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Top 15 Software Modernization Companies in 2025

This list of the best 15 application modernization companies is aimed to assist businesses in establishing reliable partnerships for successful transformation projects. The service providers introduced in this selection combine experience with innovative approaches to deliver measurable results and spur business growth.

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    Corsac Technologies

Legacy Stacks:

.NET Framework, AngularJS (Angular 1.x), Xamarin, ASP.NET Web Forms, Monolithic architecture, JavaScript, jQuery, React Native, ASP.NET Web Forms, VB.NET, SQL Server Reporting Services (SSRS), JavaScript (ES5), Delphi, ColdFusion, COBOL, FoxPro

Modern Alternatives: 

.NET Core/.NET, Angular​, .NET MAUI, Blazor/WebAssembly​, Microservices architecture​, TypeScript​, React/Vue/Angular​, Flutter​, ASP.NET Core MVC​, C# .NET​, Power BI/Tableau​, JavaScript (ES6+)​, C#​

Hourly Rate: 

Undisclosed

Team Size:

50 - 249

Year Founded:

2007

MARKETS:

USA, Europe

Company Description

Corsac Technologies is an application modernization company that focuses on legacy systems modernization through breaking tech stagnation and minimizing tech debt. The company builds scalable apps that are easy to maintain and update. More than improving code, Corsac helps businesses optimize processes and resource allocation. 
Clients praise their thoughtful approach that prioritizes removing the business growth barriers set by outdated systems and delivery inertia. Operating in regulated sectors such as healthcare, Corsac integrates HIPAA, HL7/FHIR, SOC2, GDPR, ISO compliance into every modernization stage and works inside your Git, CI/CD, and workflow tools for maximum business continuity.

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    Luxoft

Legacy Stacks:

z/OS COBOL, JCL, IMS, CA Gen, and many others

Modern Alternatives: 

RHEL, Python, and many others

Hourly Rate: 

$100 - $149 / hr

Team Size:

10,000+

Year Founded:

2000

Location:

Switzerland

Company Description

Luxoft is a global IT service provider delivering innovative solutions that impact business outcomes. As a software modernization company with a comprehensive approach, Luxoft offers strategic consulting, custom software development services, and digital solution engineering to multinational corporations. Its team utilizes advanced open-source technologies, extensive testing, and continuous integration to guarantee your systems are ready for future challenges. With a wide domain expertise in sectors including financial services, automotive, communications, and healthcare & life sciences, Luxoft helps companies reinforce their competitive stance.

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    Aziro

Legacy Stacks:

-

Modern Alternatives: 

 Migrating apps to modern languages, architectures, and cloud platforms.

Hourly Rate: 

Undisclosed

Team Size:

1,300+

Year Founded:

2007

Location:

India, United States

Company Description

Aziro (formerly MSys Technologies) provides an exhaustive spectrum of legacy systems modernization services aimed to help clients cut operating costs, focusing on more strategic efforts. They reinvent outdated IT infrastructure, infusing agility and stability indispensable in meeting growing business demands. With risk minimization in mind, Aziro applies cutting-edge methods and tools, including the SaaS-based business model, digital solutions, adoption of the cloud, and the latest tech stack, to promote the shift from outdated software and workflows to advanced platforms with limitless expansion opportunities.

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    Sombra

Legacy Stacks:

-

Modern Alternatives: 

NET Core/.NET, Angular​, Microservices architecture​, TypeScript​, React/Vue/Angular​, Flutter​, ASP.NET Core MVC​, C# .NET, JavaScript (ES6+)​, C#

Hourly Rate: 

$50 - $99 / hr

Team Size:

250 - 999

Year Founded:

2013

Location:

Ukraine, Colombia

Company Description

Sombra delivers software product modernization services, from IT consulting to full-cycle software development. The company’s team encompasses over 350 experts globally with keen knowledge and experience in advanced technology, such as cloud solutions, AI/ML, data infrastructure, cybersecurity, and more. Sombra’s engineers focus on meeting their clients’ goals and expectations, with 98% of their projects delivered on time and within scope. They establish a clear and transparent workflow and apply methodologies to make complex tasks more manageable and ensure the clients needs are perfectly matched.

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    Leobit

Legacy Stacks:

WCF, WinForms, VB.NET, Delphi, etc.

Modern Alternatives: 

.NET Core, Angular, microservices, ASP.NET, C#, Azure, WCF, Entity Framework, Blazor, React, Vue, jQuery, TypeScript, PHP, Python

Hourly Rate: 

$25 - $49 / hr

Team Size:

50 - 249

Year Founded:

2014

Location:

Ukraine, Poland 

Company Description

Leobit is a full-cycle .NET, AI, and web application development provider with a mission to help organizations implement successful technological innovation and business transformation. Their software modernization services are primarily directed to technology companies and startups located in the US, EU, and the UK. Clients value their endeavor to build strong partnerships based on trust, transparency, and long-term collaboration. The company proudly holds several awards and certifications, including ISO 27001/9001, ISTQB Gold & MS Gold Partnership, Clutch Top .Net Company Award.

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    Smartbridge

Legacy Stacks:

-

Modern Alternatives: 

AWS, Azure, Docker, Python, Java, Node.js, .NET Core, and many others

Hourly Rate: 

$150 - $199 / hr

Team Size:

50 - 249

Year Founded:

2003

Location:

United States 

Company Description

Smartbridge is among the top legacy systems modernization companies that prioritizes simplifying business transformation for their clients. Through comprehensive partnerships across all stages of IT transformation, Smartbridge leverages thought leadership and innovation to implement customer modernization plans. Their technical range spans digital innovation, data analytics, AI and ML, intelligent automation, and application development. A deep understanding of client needs allows the Smartbridge team to reveal and address the true causes of existing issues and spur the customer’s innovative capabilities.

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    Transparity

Legacy Stacks:

-

Modern Alternatives: 

AWS, Azure, Docker, Python, Java, Node.js, .NET Core, Microservices, and many others

Hourly Rate: 

$100 - $149 / hr

Team Size:

250 - 999

Year Founded:

2015

Location:

England

Company Description

The name and the mission of the Transparity company embodies transformation, partnership, and clarity. These three pillars enable impactful business transformation, with the solutions that deliver the maximum value. Transparity guides its partners on their path from outdated systems and mindsets to the advanced approaches of the digital and AI era. The company’s experts work closely with their clients through all stages, from ideation and strategy to product launch and support, delivering solutions that empower businesses. Tech-savvy engineers, the Transparity’s team holds 6 Microsoft Partner Designations, Azure Expert MSP status and 18 specialisations.

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    Insighture

Legacy Stacks:

-

Modern Alternatives: 

AWS, Azure, Docker, Python, Java, Node.js, .NET Core, Microservices, and many others

Hourly Rate: 

$25 - $49 / hr

Team Size:

50 - 249

Year Founded:

2016

Location:

Australia, Sri Lanka

Company Description

Insighture IT transformation company helps businesses unlock their potential hidden behind the legacy constraints. Their application modernization services aim to facilitate business transition to modern systems that drive operations, reduce expenditures, and fuel innovation. The Insighture team immerses into the client’s specific context and tasks to maximize outcomes in any project, whether it’s bringing a digital concept to life or scaling operations with minimal costs. Insighture also provides ongoing mantenance helping clients shape support teams even for the most complex tasks.

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    Accenture

Legacy Stacks:

-

Modern Alternatives: 

AWS, Azure, Docker, Python, Java, Node.js, .NET Core, Microservices, and many others

Hourly Rate: 

Undisclosed

Team Size:

1,000 - 9,999

Year Founded:

1998

Location:

Hong Kong

Company Description

Accenture is a software development company offering a multi-dimensional approach to delivering comprehensive value to their clients. They help organizations achieve sustainable operational progress, upskill the client’s in-house teams, and generate lasting value. The Accenture’s team prioritizes ethics and integrity as part of their transformational approach, believing that it builds the internal culture and establishes trustworthy partnerships. Their capabilities span cloud infrastructure, cybersecurity, AI, risk management, technology transformation, and advanced tech implementation.

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    ModLogix

Legacy Stacks:

-

Modern Alternatives: 

 Microsoft .NET (C, Visual Basic, FoxPro), Azure, Java, MS Access, SQL Server.

Hourly Rate: 

$25 - $49 / hr

Team Size:

50 - 249

Year Founded:

2014

Location:

United States, Ukraine

Company Description

ModLogics is a software modernization company that provides all-encompassing legacy transformation services. Their team specializes in system audits, legacy upgrades, cloud migration, desktop-to-web conversion, API integration, and software re-engineering. The company transforms outdated software into scalable solutions utilizing .NET technologies. Focusing on .NET Core migration, Visual FoxPro modernization, and Angular migration, the ModLogics’s engineering team attains enhanced performance and data integrity. The company’s experts believe that the key to cost-effective and feasible solutions is their granular approach to the modernization process.

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    Innowise

Legacy Stacks:

-

Modern Alternatives: 

AWS, Microsoft Azure, Google Cloud, Kubernetes, Docker

Hourly Rate: 

$50 - $99 / hr

Team Size:

1,000 - 9,999

Year Founded:

2007

Location:

Poland, Ukraine, Germany, Lithuania

Company Description

Innowise is a legacy modernization company offering bespoke services for businesses to transform their old IT infrastructure. Their team addresses the clients’ issues by conducting system audits, software re-engineering, API integration, and cloud migration. With careful approach and dedicated specialists, Innowise reveals and fixes restraints like legacy vendor dependency and excessive IT costs to enhance scalability, optimize expenses, and reinforce competitive stance. They expertly perform all stages of the transformation journey, including consulting, custom development, modernization, and post-launch support.

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    Code District

Legacy Stacks:

-

Modern Alternatives: 

Angular, React, Clojure, microservices, Cloud-ready systems, and many others

Hourly Rate: 

$25 - $49 / hr

Team Size:

250 - 999

Year Founded:

2017

Location:

United States, Pakistan, Canada

Company Description

Code District occupies a well-deserved place in a top 15 list of web and mobile application modernization companies, crafting advanced, AI-empowered products. It meticulously analyzes client’s pains to provide a comprehensive remedy, enabling faster business launches, cleaner user experiences, minimal manual involvement, and effortless scaling to handle increased traffic. Prioritizing transparency and open communication, Code District works just like your in-house team, treating your goals as their-own ones. Thanks to their mindful culture and valuable results, the company is trusted by businesses of various sizes across industry sectors.

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    Onix

Legacy Stacks:

-

Modern Alternatives: 

Python, Node.js, Java, Ruby, PHP, AWS, Azure, Google Cloud Platform, Heroku, DigitalOcean

Hourly Rate: 

$25 - $49 / hr

Team Size:

250 - 999

Year Founded:

2000

Location:

Ukraine, Poland, Slovakia

Company Description

Onix is a full-cycle software developer specializing in practical solutions for startups, small and medium-sized businesses. Their professional focus includes a suite of software development services emphasizing business expansion and reinforced tech capability. The Onix’s team can lead your idea from a concept to a viable product that delivers real business results. Their successful projects are backed by well‑established methodologies and years of experience in building exceptional custom software solutions.

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    Euristiq

Legacy Stacks:

-

Modern Alternatives: 

AWS, Google Cloud, Kubernetes, React, Angular, Vue.js, Python, Golang, Node.js, Java, Kotlin, .Net

Hourly Rate: 

$50 - $99 / hr

Team Size:

50 - 249

Year Founded:

2016

Location:

Canada, Ukraine, Poland

Company Description

Euristiq provides legacy system modernization services intended to drive functionality and operational efficiency. They perform cloud migration, application re-engineering, and mainframe modernization, as well as architecture advisory and software maintenance to help businesses regain competitive edge and establish future-proof systems. The company is in the avant-garde of implementing breakthrough tech, building AI-native custom software that supports IoT, AIoT, and data analytics to drive performance and security.

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    TSRI

Legacy Stacks:

35+ Languages
COBOL, PL/1, JCL, CA-IDEAL, Ada, Fortran, and more 

Modern Alternatives: 

Java, C#, .NET Core, C++, and more

Hourly Rate: 

Undisclosed

Team Size:

50 - 249

Year Founded:

1995

Location:

United States

Company Description

TSRI modernizes applications using Composite AI (deterministic AI & generative AI) to make them ready for the cloud and other modern architectural environments. The company transforms business applications for future challenges and business expansion quickly and efficiently, minimizing operational disruption. Over 30 years of software modernization & refactoring experience have shaped their automated modernization approach that practically eliminates risks and errors and reduces the duration of modernization projects to months vs. years. Clients confirm the team’s flexibility and innovation and the business value they receive through the collaboration.

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How to Choose the Best Provider Among Application Modernization Companies

Assess expertise and experience

Examine application modernization companies through the prism of their professional focus and proven experience. Prioritize providers that● Deliver solutions in your legacy stack● Specialize in removing legacy barriers and delivery inertia to enable seamless growth● Have proven track record with measurable outcomes

Ensure tech stack meets your needs

Choose the partner whose technology and transformation approach conforms to your needs and goals.● Check the experience in your industry and with technologies your project requires● Make sure they act with respect to your existing architecture● Favor companies that aim to preserve your investments, evolving what works and replacing only what must change

Examine the potential partner’s portfolio

When exploring the legacy modernization vendors’ case studies, focus on the following factors:● A comprehensive service range Regulatory compliance across all stages: HIPAA, HL7/FHIR, SOC2, GDPR, ISO● The ability to uncover the hidden costs of legacy systems: slow hiring, feature delays, security gaps, lost deals

Study clients’ feedback

Real project reviews will help discover the vendor’s strengths and weaknesses in terms of● Reliability● Product quality● Communication● Post-launch supportFrom personal impressions to real business impact, client reviews can grant valuable insights into cooperation with a specific vendor.

Evaluate communication and project management

The way software modernization companies arrange communication and control the project implementation is a crucial indicator of their commitment to attaining your business result. What should you expect?● Adaptive planning● Regular updates and demos● Progress-tracking● Phased rollouts● Strong quality assurance

Ensure a vendor delivers continual support

Once the software product goes live, it requires maintenance, updates, and potential refinements to maximize business impact. A responsible partner would provide:● Documentation and developer tools● Training of your internal team● Consulting and support● Upskilling of your in-house developers

At Corsac Technologies, we’re here to breathe new life into your legacy software, ensuring a smooth and future-ready transformation

Modernization

Software Migration

Engineering

Industries

© Created by Corsac Technologies

Privacy Policy

terms and conditions

All rights Reserved

At Corsac Technologies, we’re here to breathe new life into your legacy software, ensuring a smooth and future-ready transformation

Modernization

Software Migration

Engineering

Industries

© Created by Corsac Technologies

Privacy Policy

terms and conditions

All rights Reserved