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

10 Companies - Rankings updated: September 04, 2026

All agencies are evaluated on DesignRush for demonstrated expertise and authentic client reviews to support your decision. Certain placements are paid.

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  • Bilberrry

    Verified Verified by the DesignRush team for authenticity and credibility.

    Award Winning Web Design & Development Agency

    Since 2009, Bilberrry has been producing cross-platform, native, and hybrid mobile apps that drive business growth. With expertise in 24+ technologies, it has delivered custom solutions for clients like BusinessWire, GoFundMe, and Deloitte...

    Top Services:

    • Web Development
    • Web Design
    • Software Development
    • WordPress Website Design
    • eCommerce Development
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Portfolios Count
    19 Projects Listed

    Bilberrry Services

    • Web Development
    • Web Design
    • Software Development
    • WordPress Website Design
    • eCommerce Development
    • UI/UX Design
    • Mobile App Development
    • Product Design
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Deloitte
    • Delta Airlines
    • PepsiCo
    • SEE International
    • Impinj
    • Lockheed Martin
    • OfferUP
    • The Life You Can Save
    • Snohomish County
    • University of Washington
    Data sourced from the agency's DesignRush profile

    Bilberrry Reviews & Testimonials

    • Kelly Johnson
      Kelly Johnson eCommerce Specialist at Rapala VMC
      5.0 ★

      eCommerce Development Review from Kelly Johnson

      Since partnering with Bilberry, we have seen a marked improvement in our websites stability and performance. Their team manages our backlogged issues with such efficiency that our monthly development spend has actually decreased. Estimates are consistently accurate, and we appreciate their proactive communication; if a projects scope evolves, they provide an updated estimate for approval before moving forward. Our monthly sprints are now seamless thanks to their reliable planning and ability to scale resources rapidly to meet even the tightest deadlines.

    • Adam Ely, PMP
      Adam Ely, PMP Director of Operations at Sands Investment Group
      5.0 ★

      Web Development Review from Adam Ely, PMP

      As Director of Operations at Sands Investment Group, I partnered with Bilberrry to lead the redesign and rebuild of our website, enhance our marketing operations, and streamline internal workflows. We chose Bilberrry for their strong technical capabilities, cultural alignment, and outstanding reputation. The project followed a well-structured four-phase process: discovery, design, development, and launch. From the beginning, Bilberrry took a strategic and collaborative approach, conducting workshops and technical audits to define a scalable architecture and intuitive user experience. Their team went on to create custom designs for more than 20 pages, build a flexible design system, and ensure the site met key standards for SEO and accessibility. On the development side, they customized a robust content management system tailored to our needs, incorporating dynamic listing features such as saved searches, email alerts, and early-access content for select users. The new site also connected seamlessly with our internal tools, enabling greater efficiency and automation across teams. The impact was immediate and significant: we saw a dramatic reduction in manual processes. Our team is now better equipped to manage content independently, while the platform itself is built for long-term scalability and performance. Throughout the process, Bilberrry was responsive, professional, and incredibly easy to work with. They communicated clearly, incorporated feedback quickly, and consistently brought thoughtful, strategic ideas to the table. Bilberrry's unique blend of strategic insight, technical depth, and design acumen made them an invaluable partner in creating a high-performing, visually polished digital platform tailored to our business.

    • Ari Bixhorn
      Ari Bixhorn VP, Marketing at Outpost
      5.0 ★

      Web Design Review from Ari Bixhorn

      Bilberrry’s work gave our new website improved performance, greater SEO flexibility, and pages that are much easier to build. They delivered everything on time and kept communication proactive throughout. Their strong project management, technical expertise, and responsiveness built real trust during the process.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.9 4.9 (28)

  • Chop Dawg

    Verified Verified by the DesignRush team for authenticity and credibility. Award Winner Recipient of a Best Design Award for outstanding work.

    Meet The Partner Behind Your App's Success | Make It App'n!

    Meet your award-winning app development team, dedicated to turning your vision into scalable and profitable digital apps and software...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    52 Projects Listed

    Chop Dawg Services

    • Mobile App Development
    • Software Development
    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • UI/UX Design
    • Software Testing
    • Wearables
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Alpha Paw
    • Big Brothers Big Sisters
    • Choice Home Warranty
    • City of Peachtree Corners, Georgia
    • City of Philadelphia, Pennsylvania
    • City of Springboro, Ohio
    • CRBO
    • FlynnO'Hara
    • Hilton
    • Innovative
    Data sourced from the agency's DesignRush profile

    Chop Dawg Reviews & Testimonials

    • Malik Boyd
      Malik Boyd Co-Founder at GyftMasters
      5.0 ★

      Mobile App Development Review from Malik Boyd

      Chop Dawg helped us turn our gifting app concept into a working prototype, handling wireframes, UI design, coding, data storage, and automation from scratch. Their team has been transparent, proactive, and highly responsive throughout the process. They provide clear schedules, flag issues early, and keep us informed at every stage. We’ve been very happy with the prototype so far and are excited to move into full iOS and Android development.

    • Anonymous
      Anonymous Founder at Cuddlebids
      5.0 ★

      Mobile App Development Review from Anonymous

      Chop Dawg took our iOS app from concept to launch, handling design, development, AWS, and App Store requirements. Their team was responsive, practical, and highly supportive throughout the process. They also stayed involved after launch with updates and fixes, and even helped promote the app through their network. Their support contributed to strong early growth and helped position the company for a later acquisition.

    • Anonymous
      Anonymous Executive at Undisclosed
      5.0 ★

      Web Design Review from Anonymous

      Chop Dawg supported us with UX/UI design for a new fintech web application. They took the time to understand our users, product requirements, features, and overall vision before moving into design. Over a 6 to 7 week engagement, their team shared regular Figma reviews, incorporated feedback quickly, and stayed highly responsive. They finished ahead of schedule with no budget issues, and the internal response to the final designs has been very positive. Their attention to detail, professionalism, and ability to keep the process organized made them very easy to work with.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.9 4.9 (72)
    4.8 4.8 (76)

  • Zazz

    Modern IT. Built Secure. Delivered Right.

    Zazz uses an architecture-first, risk-aware, and outcome-driven development approach to produce 800+ cross-platform and native applications and accelerate time-to-value by 40%. Its services cover app development, design, audit, testing, modernization, and maintenance...

    Top Services:

    • Mobile App Development
    • IT Services
    • Software Development
    • Staff Augmentation
    • IT Compliance Solution
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    250 - 499
    Average Hourly Rate
    $45/hr
    Portfolios Count
    36 Projects Listed

    Zazz Services

    • Mobile App Development
    • IT Services
    • Software Development
    • Staff Augmentation
    • IT Compliance Solution
    • Cybersecurity
    • Managed Services
    • Cloud Consulting
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • JP Morgan
    • BBC News
    • PayPal
    • Harvard Innovation Labs
    • HBO
    • Jeddah Season
    • McDonald's
    • NBA
    • Honda
    • Citibank
    Data sourced from the agency's DesignRush profile

    Zazz Reviews & Testimonials

    • Sam Zaid
      Sam Zaid CEO at Getaround
      5.0 ★

      Mobile App Development Review from Sam Zaid

      Their team's technical proficiency and creativity have significantly contributed to the success of our world's first connected carsharing marketplace. Zazz not only met but exceeded our expectations, delivering a seamlessly integrated and user-friendly mobile app that has truly empowered people to carshare everywhere. The collaboration with Zazz has proven to be a valuable partnership, marked by open communication, timely delivery, and a genuine dedication to our mission.

    • Jay Thrash
      Jay Thrash SENIOR IOS DEVELOPER at Epic Games
      5.0 ★

      Mobile App Development Review from Jay Thrash

      Their unparalleled expertise and dedication to excellence were evident throughout the entire collaboration. Zazz's team consistently demonstrated a deep understanding of our vision, translating it into a seamless and innovative mobile application. Their commitment to quality and precision in every aspect of the development process was truly impressive. Zazz's ability to navigate complex challenges with agility and deliver solutions that exceeded our expectations was instrumental in the success of our project.

    • Don Harmon
      Don Harmon Director of Global IT Services at Dorel Juvenile
      5.0 ★

      Mobile App Development Review from Don Harmon

      Zazz's commitment to delivering a high-quality mobile app for Dorel Juvenile was evident throughout the entire development process. The team consistently communicated progress, promptly addressed any concerns or modifications, and ensured that the final product not only met but exceeded our expectations. The mobile app developed by Zazz not only showcased cutting-edge technology but also reflected a deep understanding of the child-centric focus that Dorel Juvenile upholds.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (76)

  • Mobcoder

    AI-Native, Business-Ready Development Services. Engineered to Scale

    At Mobcoder AI, certified engineers and data scientists help you identify high-ROI AI use cases and operationalize them at scale. With 150+ deployments, CMMI Level 3 certification and 12+ years of experience, we build AI solutions governed by design and model-agnostic frameworks...

    Top Services:

    • Mobile App Development
    • AI Development
    • Software Development
    • Web Development
    • VR/AR
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    100 - 249
    Average Hourly Rate
    $55/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    14 Projects Listed

    Mobcoder Services

    • Mobile App Development
    • AI Development
    • Software Development
    • Web Development
    • VR/AR
    • Staff Augmentation
    • IoT
    • Wearables
    • Design Services
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Cult.fit
    • University of Washington
    • Coinstar
    • Optus
    • Emami Frank Ross Ltd.
    • Unicef
    • Hero Electronix
    • WELSPUN
    • PAPA JOHN'S
    • Professional Beauty Group
    Data sourced from the agency's DesignRush profile

    Mobcoder Reviews & Testimonials

    • Ousmane Ouane
      Ousmane Ouane VP Product & Business Development at Sportstech Brands Holding GmbH
      5.0 ★

      Mobile App Development Review from Ousmane Ouane

      End to End Development of multiple mobile and IoT applications, including APK and SDKs for fitness devices and much more. Successful release of apps, development of SDK and APK for fitness devices, and onboarding of thousands of Sportstech customers. Mobcoder was easy to work with, professional, and committed. It was a joy to work with them.

    • AJ Greenberg
      AJ Greenberg Co-founder at Biograph
      5.0 ★

      Mobile App Development Review from AJ Greenberg

      Mobcoder is a great team to work with. They are professional, responsive, and able to execute any of your development needs. We've worked with several different developers on the team and they all have exceptional character. Definitely recommend working with them!

    • Brandon Straza
      Brandon Straza Founder at The Success Finder
      5.0 ★

      Software Development Review from Brandon Straza

      Mobcoder has been amazing to work with. Their communication as well as their follow through is unlike any other team we've worked with to develop our platform. They were prompt, thought for themself, and brought us their own ideas as well. They worked side by side throughout the entire process. We look forward to a continued relationship moving forward.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.9 4.9 (15)
    4.9 4.9 (11)

  • Sam's Solution

    Software Application Masters.

    Sam's Solution is a dynamic software company specializing in custom software, web and mobile app development, IT consulting, and digital transformation. We deliver innovative, tailored tech solutions that help businesses streamline operations, boost efficiency, and achieve their strategic goals...

    Top Services:

    • Mobile App Development
    • Web Development
    • AI Development
    • Digital Marketing
    • eCommerce Development
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Portfolios Count
    8 Projects Listed

    Sam's Solution Services

    • Mobile App Development
    • Web Development
    • AI Development
    • Digital Marketing
    • eCommerce Development
    • Graphic Design
    • SEO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Oui Meet
    • YEP Nation
    • MindHealth Psychological Services
    • Pill Locker
    • Eddipanion LTD.
    • Moneylit
    • Nexsoft Technology Ltd.
    • Fleetwood Specialty Pharmacy
    • Bhawani Properties & Developers
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Velosys

    Where Windows Apps Fuel Smart Business Solutions

    Velosys is a leading technology consulting firm specializing in Windows App Development, offering tailored software solutions for major clients in financial services, energy, and the Federal Government, including the Department of Defense...

    Top Services:

    • Mobile App Development
    Location
    Poulsbo, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $150/hr

    Velosys Services

    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Marketing Industry
    • Advertising Industry
    • IT Industry
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Strive Enterprise

    Lets Grow Online

    Strive Enterprise is the ultimate solution for impactful web design, custom digital marketing solutions, and professional SEO services...

    Top Services:

    • Web Design
    • SEO
    • Digital Marketing
    • Web Development
    • WordPress Website Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    10 Projects Listed

    Strive Enterprise Services

    • Web Design
    • SEO
    • Digital Marketing
    • Web Development
    • WordPress Website Design
    • PPC
    • CRO
    • Mobile App Development
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Gold Medal Service
    • Jamms Restaurant
    • Addiction Sticks
    • OA Wild Game
    • IUSI Immigration Services
    • Gema Henao Hair Studio
    • Ari Perez Beauty Studio
    • Harmony Turbines
    • Andreas Bridal Alterations
    Data sourced from the agency's DesignRush profile

    Strive Enterprise Reviews & Testimonials

    • RockERO y corvichERO
      RockERO y corvichERO Review from Google
      5.0 ★

      RockERO y corvichERO's Review Sourced from Google

      I’ve been researching and looking at their past work, they’re truly professional. Even though they’re pricey, I value them highly.

    • David Galvez
      David Galvez Review from Google
      5.0 ★

      David Galvez's Review Sourced from Google

      I had a very informative meeting with Cesar. He was very professional and provided a lot of details on their services. I will be including them in my marketing process.

    • Brandon Howard (Sin City Parties)
      Brandon Howard (Sin City Parties) Review from Google
      5.0 ★

      Brandon Howard (Sin City Parties)'s Review Sourced from Google

      Ana, Jose, or Cesar are the best! They totally transformed my business website. I trust them completely and the results are incredible. Our website has never looked better. If you ever need help with anything, they’re your guys. They’re quick and responsive, and they’ll get you the answers and website you need. I would recommend them to everyone.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (360)

  • Soft Does

    Custom Software That Works In The Real World

    SoftDoes builds custom software, AI, and web applications for mid-market companies that need enterprise-grade results without the overhead of an in-house team. U.S.-based leadership. Full IP ownership. No lock-in...

    Top Services:

    • Software Development
    • AI Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $75/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    1 Project Listed

    Soft Does Services

    • Software Development
    • AI Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Cloud Consulting
    • Blockchain
    • Software Testing
    • Digital Strategy
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Altera
    • Brizacorp
    • Color and Harmony
    • FMY Orthodontics
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • UKAD-group

    Build a team you can rely on!

    Development services delivered with a personal approach...

    Top Services:

    • Software Development
    • Web Development
    • Mobile App Development
    Location
    Seattle, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $30/hr
    Portfolios Count
    3 Projects Listed

    UKAD-group Services

    • Software Development
    • Web Development
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • BandaPixels
    • POS Financial Services
    • FlexMade
    • Sweetpay Spa
    • Reviso
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • PIT Solutions

    Turn Your Digital Dreams Into Reality

    PIT Solutions is a technology-driven digital services provider with a people-first culture and a proven track record of delivering impactful solutions...

    Top Services:

    • Web Development
    • UI/UX Design
    • IT Services
    • Managed Services
    • Mobile App Development
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    500 - 999
    Average Hourly Rate
    $35/hr

    PIT Solutions Services

    • Web Development
    • UI/UX Design
    • IT Services
    • Managed Services
    • Mobile App Development
    • Big Data Analytics
    • AI Development
    • Web Design
    • eCommerce Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Unihockeyshop
    • Eberhard & Co.
    • Bibus AG
    • Sharjah Police
    • Groupe Looping
    Data sourced from the agency's DesignRush profile

    PIT Solutions Reviews & Testimonials

    • ASHISH GEORGE
      ASHISH GEORGE Review from Google
      1.0 ★

      ASHISH GEORGE's Review Sourced from Google

      I had a bad experience with the HR Sneha S. Taken all the round of interviews and later told that my profile was kept on hold. In the JD it was given as immediate joiner. Later after one month the same HR post same opening. By seeing this I mailed HR keeping her seniors. The moment itself she called me back and saying that still my profile is on hold. I don't understand the logic. Earlier I was trying to reach out and she was not picking my call. Would have appreciated if she could have told that the profile is rejected. Same as the organization expecting Professionalism from candidate, they too expect transparency from the organization. In most of the organization HR like Sneha S is a curse.

    • adharsh .k
      adharsh .k Review from Google
      1.0 ★

      adharsh .k's Review Sourced from Google

      listen up! This old-school interview style is just plain archaic. Seriously, who still tests candidates' memory these days? Wake up and smell the coffee! Technology has evolved light years ahead. We're not in the Stone Age anymore! You don't need to cram every single line of code or concept. What matters is getting the job done with clean, efficient code. Get with the times!

    • Sumesh T K
      Sumesh T K Review from Google
      5.0 ★

      Sumesh T K's Review Sourced from Google

      It's been close to a decade with PIT Solutions, and I truly cherished the quality time I spent here. PITS offers a healthy work-life balance, excellent work culture and a politics-free environment. The Management is very supportive and promotes an open door policy. PITS is an idle place for budding talents to learn and grow their skill-set. And for experienced professionals, it's a platform to showcase their skills and broaden their horizons. I would recommend PIT Solutions to anyone without any second thought.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.5 4.5 (153)

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