Top Software Development Companies in Seattle, WA
We ranked 11 software development companies in and around Seattle, WA on client reviews, how many are verified, service focus and profile completeness. Includes companies in nearby Bellevue, Kirkland, Redmond and Issaquah. Updated October 2026. How rankings work
Teams that design, build and maintain software, from web and mobile apps to the internal systems a business runs on.
- Rank 1
Nashville software and AI consultancy building custom platforms, data architecture, AI agents and forecasting models for hospitality, healthcare and more.
No reviews yet
Seattle, WA
- AI & Automation
- Custom Software Development
- API & Integration Development
- Rank 2Down 1 from #1
Kirkland, Washington software firm building HIPAA-compliant healthcare systems, EHR integrations and AI products for health-tech companies.
No reviews yet
Kirkland, WA
- Custom Software Development
- API & Integration Development
- AI & Automation
- Rank 3Down 1 from #2
Seattle digital agency designing and developing websites, headless commerce, web and mobile applications, and AI-enabled features.
No reviews yet
Seattle, WA
- Web Development
- Mobile App Development
- AI & Automation
- Team
- 10-49 people
- Rank 4Down 1 from #3
Seattle software firm building custom business applications, mobile apps and system integrations, and modernizing and supporting existing software.
No reviews yet
Seattle, WA
- Custom Software Development
- Mobile App Development
- API & Integration Development
- Rank 5Down 1 from #4
App and AI development agency with a Redmond office, building mobile apps and agentic AI products for mid-market and enterprise companies.
No reviews yet
Redmond, WA
- AI & Automation
- Mobile App Development
- Product Design & Development
- Team
- 100-249 people
- Rank 6Down 1 from #5
Seattle studio that plans, builds, deploys and operates custom software and applied AI systems for growing companies.
No reviews yet
Seattle, WA
- Custom Software Development
- AI & Automation
- Product Design & Development
- Rank 7Down 1 from #6
Digital agency that plans, designs, develops, hosts and supports websites and web applications built on WordPress, Drupal and Django.
No reviews yet
Seattle, WA
- Web Development
- UX/UI Design
- Custom Software Development
- Rank 8Down 1 from #7
Seattle-area studio that designs, builds, tests, launches and maintains native iOS and Android apps for startups and large companies.
No reviews yet
Issaquah, WA
- Mobile App Development
- UX/UI Design
- Rank 9Down 1 from #8
Seattle interactive studio creating mobile apps, games, websites and video for consumer, entertainment and technology brands.
No reviews yet
Seattle, WA
- Mobile App Development
- Web Development
- UX/UI Design
- Rank 10Down 1 from #9
Bellevue firm that pairs strategy, experience design, software, hardware and AI engineering to take products from concept to launch.
No reviews yet
Bellevue, WA
- Product Design & Development
- Custom Software Development
- AI & Automation
- Team
- 250-999 people
- Rank 11Down 1 from #10
Seattle UX modernization firm that researches, designs and builds updated systems, portals and workflows for service-driven organizations.
No reviews yet
Seattle, WA
- Product Design & Development
- UX/UI Design
- Custom Software Development
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