internal relationship records |
| FastRuby.io | Ruby on Rails (multiple versions) to Ruby on Rails (multiple versions) | Refactor | Delivery firm | Boutique | Philadelphia, PA, USA (distributed team) | Supplier-reported case study; Official capability documentation | 1 internal relationship record |
| Globant | Monolith to Microservices | RefactorRewrite | Delivery firm | Enterprise | Global (Argentina Origins) | Public sources not reviewed here | 1 internal relationship record |
| Hashrocket | From: Ruby on Rails | — | Delivery firm | Boutique | USA | Public sources not reviewed here | 0 internal relationship records |
| Iflexion | PHP to Laravel | RefactorRewrite | Delivery firm | Enterprise | USA | Public sources not reviewed here | 1 internal relationship record |
| Infosys | Java EE to Spring Boot | Refactor | Delivery firm | Enterprise | Global (India HQ) | Public sources not reviewed here | 1 internal relationship record |
| Kirschbaum | PHP to Laravel | RefactorRewrite | Delivery firm | Mid-size | USA | Public sources not reviewed here | 1 internal relationship record |
| Nearform | Monolith to Microservices | RefactorRewrite | Delivery firm | Mid-size | Global | Public sources not reviewed here | 1 internal relationship record |
| OpenRewrite | Java 8 to Java 17 | Refactor | Product or platform | — | — | Official capability documentation | 0 internal relationship records |
| Planet Argon | Ruby on Rails (multiple versions) to Ruby on Rails (multiple versions) | Refactor | Delivery firm | Boutique | USA | Supplier-reported case study; Official capability documentation | 1 internal relationship record |
| Reinteractive | Ruby on Rails (multiple versions) to Ruby on Rails (latest stable) | Refactor | Delivery firm | Mid-size | Australia | Official capability documentation; Supplier-reported case study | 1 internal relationship record |
| RuboCop Rails | Coverage not recorded | — | Product or platform | — | — | Public sources not reviewed here | 0 internal relationship records |
| Saeloun | Ruby on Rails 3 and later to Ruby on Rails 8 | Refactor | Delivery firm | Boutique | USA and India | Official capability documentation | 1 internal relationship record |
| Scalo | From: PHP | — | Delivery firm | Mid-size | Wrocław, Poland (US office in Plano, TX) | Supplier-reported case study | 0 internal relationship records |
| ScienceSoft | Classic ASP, ASP.NET 4.5, Salesforce to React, .NET, Azure | — | Delivery firm | Mid-size | McKinney, TX, USA (offices in Europe, Mexico and the Gulf) | Supplier-reported case study | 0 internal relationship records |
| Slalom | Monolith to Microservices | RefactorRewrite | Delivery firm | Enterprise | USA / Global | Public sources not reviewed here | 1 internal relationship record |
| Spatie | To: Laravel | RefactorRewrite | Delivery firm | Boutique | Belgium | Official capability documentation | 1 internal relationship record |
| TCS | Java EE to Spring Boot | Refactor | Delivery firm | Enterprise | Global (India HQ) | Public sources not reviewed here | 1 internal relationship record |
| thoughtbot | Coverage not recorded | Refactor | Delivery firm | Mid-size | USA | Public sources not reviewed here | 1 internal relationship record |
| Thoughtworks | Monolith, PHP to Microservices, AWS | RefactorRewrite | Delivery firm | Enterprise | Chicago, IL, USA (global) | Supplier-reported case study | 1 internal relationship record |
| Tighten | PHP to Laravel, Vue.js | RefactorRewrite | Delivery firm | Boutique | USA | Official capability documentation | 1 internal relationship record |
| Vehikl | PHP to Laravel | RefactorRewrite | Delivery firm | Mid-size | Canada | Public sources not reviewed here | 1 internal relationship record |
| Wipro | Java EE to Spring Boot | Refactor | Delivery firm | Enterprise | Global | Public sources not reviewed here | 1 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.
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.
- Evaluate a provider's refactoring or rewrite proposal
Check release plans, tests of existing behavior, coexistence, and rollback for the proposed approach.
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.
| Approach | Product | Delivery firm |
|---|---|---|
| Rehostsame code, new infrastructure or emulator | ProductNone documented | Delivery firmNone documented |
| Replatformsame core code, swapped runtime or managed services | ProductNone documented | Delivery firmNone documented |
| Refactorthe existing code is converted or restructured in place | Product | Delivery firm |
| Rewriterebuilt from scratch on a new architecture | ProductNone documented | Delivery firm |
| Replaceswapped for a commercial or SaaS product | ProductNone documented | Delivery firmNone documented |
| Retain & optimizekept in place and improved | ProductNone documented | Delivery 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
AgencyLists 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
AgencyAccenture 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
- Internal research links
- Java EE to Spring Boot Migration Services, Monolith to Microservices Migration Services
Arkency
AgencyRails 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
PlatformBackstage 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
AgencyBelitsoft 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
AgencyBeyond 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
AgencyLists 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
AgencyCapgemini 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)
- Internal research links
- Java EE to Spring Boot Migration Services
Codeminer42
AgencyProvides 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
Evil Martians
AgencyDocuments 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
FastRuby.io
AgencyOffers 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
AgencyGlobant 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)
- Internal research links
- Monolith to Microservices Migration Services
Hashrocket
AgencyOffers 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
AgencyEnterprise 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
AgencyInfosys 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)
- Internal research links
- Java EE to Spring Boot Migration Services
Kirschbaum
AgencyKirschbaum 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
AgencyNode.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
- Internal research links
- Monolith to Microservices Migration Services
OpenRewrite
PlatformRecipe 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
Planet Argon
AgencyOffers 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
Reinteractive
AgencyRails 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
PlatformRuboCop 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
AgencyRails 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
AgencyStaged 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
ScienceSoft
AgencyReports 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
AgencySlalom 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
- Internal research links
- Monolith to Microservices Migration Services
Spatie
AgencyOffers 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
AgencyTCS 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)
- Internal research links
- Java EE to Spring Boot Migration Services
thoughtbot
AgencyRails 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
Thoughtworks
AgencyReports 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)
- Internal research links
- Monolith to Microservices Migration Services
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
AgencyLaravel 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
AgencyVehikl 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
AgencyWipro 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
- Internal research links
- Java EE to Spring Boot Migration Services
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
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.