Top Tech Startups in California, US in 2026

Trunk is an a16z backed startup founded by a team of senior and staff engineers from Uber and Google. From first-hand experience, we knew that top tech companies rightly treated developer experience as a mission-critical competitive investment. But hiring full-time developer tools and developer experience teams, as the biggest companies do, isn’t a scalable solution. From one-person hobby projects to 800-person engineering juggernauts, we’re building the rock-solid tooling solution every team needs. Maintaining development velocity is impossible when you’re constantly babysitting pull requests. Putting your product roadmap on hold to triage a sick repo shouldn’t be a regular occurrence. Because the treatment for death by a thousand paper cuts isn’t a thousand band-aids. Enter Trunk. No, we didn’t invent trunk-based development—but we’re here to accelerate it.

Fama is the innovator in online screening that makes hiring great people easy. Combining Fama’s groundbreaking AI technology and ability to integrate across the HR Tech stack, the solution compliantly searches over 10,000 online public sources to help companies avoid workplace misconduct, prevent costly legal action and ultimately, make better decisions. By modernizing candidate screening and due diligence, Fama helps organizations, agencies, and investors improve the quality of hires, make the most of each investment and build successful businesses. Headquartered in Los Angeles, CA, Fama has raised over $30M and is backed by some of the world’s leading venture capitalists and institutional investors. We’re FCRA, EEOC, and SOC2 compliant, and integrate with major HRIS, ATS, and background check solutions. To learn more, visit Fama.io.

Our software helps business owners save on taxes with two core products: Corvee Tax Planning – Finds ways to cut down on taxes (Demo at corvee.com). Instead Implementation & Preparation – Simplifies tax rules for small businesses (Live at instead.com). Note: We are in process of rebranding from Corvee to Instead.com. The main product you will be working on will be at instead.com

Frame is the missing link on the family-building journey. Frame’s concierge model extends the care of in-person clinics by providing patients with 1:1 personalized support, telemedicine and coaching. Inspired by the challenging fertility journey of its wife/husband co-founders, Jessica and Corey, Frame was built alongside women’s health and fertility experts to improve patient and clinician satisfaction, operational efficiency and clinical outcomes.

HealthVerity synchronizes transformational technologies with the nation’s largest healthcare and consumer data ecosystem to power previously unattainable outcomes and fundamentally advance the science. We offer a comprehensive, yet flexible approach, based on the foundational elements of Identity, Privacy, Governance and Exchange (IPGE), that synchronizes unparalleled Identity management with built-in Privacy compliance and Governance, providing the ability to discover and Exchange a near limitless combination of data at a record pace. Together with our partners in life sciences, government and insurance, we are Synchronizing the Science. To learn more about HealthVerity, visit healthverity.com.

Feeld is a dating app for the curious; for those open to experiencing people and relationships in a new way. Our mission is to elevate the human experience of sexuality and relationships and create a world where everyone is more intimately connected to each other and themselves.

Tracevision is a cutting-edge AI video analytics company revolutionizing the way businesses leverage video data. Our innovative solutions provide advanced insights into customer behavior, security, and operational efficiency across industries like retail, security, manufacturing, and more. By seamlessly integrating with existing video infrastructure, we enable businesses to proactively detect threats, optimize performance, and uncover valuable trends. At Tracevision, we are driven by a passion for innovation and a commitment to helping our clients solve complex problems through AI-powered technology. Join our dynamic team and help shape the future of video intelligence.

Perfect Venue is an AI-powered event management and booking platform designed specifically for restaurants and venues. It streamlines the entire private event sales process — from handling inquiries and managing availability to sending proposals, collecting payments, and closing deals. By combining smart automation with a marketplace that helps venues attract new customers, Perfect Venue helps restaurants save up to 48 hours per month, increase event revenue by 45%, and deliver a better experience for guests searching for the perfect space. With a fast-growing customer base and proven unit economics, Perfect Venue is positioned to become the end-to-end solution for the $100B private event market.

DecisionNext is the only native AI solution built specifically for buyers and sellers of commodity products. DN's SaaS software helps maximize profit margins and minimize risk. DN pushes buying transactions into the troughs in a volatile price environment, and does the opposite with selling transactions. It also provides a clear audit trail of exactly how prices were set. DN has patents awarded and pending for its method of incorporating users' market knowledge into its models. DecisionNext is helping commodity product buyers and sellers achieve similar profit margin gains to those created by applying deep analytics to several other industries, including airline, retail, high tech, pharmaceuticals, aerospace and logistics.