Subscribe

Software Modernization Services

What software modernization services are, the seven modernization options they deliver, what each costs, and the neutral company rosters for every modernization domain we track.

Software modernization services are specialist engagements that assess a legacy software estate, choose a target architecture, and deliver the move — retiring, replacing, rehosting, replatforming, refactoring, or rebuilding each system, then proving the result matches the original.

Software Modernization Intelligence does not sell those engagements. We publish the research buyers use to scope and price them: cost and timeline benchmarks from 3,733+ verified projects, and neutral rosters of the 188 companies documented as delivering this work across 12 modernization domains. Nothing on this site is ranked, scored, or rated, and paid placements are labeled wherever they appear.

The seven modernization options

Every modernization engagement resolves to one of seven decisions per system, and the decision — not the vendor — sets the cost, the timeline, and the risk. Scope the option before you shortlist a provider. The full treatment of the 7 Rs, with the criteria for choosing between them, carries the decision framework this list summarizes.

Retain
Leave the system where it is, on purpose, and revisit on a stated date. The cheapest option and the correct one for stable systems with no business pressure behind them.
Retire
Decommission the system and absorb what still matters elsewhere. Portfolio assessments routinely find applications nobody has opened in a year still under support contract.
Repurchase
Replace the custom system with a commercial or SaaS product and migrate the data. Fastest route off a legacy estate where the business logic is not actually differentiating.
Rehost
Move the workload to new infrastructure without changing the code — lift and shift. Lowest risk and fastest exit from a datacenter or a mainframe lease, with none of the running-cost benefit.
Replatform
Move the workload and change the runtime around it — managed database, container platform, new middleware — while the application code stays largely intact.
Refactor
Restructure the code in place: decompose a monolith, replace a dead framework, convert a source language. The most common shape of a modernization engagement and the widest cost band.
Rebuild
Rewrite the system against the same business requirements. The highest cost and the highest risk, justified when the existing implementation is the constraint rather than the platform.

Companies by modernization domain

Each roster below is scoped to one domain and lists only companies this site holds a research record for in it — a documented migration path, a service engagement, or a hub-scoped vendor profile. Every roster is alphabetical and filterable by what a company migrates from, its modernization approach, supplier type, team size, and region.

Legacy code and core systems

Estates where the source language itself is the constraint — COBOL, RPG, PowerBuilder, Visual Basic, Delphi — and the engagement is a conversion with an equivalence-testing burden attached.

Platform, cloud, and delivery

Estates where the code is serviceable and the infrastructure or delivery pipeline is not. Cost is driven by licensing exposure and data gravity rather than by lines of code.

Data, integration, and interface

The layers a modernization program usually discovers late: stored-procedure conversion, warehouse re-pointing, integration contracts, and the front end nobody scoped.

Business systems, security, and governance

Packaged-application programs and the cross-cutting workstreams that run alongside every other engagement on this page.

What these engagements cost

There is no single price for software modernization services, and any provider quoting one before an assessment is quoting a discovery phase. The option decides the order of magnitude: rehosting a workload and rebuilding the same system against the same requirements differ by roughly 10×, and the same application can differ threefold on cost between two estates purely on test coverage and technical-debt profile.

Our software modernization cost benchmarks publish median cost, full range, typical timeline, and success rate for every migration path and professional-services engagement type we track, aggregated from 3,733+ verified projects and broken out per domain. Use them for order-of-magnitude budgeting and to frame vendor conversations — not for fixed-price contracting.

Common questions

What are software modernization services?

Software modernization services are specialist engagements that assess a legacy estate, choose a target architecture, and deliver the move — retaining, retiring, repurchasing, rehosting, replatforming, refactoring, or rebuilding each system. Providers range from boutique conversion specialists to global systems integrators.

What do software modernization services cost?

Cost is set by the option chosen and the estate, not by a rate card. Rehosting a workload and rebuilding the same system differ by an order of magnitude. Our cost benchmarks publish median cost, range, timeline, and success rate per migration path, aggregated from 3,733+ verified projects.

How do you choose a software modernization company?

Start from the option you need delivered, then filter on documented evidence in that specific domain — what the firm has migrated from and to, which approaches it actually delivers, and its supplier layer. A tool vendor selling automation rates and a delivery firm accountable for the outcome are different purchases; most programs need both.