Top 10 Software Development Companies in the USA 2026

It used to be that U.S. businesses bought software off the shelf to meet their needs. These days, software is often the product itself.

Banks have apps built around how they do business. Retailers compete on checkout speed. Hospitals depend on software to schedule patients and manage medical records. All of it needs skilled developers. The U.S. Bureau of Labor Statistics counts 1,717,800 software developer jobs in 2025, with a median wage of $135,980 a year, and expects employment to grow 10% from 2025 to 2035. That’s a big reason many companies hire an outside software development company.

There are a lot of options. Some firms employ tens of thousands of engineers, and some have around 100 senior people. We ranked software engineering firms that are headquartered in the U.S. or run their main U.S. base here by head count, using the most recent figure each company reports. For publicly traded firms that came from SEC filings; for private ones, from the company’s own website or a trusted directory. The three firms on the list with fewer than 250 employees are ranked by years in business. This guide looks at the top 10 software development companies in the USA for 2026, what each does best, and who should hire them.

Also Read: Top 10 IT Companies in USA 2026

Why Businesses Are Investing in Custom Software Development

Ready-made software still works for plenty of business needs. But more U.S. companies now want software that fits the way they work, not the other way round.

Talent Is Expensive

The median pay for a software developer in the U.S. is $135,980 a year, according to the BLS. Build your own in-house team and you’re paying that for several people, every year. Hire a software development company and you can add the senior developers a project needs, then scale back once it ships.

AI Has Raised the Bar

Customers expect smart search, suggestions and help from the products they use. That takes software with AI built in, plus solid data and cloud work behind it. It’s no accident that AI already accounts for nearly a third of revenue at Grid Dynamics.

Legacy Systems Are Holding Companies Back

A lot of U.S. businesses still run their core operations on decades-old code. Updating it safely, without stopping the business, is specialist work. It’s one of the most common reasons to use a custom software development company in the USA.

Speed to Market Matters More Than Ever

A good software development company shows up ready, with experienced engineers, UX designers and QA testers already in place. That can get you to market months sooner than hiring and training a new team.

Top 10 Software Development Companies in the USA at a Glance

Top 10 Software Development Companies in the USA (2026)

Below, we review each software development company in order of head count, starting with the largest.

1. EPAM Systems

Founded in 1993 and based in Newtown, Pennsylvania, EPAM Systems is the largest software engineering firm on our list. It had about 62,850 people on June 30, 2026, roughly 56,650 of them delivery professionals. Its revenue for 2025 came to $5.457 billion, up 15.4%, according to its results release.

On August 6, 2026, EPAM reported second-quarter revenue of $1.415 billion, up 4.5% from the same quarter a year earlier. Balazs Fejes became CEO on September 1, 2025, and co-founder Arkadiy Dobkin moved to executive chairman. Fejes says EPAM is building a “next generation forward-deployed engineering organization” around AI-native work. Gartner named EPAM a Leader in its Magic Quadrant for Custom Software Development Services in 2023 and 2024.

Key Software Development Solutions
✔ Enterprise platform and product engineering
✔ AI-native application development
✔ Cloud migration and modernization
✔ Digital experience and design

Best for: Large enterprises that need engineering capacity at global scale.

2. Thoughtworks

Thoughtworks was founded in Chicago in 1993. Today it has more than 10,000 people in 47 offices across 18 countries. It had been listed on the Nasdaq since 2021 and went private in 2024 in a $1.75 billion deal with Apax Funds. Mike Sutcliff became CEO in 2024.

The firm is known for its depth in agile software development. The Selenium test automation framework grew out of work started inside Thoughtworks, and it has published its Technology Radar since 2011. In 2026 it launched AI/works and Agent/works for building and governing AI agents. In August it joined Anthropic’s Claude partner network as a Select-tier services partner, and in October Gartner named it a Visionary in the 2026 Magic Quadrant for Custom Software Development Services. Clients it announced this year include Nestlé Brazil and Expand Energy.

Key Software Development Solutions
✔ Legacy and mainframe modernization
✔ Agentic AI platforms and governance
✔ Data and AI engineering
✔ Product and experience design

Best for: Enterprises that want to change how they build software, not just add developers.

3. Grid Dynamics

Grid Dynamics was founded in September 2006 and is based in San Ramon, California. It went public on the Nasdaq in March 2020 and trades as GDYN. It had 4,838 employees on June 30, 2026, and focuses on digital engineering for Fortune 1000 companies.

AI is now at the center of its business. Grid Dynamics reported second-quarter 2026 revenue of $108.2 million, up 7.0% year over year, and a record 30.7% of it came from AI work. CEO Leonard Livschitz has said the company is “building the company around AI.” It expects 2026 revenue of $435 million to $465 million. In the first quarter, all five of its largest accounts were outside retail for the first time, with technology and financial services in the lead.

Key Software Development Solutions
✔ AI and machine learning engineering
✔ Cloud platform and data engineering
✔ Digital commerce platforms
✔ Quality engineering and DevOps

Best for: Tech and financial companies with serious AI and data ambitions.

4. BairesDev

BairesDev was founded in 2009 in Buenos Aires, Argentina, by Nacho De Marco and Pablo Azorin. It expanded into Brazil, Colombia and Mexico in 2011 and started U.S. operations in San Francisco in 2012. Today more than 4,000 people work for the company, from over 40 countries.

The nearshore model is BairesDev’s selling point. U.S. clients get developers who work in time zones close to their own. The company says it has completed more than 1,480 projects for over 500 companies, and it lists clients such as Google, Pinterest, Rolls-Royce, Adobe and Salesforce. CEO Nacho De Marco won an EY Entrepreneur of the Year award in 2024. BairesDev made the Financial Times list of America’s fastest-growing companies in 2025, and Computerworld named it one of the Best Places to Work in IT for 2026.

Key Software Development Solutions
✔ Dedicated nearshore development teams
✔ Staff augmentation
✔ End-to-end software outsourcing
✔ QA, testing and DevOps

Best for: U.S. companies that want to scale engineering teams quickly in overlapping time zones.

5. Chetu

Chetu was founded in 2000 and is based in Sunrise, Florida. Founder and CEO Atal Bansal started the company in a 200-square-foot office in Miami. Today it has nearly 2,800 software experts across 13 locations in the U.S., Europe and Asia.

Chetu’s strength is industry depth. It builds custom software for more than 40 industries, from healthcare and payments to gaming, hospitality and real estate. When it marked its 25th anniversary in April 2025, Chetu reported record annual revenue of $74.54 million, its third straight year above $70 million, all of it from organic growth. It also added alliances with UKG and Workday and reached IBM Silver Partner status. In 2025 the South Florida Business Journal named it to its list of the region’s largest private companies for the 15th time.

Key Software Development Solutions
✔ Industry-specific custom software
✔ Software integration and APIs
✔ HR and payroll platform customization
✔ Ongoing support and maintenance

Best for: Mid-size firms that want developers who already know their industry.

6. ScienceSoft

ScienceSoft traces its roots to 1989 and is based in McKinney, Texas, in the Dallas area. It has more than 750 employees and says it has completed over 4,300 projects for more than 1,500 clients.

It specializes in healthcare and financial services, including insurance and investment. In 2026 it made the Financial Times ranking of the Americas’ fastest-growing companies for the fifth year in a row, at No. 229, and the IAOP Global Outsourcing 100 for the fifth straight year. It appeared on the CRN Solution Provider 500 for the first time in 2025. That year, a lending platform it built for Atlas Credit was named best-in-class loan management system at the Global FinTech Innovation Awards. ScienceSoft has also made the Inc. 5000 list every year from 2023 to 2025.

Key Software Development Solutions
✔ Healthcare software and medical apps
✔ Lending, banking and insurance platforms
✔ AI solutions for regulated industries
✔ Software maintenance and support

Best for: Healthcare and financial firms that need regulated-industry experience.

7. Fingent

Founded in 2003, Fingent is based in New York. It has about 580 employees and delivery centers in India, the UAE and Australia, and says it has delivered more than 800 projects.

Fingent builds custom enterprise software for healthcare, financial services, logistics, real estate and consumer goods. Its work covers web and mobile apps, SaaS products, AI, AR/VR, IoT and SAP. The company says its clients have included Mastercard, Johnson & Johnson, Boston Consulting Group and Sony. It’s ISO 27001 certified, holds a 4.9/5 rating on Clutch, and made the Inc. 5000 list in 2022.

Key Software Development Solutions
✔ Custom enterprise software
✔ SaaS product development
✔ AI and process automation
✔ Mobile and web applications

Best for: Mid-market companies that want an enterprise-grade partner without big-firm overhead.

8. Atomic Object

Atomic Object was started in 2001 in Grand Rapids, Michigan, by Carl Erickson and Bill Bereza. It has about 115 employees across four offices: Grand Rapids, Ann Arbor, Chicago and Raleigh-Durham.

The company is employee-owned and a certified B Corp. Most of its people work a hybrid schedule but spend most of the week in the office. In 2025 its Ann Arbor team, which has grown from four people to 45, moved into a larger office on North Ashley Street with room for 100 employees. Atomic Object builds custom web, mobile and embedded software. Cleveroad’s 2026 roundup puts its project budgets at $50,000 to more than $1 million, and it holds a 5.0/5 rating on Clutch.

Key Software Development Solutions
✔ Custom web and mobile apps
✔ Embedded and connected device software
✔ Product design and UX research
✔ Software modernization

Best for: Companies that want a close, onshore team of senior makers.

9. Saritasa

Founded in 2005, Saritasa is based in Irvine, California, and has another office in Tampa, Florida. Directory listings put its team at between 50 and 249 people.

Saritasa is known for long client relationships. One healthcare communications client says the firm has supported its uSummit events platform for over 14 years. It builds custom software, mobile and web apps, legacy modernization projects and AR/VR, and named clients include Makita, Winegard and The Cheesecake Factory. According to its Clutch profile, about 40% of its work is custom software development and about 30% is AR/VR, and it holds a 4.8/5 rating there from 108 reviews.

Key Software Development Solutions
✔ Custom software development
✔ AR and VR applications
✔ Legacy system modernization
✔ Mobile and web development

Best for: Mid-size businesses that want a long-term, U.S.-managed development partner.

10. SumatoSoft

SumatoSoft was founded in 2012 and is based in Boston, Massachusetts, with a development center in Warsaw, Poland. Directory listings put its team at 51 to 200 people.

It has built more than 350 custom solutions for clients in over 25 countries, including Toyota and Beiersdorf. Its industries include healthcare, logistics, fintech, edtech, e-commerce, adtech and manufacturing, with a strong focus on IoT and SaaS. About 70% of its engineers are senior, and it reports 98% client satisfaction. SumatoSoft is ISO 27001 and ISO 9001 certified and won a 2026 Clutch award as one of Boston’s top Python and Django developers.

Key Software Development Solutions
✔ IoT software development
✔ SaaS product development
✔ Custom web applications
✔ Software testing and QA

Best for: Startups and mid-size firms building connected or SaaS products.

How to Choose the Right Software Development Partner in the USA

The best software development company for a bank is rarely the best one for a startup raising its first round. Here are a few things to check before you choose.

Match Size to Your Project

A firm like EPAM has the people to staff a multi-year transformation. A smaller company like Atomic Object may put more senior attention on a focused product. Either way, ask who’s actually going to write your code, and how many other projects they’re juggling.

Check Industry Experience

Healthcare, banking and insurance software come with strict rules on data and security. Ask for references from projects like yours, and make sure the firm has worked under the regulations that apply to you.

Look at Security Credentials

ISO 27001 certification is a useful baseline, and several companies on this list hold it. Ask how they protect your source code, credentials and customer data, and who owns the code when the contract ends.

Understand the Delivery Model

Offshore teams usually cost less. Nearshore teams, like those at BairesDev, work hours close to U.S. time zones. Onshore developers usually cost more but are easier to meet in person.

Ask About AI Readiness

With AI everywhere, most firms now say they offer it. Ask what AI products they’ve actually shipped, how they test model output and how they protect customer data.

Frequently Asked Questions About Software Development Companies in the USA

Which is the best software development company in the USA?

Every business is different, so there’s no single best choice. By head count, EPAM Systems is by far the largest firm on this list. But a smaller company such as ScienceSoft, Fingent or Atomic Object can be a better fit for a focused project or a regulated industry.

How much do U.S. software development companies charge?

Rates vary a lot. On Clutch, Saritasa lists $100 to $149 an hour and Atomic Object $150 to $199, while firms that deliver mainly from offshore centers often quote $25 to $49. Get estimates from every company you talk to and compare them with what an in-house team would cost.

Is it better to hire in-house or outsource software development?

It really depends on how central the software is to your business. Many companies keep product ownership in-house and bring in an outside partner for extra capacity, specialist skills or speed. With the BLS projecting 10% job growth for developers from 2025 to 2035, filling in-house roles can take time.

How were these companies ranked?

We looked at software engineering firms headquartered in the U.S. or run from a main U.S. base and ranked them by head count, using each company’s latest reported figure. Firms with fewer than 250 employees are ranked by years in business.

Conclusion

There’s no shortage of software development companies in the U.S. EPAM, Thoughtworks and Grid Dynamics bring scale and deep AI work. BairesDev and Chetu offer large, flexible teams. ScienceSoft, Fingent, Atomic Object, Saritasa and SumatoSoft give closer attention to focused projects.

The right pick depends on your industry, budget and how much of the work you want to own. Use this list of the top 10 software development companies in the USA as a starting point, then talk to two or three firms before you sign.

Related Reading:

• Top 10 Software Development Companies in the UK 2026
• Top 10 SaaS Companies in USA 2026