Top 60 Cross Platform App Developers in Seattle
The Best of December 2025Looking for a top cross platform mobile app development company in Seattle?
Cross-platform mobile applications have benefits that outweigh those of native applications if your users interact with your business on both Android and Apple products. Cross platform app development entails building a mobile app that’s compatible with multiple operating systems. Cross-platform, or hybrid apps, use a single codebase, which means you don’t need separate apps with separate technologies to appeal to customers using Android or iOS. Because of this single codebase, cross platform apps are less costly to create and maintain.
Most hybrid apps will use either Ionic or React as a development framework. React is a JavaScript framework that allow apps to support Android and iOS natively, while Ionic uses JavaScript, HTML5, CSS, and Sass for hybrid apps, desktop apps, and progressive web apps. Choosing an app developer with the right skillset to fit the technology framework your app needs is a good place to start when interviewing app development companies.
To assist you in your search for a partner, we’ve compiled this list of the top cross platform app developers in Seattle. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Seattle Cross Platform Mobile App Development Companies
-
1$1,000+10 - 49 employeesSeattle, WAChopDawg.com is an application development firm. Their small team is located in Philadelphia, Pennsylvania; Smyrna, Georgia; Seattle, Washington and Boston, Massachusetts. The company specializes in Mobile App Development and Web Development. The company was launched in 2009.Read More
Clients
Alpha Paw Big Brothers Big Sisters Choice Home Warranty City of Peachtree Corners, GeorgiaIndustries
-
2$10,000+50 - 249 employeesSeattle, WAMobile app development firm 9series Inc is headquartered in Bellevue, Washington; Ahmedabad, India and Seattle, Washington. They focus on Mobile App Development, Artificial Intelligence, Web Development, and Low/No Code Development and were founded in 2014.Read More
Industries
-
3$100,000+250 - 999 employeesSeattle, WAMatellio is a San Jose, California-based mobile application development firm. The midsize team provides Mobile App Development, IT staff augmentation, Web Development, IoT development, and more and was established in 2014.Read More
Clients
StartupsIndustries
-
4$50,000+50 - 249 employeesSeattle, WAThirstySprout is an IT staff augmentation company. They are based in Seattle, Washington; San Francisco, California; Austin, Texas and Buenos Aires, Argentina and have a midsize team. The company provides IT staff augmentation, Generative AI, Custom Software Development, Web Development, and more.Read More
Clients
Rover.comIndustries
-
5$50,000+250 - 999 employeesKyiv, UkraineLocated in Tallinn, Estonia; Kharkiv, Ukraine; Stuttgart, Germany and London, England, Jelvix is a software development company. The midsize agency was established in 2011. Their services include Custom Software Development, Mobile App Development, Artificial Intelligence, and cloud consulting & SI.Read More
Clients
Tiber Capital GroupIndustries
-
6$5,000+10 - 49 employeesStockholm, SwedenRead More
Slashdev is a small custom software development firm based in Winter Park, Florida; London, England; Stockholm, Sweden and San Diego, California. They specialize in Custom Software Development, Web Development, Mobile App Development, IT staff augmentation, and more and were founded in 2020.
Industries
-
7$25,000+50 - 249 employeesSeattle, WAMobcoder, an IT staff augmentation company, is located in Seattle, Washington; Cobham, England; Ghaziabad, India and Burnaby, Canada. The midsize company was launched in 2014. Their services include IT staff augmentation, Artificial Intelligence, UX/UI Design, BI & big data consulting & SI, and more.Read More
Clients
General millsIndustries
-
8$10,000+50 - 249 employeesKirkland, WARead More
Founded in 2013, AccelOne is an artificial intelligence firm. They are headquartered in Kirkland, Washington; Buenos Aires, Argentina and Mission Viejo, California and have a midsize team. The firm offers Artificial Intelligence, Generative AI, IT managed services, IT staff augmentation, and more.
Clients
XapoIndustries
-
9$25,000+10 - 49 employeesMedina, WAFlower Press Interactive is a small user experience agency launched in 2001. Their team offers UX/UI Design, Mobile App Development, Custom Software Development, Web Development, and more. The company is located in Medina, Washington.Read More
Clients
Insurance LoungeIndustries
-
10$5,000+50 - 249 employeesSeattle, WAWeb design agency UPQODE was launched in 2015. They are based in Nashville, Tennessee; New York, New York; Tampa, Florida and Seattle, Washington and have a midsize team. UPQODE focuses on Web Design, Web Development, UX/UI Design, Custom Software Development, and more.Read More
Clients
Gracenote - Entertainment ProvidersIndustries
-
11$25,000+10 - 49 employeesDallas, TXLaunched in 2015, Groove Jones is an AR/VR development company. Their small team is based in Dallas, Texas; Minneapolis, Minnesota; West Hollywood, California and Chicago, Illinois. Their team provides AR/VR development, Artificial Intelligence, Web Development, Mobile App Development, and more.Read More
Clients
3M AT&T American Heart Associaiton Charles SchwabIndustries
-
12$25,000+10 - 49 employeesSeattle, WARead More
UpTop is a small UX company. Founded in 2000, the team offers UX/UI Design, Custom Software Development, and Mobile App Development. The firm is based in Seattle, Washington.
Clients
Amazon F5 SAP Concur LogitixIndustries
-
13$10,000+2 - 9 employeesSeattle, WAMontana Banana Web & Mobile Development + Design is an Ecommerce Marketing company based in Seattle, Washington. The small team offers Ecommerce Marketing, Conversion Optimization, Web Design, Web Development, and more and was founded in 1996.Read More
Clients
ESS Eye ProIndustries
-
14$5,000+50 - 249 employeesSeattle, WAHeadquartered in Seattle, Washington; Yerevan, Armenia and Almaty, Kazakhstan, Innova is a big data analytics company. The midsize agency was established in 2021. Their services include BI & big data consulting & SI, cloud consulting & SI, IT managed services, Custom Software Development, and more.Read More
Industries
-
15Undisclosed50 - 249 employeesSeattle, WARead More
Smashing Ideas is a mobile app development company that offers an array of services such as UI/UX design, web design, data strategy and analytics, and quality assurance and testing. Since its founding in 1996, Smashing Ideas has grown to over 50 employees who are passionate, curious, and creative.
Clients
ReachNow -
16$50,000+10 - 49 employeesSeattle, WARead More
New Normal, founded in 2012, is a software services agency headquartered in Seattle. Their company consists of a team of 22 people who specialize in web development, mobile app development, and e-commerce development. While they mostly work with mid-market businesses, they also work with enterprise and small businesses. The businesses they work with are mostly in the advertising & marketing, e-commerce, and financial services industries.
Clients
AmazonIndustries
-
17$5,000+10 - 49 employeesBellevue, WARead More
Scalex Technology Solutions is a digital agency founded in Bellevue, Wash. in 2015 with fewer than 50 employees. They specialize in cloud consulting, mobile app development, and custom software development for clients in the fields of education, financial, and IT services.
Clients
World VisionIndustries
-
18$25,000+10,000+ employeesKraków, PolandPersistent Systems is a data analytics company. Established in 1990, the large agency is headquartered in Pune, India; Santa Clara, California; Paris, France and Lyne, England. Their services include BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, Custom Software Development, and more.Read More
Industries
-
19Undisclosed50 - 249 employeesSeattle, WANTSprint LLC is a software development company. They are located in Seattle, Washington and have midsize team of experts. Their services include Custom Software Development and Web Development.Read More
Industries
-
20$1,000+10 - 49 employeesSeattle, WARead More
Commerce9 FZCO is an e-commerce development firm. They are in دبي, United Arab Emirates and Kochi, India and have a small team. Their services include e-commerce development, cloud consulting & SI, and mobile app development. The company was established in 2019.
Industries
-
21$25,000+2 - 9 employeesSeattle, WACodble is a Seattle, Washington-based application development firm. Founded in 2020, the small team offers Mobile App Development, Custom Software Development, Web Development, IT strategy consulting, and more.Read More
-
22$5,000+10 - 49 employeesSeattle, WALaunched in 2017, Fenyx Studio is a mobile app development company. The small team specializes in Mobile App Development and Web Development.Read More
Industries
-
23$5,000+10 - 49 employeesKirkland, WARead More
Based in Kirkland, Wash., ITIRRA is a boutique technology consulting firm. Since 2008, their team of 12 has been specializing in web development, mobile app development, IT strategy consulting, and more.
Clients
Sports Aptitude -
24$25,000+2 - 9 employeesBainbridge Island, WABased in Bainbridge Island, Washington, Apsis Labs is a small web design company. They offer Web Design, UX/UI Design, Web Development, Mobile App Development, and more and were launched in 2014.Read More
Industries
-
25$1,000+10 - 49 employeesSeattle, WATekByt LLC is a web design agency established in 2024. They are in Seattle, Washington and have a small team. Their services include Web Design, UX/UI Design, Custom Software Development, Web Development, and more.Read More
Industries
-
26$10,000+10 - 49 employeesSeattle, WARead More
Helpful Human is a development agency based in Seattle. Since 2013, their team of 15 has been specializing in web design and development, mobile app development, and UX/UI design. They work primarily with small businesses in the information services and business services industries.
Clients
Rudy'sIndustries
-
27$5,000+2 - 9 employeesBurien, WASandcastle Web Design and Development is a software development company established in 1998. The team specializes in Custom Software Development and Mobile App Development.Read More
Clients
Aviation Supplies & Academics Cevala / Brandvia Allegiant Commercial Asset Services GroupIndustries
-
28$10,000+10 - 49 employeesSeattle, WAPalador is a small custom software development firm headquartered in Seattle, Washington and Yogyakarta, Indonesia. Their services include Custom Software Development and Enterprise App Modernization.Read More
Industries
-
29$100,000+50 - 249 employeesSeattle, WALaunched in 2000, Carbon Five is a custom software development company. Their team specializes in Custom Software Development and Mobile App Development.Read More
Industries
-
30$10,000+50 - 249 employeesSeattle, WADevblock is a software development company. Based in Seattle, Washington and Ho Chi Minh, Vietnam, the company offers Custom Software Development and Web Development.Read More
Industries
Get connected with a company for free
Tell us about your project, and we'll match you with vetted companies that meet your requirements.
Get connected with the right company for you
We'll do the work for you – finding and connecting you with service providers that meet your exact requirements.
Schedule Consultation