Top California Generative AI Startups (105)

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...

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...

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...

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...

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...

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.

Creating revolutionary open-ended conversational applications through breakthrough research.

Parakeet Health is building the AI-powered operating system for medical practices. Today, healthcare runs on phone calls, faxes, and manual labor, and everyone feels it. Practices burn through staff juggling inbound calls, chasing referrals, and filling last-minute cancellations, while patients sit on hold, wait weeks to hear back, and fall through the cracks when overloaded teams can't keep up. Our conversational...

​​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,...

Unlearn is advancing AI to eliminate trial and error in medicine, starting with reinventing clinical trials for the 21st century. We create AI-generated digital twins of individual trial participants that are forecasts of their future health outcomes. Digital twins of participants are used to run smaller, more efficient clinical trials that help bring new treatments to patients sooner.

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

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.

We empower districts with accredited middle and high school original credit, credit recovery, and multilingual courses that meet the needs of today’s learners and educators. Our platform was built from the ground up based on extensive feedback from educators and team members who understand firsthand the challenges of teaching today's digital-native students. Teachers told us they needed better ways to...

Hugging Face is the leading open platform for AI builders. For researchers, Hugging Face is the place to publish models and collaborate with the community. For data scientists, it’s where you can explore over 300k off-the-shelf models for any machine learning task and create your own. For software developers, it’s where you can turn data and models into applications and features. Today,...

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...

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.

Founded in 2005, our services include product development, delivering next-generation digital solutions; cyber security, helping teams protect against emerging cyber threats; and artificial intelligence, unlocking the potential of your data and people.

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.

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...