Find the top mobile app development companies in Washington that create high-performing and user-friendly apps to help businesses drive conversions. Use our practical tool to filter them by cost, team size and client reviews.

Best Washington Mobile App Developers

5 Companies - Rankings updated: September 04, 2026

All agencies on DesignRush undergo evaluation based on professional expertise and verified client reviews. Please note that certain placements are paid partnerships.

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  • Probey Services

    Verified Verified by the DesignRush team for authenticity and credibility.

    World's #1 Rated & Reviewed App, Website & Software Development Company

    Specializing in iOS, Android, and Flutter app development, Probey Services builds custom solutions that grow with businesses. Backed by 12+ years of experience and a team of 320+ specialists, it has delivered 1,800+ projects and served 120+ clients, including Waze and the Cleveland Clinic...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $10/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    94 Projects Listed

    Probey Services Services

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Digital Marketing
    • Digital Services
    • SEO
    • IT Services
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Bartisans
    • Samyakk
    • 30 Days Fitness
    • Isharya
    • The Estate Residences
    • VegenMart
    • Fresh Menu Application
    • PRAO Fashion Jewellery
    • Audentia Space
    • Wings of Change
    Data sourced from the agency's DesignRush profile

    Probey Services Reviews & Testimonials

    • Rajat Sinh
      Rajat Sinh Founder at Aaayan Systems
      5.0 ★

      Web Development Review from Rajat Sinh

      Probey transformed our outdated website into a modern, high-performing platform by understanding our business goals and delivering the right solutions. Since the launch, we have seen significant growth in website traffic, lead conversions, and operational efficiency through their backend integrations. Impressed with their expertise and quality of work, we also trusted Probey with our CRM development project as well. Thank you to the entire Probey Services team for your professionalism and support.

    • Roshan
      Roshan CEO at NanoTherapX
      5.0 ★

      Web Design Review from Roshan

      This is Roshan, CEO at NanoTherapX. Working with Probey Services for our CRM Development. What stood out most was their stability, consistency, reliability, and a smooth implementation. The CRM has streamlined our client management, improved team efficiency, and helped us manage operations more effectively. Since its implementation, we've seen better productivity and consistent business growth. I highly recommend Probey Services UK to any business looking for a reliable technology partner.

    • Tejaswini
      Tejaswini Director at Green Matter Packaging
      5.0 ★

      Mobile App Development Review from Tejaswini

      What stands out most about Probey Services is their discipline-no missed calls, no vague timelines, and no surprises. They built our mobile app with a level of professionalism that made us feel like a priority throughout the project. The delivery was on schedule, the code quality was excellent, and the final product met high standards. Since the app launch, we've seen consistent business growth, and managing customer orders has become much more efficient. I highly recommend Probey Services UK to any business looking for a dependable technology partner.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (110)
    5.0 5.0 (1)

  • Design In DC

    Verified Verified by the DesignRush team for authenticity and credibility.

    A Digital Agency For The Future

    Design in DC engineers native and cross-platform apps that power businesses through prototyping, UI/UX design, m-commerce development, backend API development, QA, App Store submission, and optimization. Its impressive client portfolio includes Under Armour, the World Bank, and Virginia Tech...

    Top Services:

    • Web Development
    • Web Design
    • UI/UX Design
    • Video Production
    • Logo Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $160/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    11 Projects Listed

    Design In DC Services

    • Web Development
    • Web Design
    • UI/UX Design
    • Video Production
    • Logo Design
    • Graphic Design
    • Digital Marketing
    • Digital Services
    • Advertising
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Consumer Bankers Association
    • Examit
    • Summit Ridge Energy
    • JFL Consulting
    • Lateenz
    • Solar Landscape
    • Warfel Construction
    • CiviClick
    • Priovant Therapeutics
    • Hilton
    Data sourced from the agency's DesignRush profile

    Design In DC Reviews & Testimonials

    • Mackenzie Shriner
      Mackenzie Shriner Owner at Distinctive Deck Designs
      4.8 ★

      Web Design Review from Mackenzie Shriner

      I contracted design in DC to build me a custom website. they were accommodating of my budget, very responsive, and gave good insight on layout, content and design. the process was very straightforward and the final product is great!

    • Jo Maney
      Jo Maney Principal at BGR Group
      5.0 ★

      Web Design Review from Jo Maney

      DDC has been an excellent partner since we engaged with them in 2023. The DDC team worked with us to completely redesign our website and work to provide ongoing digital marketing services. The DDC team has been responsive, proactive, and thorough with their work. They are also very transparent about how they operate and how much time special projects will require. We have referred DDC to several clients and partners thanks to their outstanding process and product. DDC is a very professional, creative, and well-organized team.

    • Sapna Doshi, Ph.D.
      Sapna Doshi, Ph.D. Owner at Mind Body Health LLC
      5.0 ★

      Web Design Review from Sapna Doshi, Ph.D.

      My experience working with Design in DC was incredible. Everyone was friendly, approachable, and seemed to genuinely care about helping create the best possible website for my business. They were also invested in making sure the process was one in which I enjoyed and felt taken care of. The regular meetings made me feel like I was a priority and that progress was continually being made. I so appreciated the attention to detail in regards to the user experience. The collaboration in understanding my wishes and desires for the website and user experience was met with patience and paying attention to detail on my behalf. Not only were they taking my suggestions but offering their own to help me maximize the potential of my website. The design and functionality is more than what I could have imagined. I know, undoubtedly, that the work that Design in DC did for me will help my business grow. After wasting money in years past on website designers, I was worried I'd be doing hte same here. I was wrong. I don't think I'll ever need to search for another website designer group again. I would recommend this group to anyone I know. Thank you, Design in DC! It was an absolute pleasure working with all of you!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (10)
    5.0 5.0 (47)

  • Wolfpack Digital

    Powerful Tech Products Start-to-End

    Proud 2024 Webby Award winner in the Responsible AI category and winner of the European Technology Awards for App Development in 2021...

    Top Services:

    • Mobile App Development
    • Web Development
    • Software Development
    • Web Design
    • IoT
    • Show more
    Location
    Kirkland, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    68 Projects Listed

    Wolfpack Digital Services

    • Mobile App Development
    • Web Development
    • Software Development
    • Web Design
    • IoT
    • UI/UX Design
    • AI Development
    • Product Design
    • IT Services
    • Blockchain
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • No7 Pro Derm Scan
    • Everon
    • Juggle
    • Brain Capture
    • Deezer
    • Equality AI
    • Citizen Mint
    • Primary.Health
    • Banqup
    • Slow Delta
    Data sourced from the agency's DesignRush profile

    Wolfpack Digital Reviews & Testimonials

    • Julie Dodkins
      Julie Dodkins CEO at Fae
      5.0 ★

      Mobile App Development Review from Julie Dodkins

      Wolfpack Digital has skilled expertise [in] creating high-quality work. The team made the process straightforward. Their communication was top-notch. They're readily available and go above and beyond. (Verified via email)

    • Jana Kazmina
      Jana Kazmina Product Manager at Makerist
      5.0 ★

      Mobile App Development Review from Jana Kazmina

      Bounce rate fell and the app received positive reviews from users. Wolfpack Digital was highly accessible via multiple modes of communication and managed the project professionally. They ensured comprehension by asking clarifying questions and demonstrated their flexibility and passion.

    • Valentin Trif
      Valentin Trif Co-founder at Sweed
      5.0 ★

      Mobile App Development Review from Valentin Trif

      The app was launched on schedule and received positive reviews. Wolfpack Digital was highly accessible and effectively managed a changing scope, while still providing multiple options for every decision. Their deep engagement, as well as their flexibility, makes them an ideal partner for startups.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (7)
    4.9 4.9 (31)

  • Elisol

    Forging Digital Visions

    Elisol stands as a dynamic force in the digital realm, driven by a commitment to empowering businesses through innovative solutions...

    Top Services:

    • Mobile App Development
    • Web Development
    • UI/UX Design
    • WordPress Website Design
    • Digital Services
    • Show more
    Location
    Moses Lake, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Elisol Services

    • Mobile App Development
    • Web Development
    • UI/UX Design
    • WordPress Website Design
    • Digital Services
    • Video Production
    • Design Services
    • eCommerce Development
    • SEO
    • Web Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Purcell Compliance Services
    • USDOTApp
    • Purcell Capital
    • Silver Safe
    • Scatter Brainz
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Safztech

    Your Vision Engineered To Perfection

    Safztech is committed to quality, client satisfaction, and measurable results, delivering tailored solutions that elevate brands, enhance user engagement, and drive business growth...

    Top Services:

    • Web Design
    • Web Development
    • Mobile App Development
    • Social Media Marketing
    • Branding
    • Show more
    Location
    Bothell, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr

    Safztech Services

    • Web Design
    • Web Development
    • Mobile App Development
    • Social Media Marketing
    • Branding
    • Graphic Design
    • PPC
    • SEO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • eCommerce Industry
    • Food and Beverage Industry
    • Retail Industry
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

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