Top California Generative AI Startups (118)

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...

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...

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...

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...

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...

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...

We’re Kognitos, and we have built an OS for cognition that elevates machines to understand and obey human language. We have built the world’s most advanced combination of Generative AI and Logical execution that will empower most humans to innovate using computers without needing to learn how to program. Our mission is to bring humans out of the dark ages of...

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.

Fireworks.ai offers generative AI platform as a service. We optimize for rapid product iteration building on top of gen AI as well as minimizing cost to serve. https://fireworks.ai/careers

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...

Unlike generic AI, Coworker can answer, plan, and execute tasks for you with full company context across 40+ enterprise apps — no custom coding required.

Make your company AI First The pace of change is accelerating. We help business leaders and founders embed AI-first systems, tools, and talent turning disruption into a competitive advantage.

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...

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...

We are an AI studio creating a personal AI for everyone. Our first AI is called Pi, for personal intelligence, a supportive and empathetic conversational AI. Our studio is made up of the world’s leading AI developers, creative designers, writers and innovators working together to create a brand new class of digital experiences. This is an era of exponential change. Our name...

Twin Labs is a French AI lab backed by Clem Delangue & Thomas Wolf (HuggingFace), Irwan Bello & Romain Huet (OpenAI), Charles Gorintin (Alan, Mistral), Mehdi Ghissassi & Romuald Elie (Deepmind), Yanda Erlich (Weight & Biases), Mathias Gallé (Cohere), and many others. We’re building the first AI that can act as Humans do. Launching soon.

Abaka AI is an AI data company that helps organizations build and evaluate advanced AI systems. It provides end-to-end data lifecycle support, including data collection, curation, cleaning, annotation, model training, and evaluation. Its catalog includes text, audio, image, video, 3D, multimodal, and reasoning datasets, while its platform and services deliver trusted, scalable data solutions for Generative AI, Embodied AI, and...

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.