Outsource your project to the best software companies in Bellevue to access their nationally competitive expertise at accessible rates. Size up their portfolios, reviews, prices, teams to choose the most suitable software developer for your needs, requirements and budget.

Best Bellevue Software Development Firm Rankings

14 Companies - Rankings updated: August 14, 2026

Every agency on DesignRush meets evaluation criteria around expertise and client feedback to empower informed choices. Some listings include paid partnerships.

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United States × Washington × Bellevue ×

  • Sigma Software

    Superior Business Solutions

    Sigma Software specializes in developing software and is a globally distributed team of more than 2000 skilled IT professionals, spanning 12 countries including the USA, Sweden, UK, Canada, Israel, Singapore, UAE, Australia, Austria, Ukraine, and more. With a track record of over 20 successful years, we take...

    Top Services:

    • Software Development
    • Web Design
    • Mobile App Development
    • VR/AR
    • Business Consulting
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    14 Projects Listed

    Sigma Software Services

    • Software Development
    • Web Design
    • Mobile App Development
    • VR/AR
    • Business Consulting
    • Web Development
    • UI/UX Design
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Knorr-Bremse
    • AstraZeneca
    • Volvo Penta
    • SAS
    • Fortum
    • Mindvalley
    • Aol.
    • IGT
    • Viaplay
    • DanAds
    Data sourced from the agency's DesignRush profile

    Sigma Software Reviews & Testimonials

    • Nikita Vershinin
      Nikita Vershinin VP of Engineering at Ankorstore
      5.0 ★

      Software Development Review from Nikita Vershinin

      We've partnered with Sigma Software for almost three years, and they proved to be a strong partner with whom we'll keep working. Their adaptability and willingness to get things done are unique, setting them apart from other providers. Moreover, they demonstrate a strong sense of ownership.

    • Michael Meyer
      Michael Meyer Managing director at trendwaerts GmbH
      5.0 ★

      Software Development Review from Michael Meyer

      We were so positively surpised and happy about Sigmas services - as usual I might add. It is a pleasure working with their software engineers. After we provided a briefing, the effort estimation came right away. Shortly after the project started we could see first tangible results. The code quality was excellent and comprehensive. Minor feedback was implemented right away. What can I say more: 10 out of 10 points!

    • Esther Howard
      Esther Howard Founder / CEO at Bezyl
      5.0 ★

      Mobile App Development Review from Esther Howard

      The client is incredibly happy with Sigma's services and work. It has referred 3 other clients who also say how much they really love the team and process to get set up with the agency. Sigma is a fantastic company with excellent experienced professionals. Its experts care about quality and customer satisfaction, and they operate like the internal team's extension. (Verified via email)

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.6 4.6 (4)
    4.8 4.8 (81)

  • Altarey

    Big ambition. Small steps. Great results

    Big ambition. Small steps. Great results

    US based custom software development company with local presence in New York, Seattle and Bogota that has a strong industry focus on FinTech, E-Commerce and Blockchain industries. Besides being a great IT employer, we have been featured in Global Outsourcing List...

    Top Services:

    • Blockchain
    • Mobile App Development
    • Software Development
    • Business Consulting
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $80/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    9 Projects Listed
    View Profile

  • FlexMade

    World class software development

    World class software development

    Headquartered in Seattle, USA, FlexMade is a software development company that also has delivery centers and branch offices in Germany, Poland, and Ukraine. Our mission is to develop scalable and dependable software for both individual and corporate clients from North America, Europe, and Asia, leveraging...

    Top Services:

    • Software Development
    Location
    Bellevue, Washington
    Number of Employees
    100 - 249
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000
    View Profile
    5.0 5.0 (30)

  • Clean Power Research

    Powering Smarter Energy Decisions.

    Powering Smarter Energy Decisions.

    Our cloud software services are powering the energy transformation by enabling the greentech sloutions...

    Top Services:

    • Software Development
    Location
    Bellevue, Washington
    Number of Employees
    500 - 999
    View Profile

  • SlickDigital

    Propel Your Business Forward

    Propel Your Business Forward

    SlickDevs is a premier custom software development company specializing in transforming innovative ideas into robust, scalable applications. With a dedicated team of experts, we provide comprehensive solutions tailored to meet the unique needs of tech startups, mid-market companies, and enterprise...

    Top Services:

    • Mobile App Development
    • Software Development
    • Software Testing
    • Blockchain
    • IoT
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Portfolios Count
    5 Projects Listed
    View Profile

  • Pacific Northwest Software

    Building Reliable Software Solutions Since 1998.

    Building Reliable Software Solutions Since 1998.

    Pacific Northwest Software provides contract software consulting. We make sure we understand our customers business so that we can provide the IT solutions as inexpensively as possible...

    Top Services:

    • Software Development
    • UI/UX Design
    Location
    Bellevue, Washington
    Number of Employees
    Under 49
    View Profile

  • Synodic Arc

    Synodic Arc is a team of passionate developers and artists.

    Synodic Arc is a team of passionate developers and artists.

    Synodic Arc is a team of passionate developers and artists pushing the envelope of the next generation of games. We take ideas wherever they come, and we never want to do the same thing twice. Our goal is to create a unique player experience that reminds you of why you started playing games in the first...

    Top Services:

    • Software Development
    • VR/AR
    • Mobile App Development
    Location
    Bellevue, Washington
    Number of Employees
    Under 49
    Minimal Budget
    $10,000 - $25,000
    View Profile

  • Grant Thornton

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and...

    Top Services:

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed
    View Profile
    4.5 4.5 (13)

  • 9series

    Handcrafted Technology Solutions

    Handcrafted Technology Solutions

    At 9series, we help organizations move beyond traditional software by building intelligent systems powered by AI...

    Top Services:

    • Mobile App Development
    • AI Development
    • IoT
    • Software Development
    • Cloud Consulting
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $40/hr
    Portfolios Count
    3 Projects Listed
    View Profile

  • Affirma Consulting

    Trusted technology solutions!

    Trusted technology solutions!

    Affirma is a full-service technology consultancy, situated in Bellevue, WA, that has been awarded for its services. Our expertise lies in Mobile, Cloud, Business Intelligence, SharePoint, Technology Infrastructure, Custom Development, Visual Design, and Staffing Services...

    Top Services:

    • Software Development
    • IT Services
    • Cloud Consulting
    • CRM Consulting
    • Digital Marketing
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    500 - 999
    Average Hourly Rate
    $149/hr
    Minimal Budget
    $1,000 - $10,000
    View Profile
    4.7 4.7 (31)

  • Fresh Consulting

    Let's Build

    Let's Build

    Integrating strategy, technology, and design to build what's next...

    Top Services:

    • Product Design
    • UI/UX Design
    • Web Development
    • Web Design
    • eCommerce Development
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $225/hr
    View Profile
    4.9 4.9 (17)

  • MSOFT

    Technology Partner

    Technology Partner

    Since 2014, MSOFT has created high-load, complex, and distributed systems for enterprise clients. We engage industry leaders in digital transformation, designing online platforms and products, automating processes, and developing smart strategies in a digital environment...

    Top Services:

    • Web Development
    • Mobile App Development
    • Software Development
    Location
    Bellevue, Washington
    Number of Employees
    100 - 249
    Average Hourly Rate
    $75/hr
    Minimal Budget
    $25,000 - $50,000
    View Profile

  • Pacific Software Publishing

    Helping Businesses Thrive Online with Websites, Email, and Marketing Solutions.

    Helping Businesses Thrive Online with Websites, Email, and Marketing Solutions.

    More than 40,000 companies of all sizes around the world trust us for their website, email, hosting, and other online services...

    Top Services:

    • SEO
    • Digital Marketing
    • Web Design
    • Software Development
    • Graphic Design
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    Under 49
    View Profile
    4.5 4.5 (56)

  • Persistent

    See Beyond, Rise Above.

    See Beyond, Rise Above.

    Persistent Systems, a renowned global leader in software product development and technology services. Delve into our innovative offerings to stay ahead in the ever-evolving landscape of technology...

    Top Services:

    • AI Development
    • Software Development
    • Web Development
    • Mobile App Development
    • Blockchain
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $50,000 & Up
    View Profile
    4.6 4.6 (730)

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