Top Custom Software Development Companies in the USA

Between them, the 306 IT service providers on this page cover web development (274), web design (245), software development (209) and mobile app development (155). They also list work in California, New York, Washington and Oregon. 290 of them have written a profile you can read before you get in touch.

1. 241

   

   Medidata Solutions

   Mobile App Development · Search Engine Optimization · Web Development

   Medidata is leading the digital transformation of life sciences, with the world's most used platform for clinical development, commercial, and real-world data.

   Write a review
2. 242

   

   ThoughtWorks

   Web Development · Web Design · Software Development

   A community of passionate individuals whose purpose is to revolutionize software design, creation, and delivery, while advocating for positive social change.

   Write a review
3. 243

   

   Agosto, Inc.

   Web Development · Web Design · Software Development

   Founded in 2001, Agosto is a Google Premier Partner and cloud product development company collaborating with organizations looking for a fresh perspective to work smarter with…

   Write a review
4. 244

   

   BL3NDlabs

   Web Development · Web Design · Software Development

   BL3NDlabs is a strategy, design & technology firm. We build ideas for companies changing the future of business.

   Write a review
5. 245

   

   Next Idea Tech, Inc

   Web Development · UI/UX Design · Software Testing

   Next Idea Tech is a thriving company of professional developers, designers, and QA engineers.

   Write a review
6. 246

   

   Lumina

   Web Development · Web Design · Software Development

   At Lumina, we believe that technology should be friendly, not frustrating. It should empower your business, not impede it.

   Write a review
7. 247

   

   POWERSHiFTER

   Web Development · Web Design · Software Development

   Powershifter is a digital strategy and production agency that partners with fast-growing brands to build winning digital experiences and products that delight customers.

   Write a review
8. 248

   

   PRI

   Mobile App Development · Web Development · Web Design

   We build and grow engaging digital experiences driven by meticulous strategy and design. PRI is a full-service creative agency.

   Write a review
9. 249

   

   7Factor Software

   Web Development · Web Design · Software Development

   7Factor software is a software and cloud services company focused on helping build innovation into all aspects of your software delivery pipeline.

   Write a review
10. 250

    

    Zivoke

    Mobile App Development · Web Development · Web Design

    Think Salesforce Think Zivoke! We have been awarded among the Top Salesforce Consulting Companies 2018 by Upcity! The End to End Salesforce & Pardot Consulting Company.

    Write a review
11. 251

    

    Specific Pixel

    Mobile App Development · Web Development · Web Design

    About Us: At Specific Pixel, we're a team of dedicated designers and developers that are passionate about building applications and websites.

    Write a review
12. 252

    

    Windmill Strategy

    Search Engine Optimization · Web Development · Web Design

    Windmill Strategy helps technical, industrial and manufacturing companies surpass competitors and grow faster.

    Write a review
13. 253

    

    Idea Marketing Group, Inc.

    Social Media Marketing · Web Development · Web Design

    Idea Marketing Group offers award-winning web design, web development, and digital marketing services to clients all over the world.

    Write a review
14. 254

    

    Post Modern Marketing

    Search Engine Optimization · Social Media Marketing · Web Development

    We are a Sacramento-headquartered internet marketing and web design company dedicated to providing businesses and non-profits with successful Internet marketing campaigns and…

    Write a review
15. 255

    

    Jacob Tyler Agency

    Search Engine Optimization · Social Media Marketing · Web Development

    Jacob Tyler is a Full-Service Branding and Digital Communications Agency.

    Write a review
16. 256

    

    Transfuture

    Mobile App Development · Search Engine Optimization · Social Media Marketing

    Transfuture is a Brooklyn-based digital consultancy specializing in web and mobile strategy, branding and design solutions for businesses and non-profits.

    Write a review
17. 257

    

    Split Reef

    Search Engine Optimization · Web Development · Web Design

    Split Reef is a modern, results-driven digital organization always ready to support clients in their search for digital supremacy.

    Write a review
18. 258

    

    Clockwork Design Group, Inc

    Search Engine Optimization · Web Development · Web Design

    At Clockwork Design Group, we love a creative challenge. We help businesses grow through innovative branding, website design, and development, advertising campaigns, as well as all…

    Write a review
19. 259

    

    Solid Digital, LLC

    Web Development · Web Design · Software Development

    Solid Digital is a full-service digital agency, guiding businesses to achieve digital growth through award-winning work in design, software development, and digital marketing.

    Write a review
20. 260

    

    Studio 22

    Web Development · Web Design · WordPress

    Studio 22 Design is a creative design firm located in the San Francisco Bay area.

    Write a review
21. 261

    

    TRIXMEDIA Inc

    Search Engine Optimization · Web Development · Web Design

    TRIXMEDIA offers branding services to help your business grow in a changing world. Establish and build your image. Send strong messages that bring your brand to life.

    Write a review
22. 262

    

    Trajectory Web Design

    Mobile App Development · Search Engine Optimization · Web Development

    Have limited time, money and staff to devote to your website? Trajectory is an expert web design and digital marketing company that knows how to do more with less.

    Write a review
23. 263

    

    LyntonWeb

    Mobile App Development · Social Media Marketing · Web Development

    Here at LyntonWeb, we are in the business of making our clients successful with inbound marketing.

    Write a review
24. 264

    

    To The Moon Media

    Social Media Marketing · Web Development · Web Design

    To The Moon is a full-service agency specializing in traditional and digital marketing.

    Write a review

Articles

Related reading

Articles on this subject first, then the newest.

All articles

United States of America

17 Sept 2026 · TrustList Editorial

Startup funding in the US: the 2026 guide for founders

SBIR and STTR after the 2025 lapse, NSF, NIH and DOE seed funds, SBA programmes, SSBCI, angel groups and accelerators: US startup funding…

Software Development

17 Sept 2026 · TrustList Editorial

How to choose a software development company: the 2026 buyer's guide

How to brief a software development company, what to check before you sign, and the contract terms on code ownership, personal data and…

Software Development

13 May 2024 · Aspire Software Comsultancy

Navigating the Selection Process: Tips for Choosing the Right Custom Software Development Firm

Selecting the right Custom Software Development Company is a pivotal decision that can influence your project's success, budget, and…