Top Artificial Intelligence Startups in California, US

Our mission is to reinvent the way people learn, starting with language. Learning a language can change a life by opening doors to new cultures, careers, and communities. Two billion people around the world are actively trying to learn a language, but the best way to learn (one-on-one tutoring) is hard to access at scale and hasn’t been meaningfully improved in decades. Speak is building a human-level, AI-powered tutor in your pocket: a conversation-first experience that lets learners actually speak, get instant feedback, and progress through carefully designed lessons. The result is a complete path from beginner to confident speaker across multiple languages. Speak first launched in South Korea in 2019, where Speak has now become the number one language learning app, and we now serve learners across many markets and 15+ languages. Speak is one of the world’s leading AI companies, with over $150m raised in venture investment from OpenAI, Accel, Founders Fund, Khosla Ventures, and more, with a distributed team across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.

We're Fireflies.ai, and we're on a mission to make all meetings more productive. You know those moments when you wish you could remember that key insight from an important conversation? That's the itch we're scratching. We created a smart meeting assistant that quietly joins your meetings, records conversations, transcribes them and summarizes everything. It then automatically organizes the information into a searchable archive. Fireflies is the super-powered note-taker you've always wanted! Our goal is simple - help teams cut down on redundant conversations and unlock more value from their meetings. We integrate tightly with tools you already use like Zoom, Google Meet, Slack, Salesforce, and more so it feels seamless. Excited yet?

Today Sudowrite is an AI assistant used by novelists, screenwriters, essayists, and more. It helps writers get unstuck and suggests language, character backstories, and plot points, all while following the tone and narrative arc of the manuscript. Tomorrow, Sudowrite will be the writer's most-trusted collaborator, always available to brainstorm and co-write their best possible story. In ten years, we imagine a suite of AI-powered tools to augment and accelerate human creativity. We believe all creative work will eventually be a collaboration between human and AI. That said, Sudowrite will be our focus for quite some time.

Clientell is an AI-powered Salesforce automation platform built for RevOps teams, Salesforce Admins, and CRM Managers at mid-market companies. The platform lets users execute complex, multi-step Salesforce operations through plain English commands, with a human approval gate before anything runs. No scripts. No tickets. No waiting on a developer. Salesforce teams at companies with 800 to 3,000 employees use Clientell to automate CRM workflows, reduce manual admin overhead, and move faster on data operations that typically take days. What Clientell does: Translates natural language into validated Salesforce actions across Objects, Flows, and Records Executes bulk operations, field updates, and data migrations without code Surfaces CRM intelligence so RevOps teams can make accurate, data-backed decisions Connects directly to Salesforce orgs with enterprise-grade security and audit trails Who works here: Clientell is built by a team obsessed with removing the complexity that slows Salesforce teams down. We hire Salesforce engineers, AI/ML engineers, product managers with CRM domain expertise, and GTM operators who understand the mid-market RevOps stack.

Hey, we’re Deepgram! We’re an AI speech platform whose mission is to make every voice heard and understood. Our end-to-end deep neural network is revolutionizing the speech-to-text market and taking on the big guys. We’re redefining what companies can do with voice by offering a platform with AI architectural advantage, not legacy tech retrofitted with AI. Deepgram delivers highly accurate, actually usable transcription, right out of the box – or you can train a model for even greater accuracy on the unique words that matter to you. ✅ Live-stream or pre-recorded ✅ On-prem or in the cloud ✅ Scalable and affordable ✅ Dozens of languages and use case models ✅ Features like diarization, summarization, language/topic detection, and more. We’ve raised over $86 million and have been recognized as an Inc. Best Workplace (2021 and 2022), a Forbes Top 50 AI Company to Watch (2021), and a CB Insights Top 100 AI Startup (2021), among others. Come join our revolution to unlock the power of voice technology for everyone. We want to hear what you’ve got to say! An NVIDIA partner and Y Combinator company

C3.ai is a leading enterprise AI software provider for accelerating digital transformation. The proven C3 AI Suite provides the comprehensive services to build enterprise scale AI applications 40x to 100x faster than alternative approaches. The core of the C3 AI Suite is a revolutionary, extensible, model-driven abstraction layer that dramatically enhances data scientist and application developer productivity. The C3 AI Suite supports any value chain in any industry with pre-built, configurable, high-value AI applications for predictive maintenance, fraud detection, sensor network health, supply network optimization, energy management, anti-money laundering, and customer engagement. c3.ai

Better data leads to more performant models. Performant models lead to faster deployment. We help deliver value from AI investments faster with better data by providing an end-to-end solution to manage the entire ML lifecycle.

SourceIQ is a cutting-edge tech startup dedicated to revolutionizing supplier sourcing through automation. Our flagship product is a cloud-based enterprise solution that streamlines procurement and supplier management.

Voicera is building the data layer for trust analytics, empowering People to score sincerity in human communication objectively at scale. Why now? Trust is the new currency. • Problem: All video meetings are recorded and processed by LLMs. How people communicate is lost in transcription, causing misinterpretation, and bad decisions. • Solution : Sincerity™ by Voicera analyzes people's behavior to assess how truthful they are from non-verbal cues with 80% accuracy. • Use Cases: Sales (customer insights, revenue forecasts), Training, HR (recruitment), Internal Fraud Investigations… • Outcomes: Voicera empowers customers to make more informed, ethical decisions in situations where trust is critical.

DISCO is the leading provider of ediscovery solutions for law firms, corporations, and government agencies. With technology and services that automate and simplify complex and error-prone tasks that distract from practicing law, DISCO empowers lawyers and their teams to effectively manage discovery processes. DISCO is the ediscovery choice of leading U.S. law firms including litigation boutiques and AmLaw, Fortune 500 companies, as well as government agencies around the world. Ready for an ediscovery upgrade? Request a demo at demo.csdisco.com.