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.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Bilberrry
VerifiedVerified by the DesignRush team for authenticity and credibility.AI LeaderRecognized for strong visibility across AI-powered search and answer engines.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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBilberrry Services
Data sourced from the agency's DesignRush profileDeloitte Delta Airlines PepsiCo SEE International Impinj Lockheed Martin OfferUP The Life You Can Save Snohomish County University of Washington
Bilberrry Reviews & Testimonials

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.

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.

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
Chop Dawg
VerifiedVerified by the DesignRush team for authenticity and credibility.AI LeaderRecognized for strong visibility across AI-powered search and answer engines.+1Award WinnerRecipient 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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsChop Dawg Services
Data sourced from the agency's DesignRush profileAlpha 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
Chop Dawg Reviews & Testimonials

Web Development Review from Jimmy Caldwell
Chop Dawg was the strongest development team I’ve worked with in 18 years of software implementation. They took our complex AI-powered senior placement platform and turned it into a functional marketplace with dashboards, business rules, CRM integration, and an AI assistant. The team listened, adapted, communicated often, and treated our vision with real care. The handoff had a few gaps, but overall, they delivered exceptional work.

Design Services Review from Nathan May
Chop Dawg delivered wireframes, high-fidelity screens, a logo, and Figma files while keeping each week’s work clear. They felt like part of our team, brought fresh ideas, and pushed back when needed. The experience was strong overall, though a more detailed final review would have been helpful.

Web Design Review from Anonymous
Chop Dawg turned our early idea for a visual polling and decision-making platform into a prototype we could confidently share with others. It made the product much easier to explain, gave us something real to test with users, and supported more productive investor conversations. The work also helped our team get aligned on the product direction, development scope, and MVP roadmap. Their team was responsive, organized, and easy to work with throughout the process.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAI-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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMobcoder Services
Data sourced from the agency's DesignRush profileCult.fit University of Washington Coinstar Optus Emami Frank Ross Ltd. Unicef Hero Electronix WELSPUN PAPA JOHN'S Professional Beauty Group
Mobcoder Reviews & Testimonials

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.

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!

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 ReviewsDigital Marketing Agency In Seattle
Our vision is to see businesses of all sizes reach their full potential by using modern marketing strategies and that are proven to help scale businesses either in size, reach, revenue, or all three...
Top Services:
- SEO
- PPC
- Digital Marketing
- Web Design
- Web Development
- Show more
- Location
- Seattle, Washington
- Number of Employees
- Under 49
- Average Hourly Rate
- $100/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 4 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsExo Agency Services
Data sourced from the agency's DesignRush profileNameSilo American Academy of CPR & First Aid, Inc. EnGarde® Body Armor COMRAD Pinnacle Foundation Repair Off Leash K9 Trainers Creative Tax Solutions Gargle Water® Rifle Supply Brilliant or BS?
Exo Agency Reviews & Testimonials

Google Ads Review from Birch Medical
ExoAgency did an excellent job helping with our Pay per clicks and Google AdWords management . They are efficient, effective and very aware of the market competition. They played a major role in helping lead our organization to success.,

Web Development Review from Software Developer
We engaged Exo Agency to provide us with SEO, social media marketing, and web development services. Exo Agency has been instrumental in helping our IT company create SEO-friendly websites, meet all of our customer demands, and improve organic rank. Its teamwork and time management have been exceptional, enabling us to consistently deliver high-quality results efficiently. We admire our partner's unbeatable transparency, dedication, and expertise. (Source: 3rd Party Review Platform)

Web Design Review from Eric Olson
I have been working with Exo Agency for almost a year now, I am very pleased at the website we had designed and the services we use regularly! I would recommend talking with Randy if you need web development, advertising (espeically google) or SEO.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWe Make the Impossible Case Possible.
Matellio is a leading software engineering studio, recognized globally for delivering intelligent solutions powered by Artificial Intelligence and Machine Learning. We specialize in developing customized AI solutions tailored to various needs of businesses under different industry verticals...
Top Services:
- AI Development
- IoT
- DevOps Consulting
- Cloud Consulting
- Mobile App Development
- Show more
- Location
- Seattle, Washington
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 26 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMatellio Inc. Services
Data sourced from the agency's DesignRush profileHewlett Packard Enterprise Tracking Genie Brideside Air Fusion vCard Global Codexa PTGI INSPRO NERVVE GoShow
Matellio Inc. Reviews & Testimonials

Web Development Review from Undisclosed
Matellio is one of the best organizations I have had a chance to work with. Their unique approach to becoming an integrated extension of our corporate programming staff provides us with the ability to design and implement solutions in an ever changing environment.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsDesign. Develop. Deploy.
DEV.co builds custom software, web and mobile applications, SaaS platforms, and AI systems for companies that have outgrown the tools they can buy. Senior US engineers, a fixed scope and price agreed before the first commit, and a codebase that belongs to you on day one...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- AI Development
- Web Design
- Show more
- Location
- Seattle, Washington
- Number of Employees
- 250 - 499
- Minimal Budget
- $1,000 - $10,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDEV.co Services
Data sourced from the agency's DesignRush profilePepsi Emoov Monumetric Groupon Salesforce Staples NightCap Taser.com BuyQBall.com GetShowing.com
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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsStrive Enterprise Services
Data sourced from the agency's DesignRush profileGold 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
Strive Enterprise Reviews & Testimonials
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'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)'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 ReviewsBUILD & DEFEND.
nsite.tech is a Bellingham-area web design, application development, and cybersecurity company serving Whatcom County, WA Bellingham, Ferndale, Lynden, Blaine, and Fairhaven. Custom websites you own, business software, and Google-certified security...
Top Services:
- Digital Services
- Web Design
- CRM Consulting
- IT Compliance Solution
- Engineering
- Show more
- Location
- Everson, Washington
- Number of Employees
- Under 49
- Average Hourly Rate
- $350/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsnsite.tech Services
Data sourced from the agency's DesignRush profileCredo Construction Zion Builders MicroSoft EA Quantum Lighting Nugents Market
nsite.tech Reviews & Testimonials
cameron's Review Sourced from Google
Finding a truly skilled app developer Bellingham can be incredibly difficult, but the team at nsite.tech completely shattered our expectations. We needed a complex platform built that required flawless functionality on both iOS and Android, and they delivered exactly what we were looking for.What sets them apart from other tech agencies is their deep understanding of app optimization, API integrations, and user experience. They didn't just write clean code; they took the time to understand our business goals to ensure our app would scale smoothly as our user base grows.If you are a business owner or startup founder looking for an experienced, reliable, and highly communicative app developer in Bellingham, look no further than nsite.tech. They make the development process painless and deliver a premium end product. Highly recommended!
kevin taff's Review Sourced from Google
I cannot say enough good things about the team at nsite.tech. When we first started looking for a Bellingham web designer, we didn't realize how much we also needed a true technical partner who understood the backend architecture of software. They didn't just build us a pretty website—they essentially acted as our custom app developer in Bellingham, creating a completely tailored customer portal that seamlessly syncs with our inventory.The launch was incredibly smooth, our page loading speeds have drastically improved, and our local search visibility is already climbing. They are responsive, highly skilled, and transparent about costs. If you need a premium digital presence, this is the team you hire.
Riley Kennemer's Review Sourced from Google
If you need a platform built smoothly, professionally and correctly, you give these guys a call. Bottomline is they do great work in a timely fashion. Highly recommend.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsResponsive and Beautiful Drupal Websites
We are a compact yet dedicated team of web designers and developers, specializing in tailored design, programming, and Drupal website development. Our focus is on crafting high-quality, aesthetically pleasing Drupal websites that empower our clients. We specialize in constructing well-structured websites that...
Top Services:
- Web Development
- Web Design
- Graphic Design
- eCommerce Development
- Branding
- Show more
- Location
- Battle Ground, Washington
- Number of Employees
- Under 49
- Average Hourly Rate
- $120/hr
- Minimal Budget
- $1,000 - $10,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsWheelercreek Studio Services
Data sourced from the agency's DesignRush profileUnited States Lighthouse Society Quality Matters Xerces Society Oregon Wild Willamette View
Data-driven results to help you crush your competition
We create pathways for your organization to open up new opportunities and drive exceptional growth. Our programs boost revenue, increase profits and grow your bottom line. Contact us. We have the tools and tactics to help you crush your competition...
Top Services:
- Business Consulting
- AI Development
- Digital Services
- Branding
- IT Services
- Show more
- Location
- University Place, Washington
- Number of Employees
- Under 49
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMarket Tactics Services
Data sourced from the agency's DesignRush profileRestoration Builders Restoration Builders Online Roofing School of America Base Fitness NW
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