Top California App Development Startups (84)

As the trusted choice for digital agencies, SaaS platforms, and web professionals, Duda powers over 1 million websites worldwide. Our platform offers a comprehensive suite of tools that enable users to efficiently create pixel-perfect, feature-rich websites at scale.

Doodle Labs designs and produces industrial-grade wireless networking solutions. The company focuses on mesh networking for robotic systems, providing high throughput, long-range Mesh Rider solutions for UAVs, UGVs, AMRs and other robotic applications. The company’s Helix Mesh Rider Radio was developed with sponsorship from DIU and is the Blue UAS program’s datalink of choice. Doodle Labs was named one of Fast...

Sortly is the simplest inventory platform for business and teams to stay on top of their stuff. Our visual system enables business to easily track what they have, where it is, and who has it. Anytime, anywhere, on any desktop, tablet or mobile device. Sortly is trusted by tens of 1000’s of small businesses and teams at large enterprises including HP, Honeywell,...

Artic is passionate about people and impact, delivering global consulting services that provide solutions by understanding the business need, pulling an incredible team together, then executing and delivering amazing results. Currently, Artic specializes in Business Management Services, Custom Application and Systems Engineering, and Data and Business Insights.

We’re a Digital Product Agency you can grow with, globally recognized as a Top Flutter development company. We design, build, and scale digital products by combining strong product strategy, thoughtful design, and solid engineering. With 95+ experts, we build products for any screen: mobile, web, desktop, and embedded devices, always focusing on scalability, performance, and long-term maintainability. As a company focused on...

Shorebird is a developer-tools company that makes it easier for businesses to build, ship, and operate mobile applications with Flutter. Our flagship product, Code Push, enables safe over-the-air updates for Flutter apps—allowing teams to fix bugs, ship features, and respond to issues without waiting for app store approval. We're expanding our platform to support more of the Flutter development lifecycle,...

The AI-native developer intelligence platform that connects the dots between your data and the context you need to drive more impact.

MojoTech is a 100% US-based software development company that integrates strategy, engineering, and design to create results-driven digital products and experiences. We've written the playbook for how to discover, define, design, and build tomorrow's innovations, empowering companies to unlock future market potential, maximize returns on innovation, and drive transformational change.

Appentus Technologies is an IT company specializing in custom mobile app and website development services. Acting as a dedicated digital partner on a mission to bring innovation to life, they provide comprehensive solutions to help businesses grow, including web and app development and social media marketing. They leverage a team of technology experts to deliver high-quality digital transformations for businesses...

FAR.AI is a technical AI research and education non-profit, dedicated to ensuring the safe development and deployment of frontier AI systems. FAR.Research: Explores a portfolio of promising technical AI safety research directions. FAR.Labs: Supports the San Francisco Bay Area AI safety research community through a coworking space, events and programs. FAR.Futures: Delivers events and initiatives bringing together global leaders in AI academia, industry...

Create successful apps and websites through chat — on a safe open tech stack for AI that rolls back limits

At SmartCookie.App, our mission is simple: to keep kids engaged in learning and self-motivated to pursue ongoing education. We accomplish this through an innovative approach to parental controls that uses kids’ desire to access online entertainment to drive their learning.

WorkWhile is an AI-powered next generation labor platform that helps businesses in light industrial, hospitality, and events achieve over 90% fill rates and reduce no-shows through AI and predictive machine learning. We ensure seamless shift execution with trained, on-demand workers supported by on-site leads, real-time performance monitoring, and a robust accountability system. Our worker-first model boosts retention through benefits like...

Paybotx is a rapidly growing financial technology and merchant services company dedicated to helping businesses accept payments more efficiently while providing the tools they need to operate and grow. We partner with businesses of all sizes across the United States to deliver customized payment processing solutions, point-of-sale (POS) systems, payment gateways, eCommerce integrations, virtual terminals, mobile payment solutions, and business...

1stMILE (formerly Merchant Partners) is a software technology company based in Redmond that provides a consumer driven commerce platform to businesses in the automotive marketplace. We have more than 12,000+ locations using our 1stMILE software to process payments and increase revenue via our integrated solutions.

Founded in 2013 in San Francisco, MobileAction is a pioneer in app analytics and the growth partner of apps and games for organic and paid user acquisition. It is the go-to platform for app marketers aiming for the top charts on the App Store and the Google Play Store, trusted by industry giants like Meta, Square, Zalando, Playtika, and Adidas. MobileAction...

Moburst is a full-service mobile-first digital agency that propels companies into category leaders through AI-powered marketing. Our methodology is driven by a proprietary AI program, with dedicated experts embedded in every department to pioneer intelligent solutions that deliver unparalleled client growth. Trusted by global leaders from startups to enterprises like Google, Uber, Samsung, and Reddit, we deliver end-to-end results across the...

Blink UX is a global product design consulting firm creating products and experiences people use, love, and remember. Blink has over two decades of experience in UX research, strategy, and design, partnering with innovative industry leaders, including Amazon, JPMorgan Chase, Google, Meta, The New York Times, and NASA.

Create compliant healthcare apps quickly Medplum is a powerful, open source healthcare data platform built by industry veterans.

6sense HQ Limited is an offshore software development company that provides dedicated development teams, staff augmentation, and custom software solutions for startups and businesses. The firm builds web and mobile applications, MVPs, AI agents, and IoT integrations using Agile delivery and rapid onboarding. Headquartered in Dhaka, Bangladesh, it serves international clients with structured offshore teams and end-to-end product delivery.