Top California Generative AI Startups (119)

Monte Carlo is the agent trust platform that unifies data and agent observability to monitor, troubleshoot, and improve production AI systems. As enterprises prepare to deploy thousands of agents across business-critical use cases, Monte Carlo provides the reliability infrastructure to support them along this AI transformation, from human-guided agents to fully autonomous operations. Founded 2019. Backed by leading investors. Trusted...

Hedra is an AI native platform for multimodal creation. The platform is built around their own cutting-edge proprietary video model, Character-3, which is the first multimodal model in production. Alongside Character-3, the platform also brings other leading foundation models into one ecosystem spanning generative images, video, and audio. Prosumer and enterprise users leverage Hedra to generate content ranging from viral...

Founded in 2020 by George Sivulka and backed by Peter Thiel and Andreessen Horowitz, Hebbia powers investment decisions for BlackRock, KKR, Carlyle, Centerview, and 40% of the world’s largest asset managers. Our flagship product, Matrix, delivers industry-leading accuracy, speed, and transparency in AI-driven analysis. It is trusted to help manage over $15 trillion in assets globally. We deliver the intelligence that...

Eve Legal is pioneering the future of legal technology by focusing on AI-driven solutions that empower plaintiff-side law firms. With a robust platform designed for efficiency and effectiveness, Eve leverages artificial intelligence to streamline case analysis, enhance decision-making, and optimize client outcomes. Our mission centers on providing attorneys with the tools needed to stay competitive and navigate the legal landscape...

American medicine is the best in the world. But the American healthcare system is challenged by high administrative costs that burden patients, health systems, and insurance companies with unnecessary expenses. We are focused on addressing those challenges. We use GenAI to improve the most pressing financial pain points in the revenue cycle. We’re one of the first companies to deploy GenAI...

Bellagent is an enterprise-level AI agent platform built to automate everyday business operations with zero-touch integrations that connect instantly to more than 1,300 applications. Launched in 2025 by Proactifi Inc., and headquartered in Chicago, the platform is built for practicality with industry-leading compliance and security standards, enabling organizations to deploy AI agents without friction from day one. Bellagent’s mission to...

Craft illuminates the path to global supply chain resilience. We empower businesses to strengthen their supplier networks and supply chains with the industry's most trusted and comprehensive data fabric and advanced risk mitigation engine. Our easy-to-use platform provides 360-degree visibility to quickly explore and evaluate supplier networks, AI-driven insights to detect and mitigate disruptions, and collaborative tools to optimize supply...

Palo Alto | Small AI Startup | Top Pay, 100% Cash | Actively Hiring Engineers CHAI AI is a small, 20-person AI startup in Palo Alto building a social AI platform, where millions of people create, share, and chat with AI characters. As of September 2026, CHAI has 10 million active users and $100M in annual recurring revenue, and has grown 3x...

Koah is the GenAI Ad Network: Publishers can monetize AI chat without compromising UX — and advertisers can reach high-intent users with 1:1 engagement inside GenAI environments. Native-built for AI, optimized for performance, and backed by Forerunner Ventures and South Park Commons — Koah is the go-to ad network for monetizing GenAI. 📬 Reach out at [email protected] to get started.

Flagright sets the modern standard for AI-native transaction monitoring. The platform enables financial institutions to centralize detection, investigation, and reporting of suspicious activity, streamlining regulatory workflows and strengthening financial crime controls. A high-performance, no-code scenario builder with sub-second API response times powers real-time monitoring, supported by tailored rules, dynamic risk profiling, and simulation tools that reduce false positives and improve...

Our mission is to advance humanity's understanding of AI by examining the inner workings of advanced AI models (or “AI Interpretability”). As a research-driven product organization, we bridge the gap between theoretical science and practical applications of interpretability. We're building critical infrastructure that empowers developers to understand, edit, and debug AI models at scale, ensuring the creation of safer and more...

From custom silicon to intelligent algorithms, we’re breaking through the bottlenecks holding AI back, delivering orders-of-magnitude more performance, anywhere it’s needed. Persimmons, Inc. is on a mission to redefine what’s possible in AI inference computing. We design breakthrough full-stack solutions. From custom silicon to cutting-edge algorithms that shatter today’s performance limits and unlock AI’s true potential. Our next-generation inference platform delivers orders-of-magnitude...

Merge is the leading provider of agentic tools and customer-facing integrations for frontier LLMs, Fortune 500 organizations, and B2B SaaS companies. Our platform offers two core products that solve the most challenging integration problems. With Merge Unified, businesses can add hundreds of integrations to their products through a single API. Instead of building and maintaining each integration in-house, your developers can...

​​Constructor is the only AI product discovery platform designed explicitly for ecommerce retailers. Unlike other product search and discovery platforms, machine learning is in Constructor’s DNA, bringing dynamic personalization to the customer experience. Constructor's cloud-based solutions use natural language processing, machine learning, and collaborative personalization to deliver powerful user experiences across all facets of product discovery—from search to browse, recommendations,...

Guidde is the generative AI platform enabling teams to deliver know-how 11x faster for easy sharing with customers or employees. Market leading companies use Guidde video documentation to answer customer questions, onboard and train employees and drive self-service, enabling teams to perform better.

Ello is a public benefit education technology company building AI-powered learning tools for children. Its products include an AI reading tutor that listens as children read aloud, provides support when they struggle, and creates personalized stories; the company is also expanding toward a broader AI teacher covering reading and math. Ello’s mission is to maximize every child’s potential and democratize...

Typeface is the generative AI application to supercharge personalized content creation for businesses. By uniting content velocity with brand personalization and control, any enterprise can now create exceptional, on-brand content faster and easier than ever before.

Klarity provides an AI-powered solution that revolutionizes accounting and operations by automating complex processes like document review and contract analysis, aiming to make workforces AI-native and transform business processes.

Enabling the next billion AI video creators with Genmo

Promise is an entertainment studio built for the GenAI era, reimagining how visionary artists create film, series, and new forms of storytelling, powered by the world's best Gen AI artists and storytellers.