Startups in San Francisco

Poolside

San Francisco

Poolside is building the world's most capable AI for software development, focusing on distributed training and inference of large language models for source code generation, with a mission to unlock developers' potential through AI for sof

The Bot Company

San Francisco

The Bot Company builds household robots to give people back time, pursuing in-house AI, software and hardware. It plans to deploy millions at home before expanding, and has raised $300M, including a $150M Greenoaks-led round, valuing the co

Decagon

San Francisco

Decagon is a leading conversational AI platform delivering concierge customer experiences with AI agents across chat, email, and voice in any language. It serves brands like Hertz, Eventbrite, Duolingo, and Oura and is backed by Accel and A

Decart

San Francisco

Decart provides efficient systems-level AI infrastructure that dramatically accelerates training and inference of the largest generative models, enabling Decart to train its own foundational interactive models and offer real-time access to

Cursor

San Francisco

Anysphere develops Cursor to automate coding and build the premier tool for professional programmers, driven by research, design, and engineering from a San Francisco team backed by investors; its engineers and scientists have a track recor

Corgi

San Francisco

Corgi is an AI financial infrastructure company focused on building AI-enabled financial infrastructure, placing it at the intersection of artificial intelligence and finance.

LMArena

San Francisco

LMArena, created by UC Berkeley researchers, is an open platform for accessing and comparing leading AI models, where users rate responses and help build a public, real-world leaderboard to increase transparency in AI progress.

Assort Health

San Francisco

Assort Health offers what it calls the most comprehensive patient experience platform, handling 115M+ interactions since 2023 with 98%+ resolution, 99% scheduling accuracy, 4.4/5 patient satisfaction, and 15x revenue growth since Q4 2024, l

Factory

San Francisco

Factory is a platform for agent-driven software development. It serves customers such as MongoDB, Framer, Empower, Zapier, and Eightfold AI, and raised a $15 million Series A led by Sequoia Capital.

Cartesia

San Francisco

Cartesia builds the next generation of AI—ubiquitous, interactive intelligence that runs wherever you are. It maintains a Discord community (discord.com/invite/cartesia) and showcases its work at cartesia.ai.

Together AI

San Francisco

Together AI is a research-driven AI cloud infrastructure provider. Our purpose-built GPU cloud platform empowers AI engineers and researchers to train, fine-tune, and run frontier class AI models. Our customers include leading SaaS companies such as Salesforce, Zoom, and Zomato, as well as pioneering AI startups like ElevenLabs, Hedra, and Cartesia. We advocate for open source AI and believe that transparent AI systems will drive innovation and create the best outcomes for society.

Prime Intellect

San Francisco

Prime Intellect builds open-source decentralized AI training infrastructure that pools global compute so teams can train, fine-tune, and RL-train their own models and agents.

Inferact

San Francisco

Inferact is a startup founded by creators and core maintainers of vLLM, the most popular open-source LLM inference engine. Our mission is to grow vLLM as the world's AI inference engine and accelerate AI progress by making inference cheaper and faster.

Higgsfield

San Francisco

We're a video AI company dedicated to democratizing social media content creation to everyone

Serval

San Francisco

Serval is an AI platform for IT teams that replaces legacy systems with automation, freeing people to focus on meaningful work. It is trusted by Perplexity, Together AI, Writer, Mercor, and Verkada to automate over half of their IT tickets.

DepthFirst

San Francisco

depthfirst is an applied AI lab dedicated to securing the world's software, focusing on AI-native security as software underpins modern civilization and exploits are expected to rise with AI proliferation.

Reducto

San Francisco

Reducto offers an API-style platform that converts complex documents into inputs for large language models, serving hundreds of customers from startups to Fortune 10 and processing tens of millions of pages monthly from its San Francisco he

Bland

San Francisco

The company provides AI-powered phone call capabilities for enterprise customers, positioning itself as an enterprise-first provider and aiming to lead AI-driven telephony for large organizations.

Campfire

San Francisco

Campfire is an AI-native ERP for mid-size and enterprise companies to close fast and scale faster. Based in San Francisco, it is backed by Accel, Foundation Capital, Y Combinator and Capital49(Airwallex), serving 50 to 5,000-employee firms

Listen Labs

San Francisco

Listen is an autonomous market researcher that uses AI to design interviews, recruit participants, and analyze responses, delivering insights in hours rather than weeks, 24/7. Trusted by Google, Microsoft, SKIMS, Nestlé, and hundreds of ent

Bretton AI

San Francisco

Bretton AI (formerly Greenlite AI) builds AI agents for financial crime compliance, helping banks and fintechs automate AML and KYC work.

CodeRabbit

San Francisco

CodeRabbit is an innovative, AI-driven platform that transforms the way code reviews are done. It delivers context-aware, human-like reviews, improving code quality, reducing the time and effort required for thorough manual code reviews, and enabling teams to ship software faster. Trusted by over a thousand organizations, including The Economist, Life360, ConsumerAffairs, Hasura, and many more, to improve their code review workflow. CodeRabbit is SOC 2 Type 2, GDPR certified, and doesn't train on customer's proprietary code.

David AI

San Francisco

David AI builds audio datasets through R&D; founded in 2024 by former Scale AI engineers, it counts FAANGs and AI labs among customers and raised a $50M Series B from Meritech, NVIDIA and others, achieving seven-figure revenue in six months

Edison Scientific

San Francisco

Edison Scientific, spun out from FutureHouse in 2025, accelerates scientific discovery by building and commercializing AI agents for science, pursuing an AI Scientist to scale autonomous research and tackle challenges such as drug developme

Runware

San Francisco

Runware delivers AI-as-a-Service at 5–10x lower cost and with higher speed than competitors. Built for scale, the service has already powered 4 billion+ creations for +100K developers and +250M end-users worldwide. Founded in 2023 and headquartered in San Francisco, Runware is backed by Insight Partners and a16z.

Stand Insurance

San Francisco

The company protects and insures homes against wildfire and hurricane risks by applying physics and AI to model true property risk, enabling more homes to be insurable.

Salient

San Francisco

Salient is an AI-driven workflow automation platform for lenders, starting with auto loan servicing. Since launching in 2023, it has surpassed $10M ARR, achieved cash-flow positivity, partnered with major U.S. lenders, and identified 35k+ C

Giga

San Francisco

Giga provides enterprise customer support by deploying AI agents, handling over 1 million tickets monthly, and counting industry leaders like Postman and Zepto among its clients, with rapid scaling backed by investors including Garry Tan and Nexus Venture Partners.

Zip

San Francisco

Zip, founded in 2020, pioneered procurement orchestration and leads $50B+ TAM, serving enterprises such as Instacart, Sephora, Reddit, Lyft, and brands like Airbnb, Facebook, Google. Valued at $2.2B with $370M in funding from Y Combinator,

Ambience Healthcare

San Francisco

Ambience Healthcare is a San Francisco-based AI platform for documentation, coding, and clinical workflows that reduces administrative burden and protects revenue at the point of care. Founded 2020 by Mike Ng and Nikhil Buduma; backed by Oa

Habitat Health

San Francisco

Habitat Health was founded in 2023 to deliver fully integrated health and social care to older adults on Medicare or Medicaid who wish to remain living independently in their homes and communities. Habitat Health provides care through the Program of All-Inclusive Care for the Elderly ("PACE") in collaboration with local community partners. The company is supported by Kaiser Permanente, Town Hall Ventures, and New Enterprise Associates.

Rox Data

San Francisco

Rox helps businesses secure and grow revenue.

Lindy

San Francisco

Lindy is an AI assistant that manages tasks and acts as an executive assistant for busy professionals. Its agents integrate with tools and use personalized context to automate tasks, aiming to automate knowledge work by enabling workflow au

Artisan

San Francisco

Artisan builds AI employees called Artisans and aims to replace the SaaS stack with a single integrated platform, starting with outbound sales; it consolidates every sales SaaS into one platform, framing it as next Industrial Revolution and

Harper

San Francisco

Harper is a commercial E&S insurance brokerage with an AI-native platform and proprietary AI stack that handles prospecting through binding and service. Founded in August 2024, it has grown ARR from $400k to near $5M, aiming for $10M by Q1.

Nirvana Insurance

San Francisco

Nirvana is on a mission to harness the power of data to revolutionize commercial insurance and enable a safer world. We are bringing much-needed innovation into the legacy, trillion-dollar commercial insurance industry. We have developed cutting-edge predictive models that use real-time IoT data from billions of connected devices, allowing us to better understand and price risk. Our AI-driven platform fundamentally changes the way an insurance company operates with personalized risk scoring, faster underwriting, modernized claims, and proactive, data-driven insights to help customers prevent accidents. We’ve already proven the scale—reaching well over $100 million in premiums and more than doubling year over year. Our data moat is growing exponentially with more than 20 billion miles of telematics data, leading to more predictive models and new insights into how we can better understand and reduce risk. Altogether, our loss ratio, efficiency, and customer experience are redefining what can be done in the industry. With $170+ million raised, including an industry-leading Series C round in January 2025, we’re only accelerating our growth, with strong support from top-tier VCs including Lightspeed, General Catalyst, and Valor. Nirvana’s leadership team has previously helped scale multi-billion-dollar companies from scratch, including Samsara, Rubrik, and Flexport, and includes industry veterans from Hiscox, The Hartford, and RLI.

Guild.ai

San Francisco

Introducing Guild.ai. Our mission is simple: make building with AI as open and collaborative as open source. We’re creating tools for the next generation of intelligent systems, designed for builders who see craft, reliability, scale, and community as essential. By making AI development open, transparent, and collaborative, we’re enabling builders to move faster, ship with confidence, and learn from one another as they shape what comes next.

Noon

San Francisco

Noon (formerly Weaver) is an AI-native product design tool that links design and code so product teams can go from idea to shipped interface.

Netic

San Francisco

We help essential service industries grow on autopilot. Essential services power the real economy. Every one of us interacts with these industries repeatedly throughout our lives. But these large businesses face real-world constraints—human labor, external volatility, compliance, logistics, and physical infrastructure. Their operations are complex and often rely on outdated systems and manual workflows, and they can’t access the frontier technologies that drive digital-first businesses. In a world where startups mostly build for startups, we serve the large enterprises in real industries and end users that keep America running. We're a small team of relentless builders, ex-founders, and immigrants from top CS schools and tech companies who thrive on solving hard problems and making a tangible impact. We are backed by the best investors and founders of our generation.

Superpower

San Francisco

Superpower runs a membership-based health program centered on biomarker insights, with transparent pricing and no hidden fees. It offers 24/7 support and resources, plus HSA/FSA-eligible plans, delivering flexible, proactive health manageme

Lotus Health AI

San Francisco

Your AI doctor, powered by real doctors & leading medical evidence. Get free primary care and unprecedented health insights.

Imbue

San Francisco

This company aims to rekindle the dream of personal computing by making reliable software creation accessible to all, empowering humans in an AI era with powerful computing tools and researching verification of LLM-generated code to ensure

Counsel Health

San Francisco

Counsel is building an AI-driven healthcare practice to scale care delivery and provide rapid, personalized medical advice, leveraging partnerships with leading healthcare organizations and collaborative clinician–AI models; founded 2023, r

Parafin

San Francisco

Parafin provides fintech infrastructure for marketplaces, vertical SaaS, and payment platforms, using real-time performance data to tailor financial services for platforms serving small-business sellers. Its platform-focused, data-driven ap

Delve

San Francisco

Delve is an AI-native compliance company helping 700+ fast-growing firms achieve SOC 2, HIPAA, ISO, GDPR, and other standards in days, not months; trusted by Lovable, Bland, and Wispr Flow, and building an AI-native platform to automate com

E2B

San Francisco

E2B is a Series A startup building the next hyperscaler for AI agents. It has seven figure revenue and has raised over $32M from investors including Insight Partners, serving Perplexity, Hugging Face, Manus, and Groq in San Francisco and Pr

Casca

San Francisco

Casca is building AGI for banking, replacing legacy systems with AI-native tech that automates 90% of manual work. It emphasizes responsible AI with human-in-the-loop monitoring and is backed by Y Combinator, Peterson Ventures, The Sarah Sm

Alembic

San Francisco

Alembic provides causation analytics on proprietary data at scale, answering questions generic AI cannot. It serves Fortune 500 clients including Nvidia, Delta Air Lines, Mars; it operates one of the world's fastest private supercomputers a

General Medicine

San Francisco

General Medicine is a healthcare store focused on transforming outpatient care access by providing fast, price-transparent guidance on the next best clinical steps for all patients, regardless of insurance, aiming to speed care and empower

Wordware

San Francisco

Wordware offers a web-hosted IDE that lets non-technical domain experts collaborate with AI engineers to build task-specific AI agents, treating prompting as a programming language for natural language programming and agent orchestration.

Slash Financial

San Francisco

Slash is a fintech company building industry-specific business banking, backed by YC, NEA, Stanford University, and others; it powers over three billion dollars a year in business purchasing and is among the fastest growing fintechs.

Slash

San Francisco

Slash is a fintech company building industry-specific business banking, backed by YC, NEA, Stanford University, and others; it powers over three billion dollars a year in business purchasing and is among the fastest growing fintechs.

LangChain

San Francisco

LangChain provides the agent engineering platform and open source frameworks developers need to ship reliable agents fast. LangSmith offers observability, evaluation, and deployment for rapid iteration. Our open source frameworks, LangGraph, LangChain, and Deep Agents, help developers build agents with speed and granular control. LangSmith is trusted by leading AI teams at Zip, Vanta, Klarna, Workday, Linkedin, Cloudflare, and more.

AfterQuery

San Francisco

AfterQuery builds datasets and experimentation to advance frontier LLM and AI-agent workflows, constructing complex data-infrastructure for agentic and hard-reasoning tasks. It partners with five AI labs and is YC's infrastructure partner, led by teams from top banks and quant firms.

Further

San Francisco

FurtherAI is a domain-specific AI company for the insurance industry, helping insurers, reinsurers, MGAs, and brokers drive better decisions at scale. Backed by a16z, Y Combinator, Nexus, and Converge, it supports customers writing over $15

Judgment Labs

San Francisco

Judgment Labs provides infrastructure for Agent Behavior Monitoring (ABM) to observe post-deployment autonomous-agent behavior at scale, serving hundreds of teams. It has raised over $30 million from notable investors and positioned as a le

FurtherAI

San Francisco

FurtherAI is a domain-specific AI company for the insurance industry, helping insurers, reinsurers, MGAs, and brokers drive better decisions at scale. Backed by a16z, Y Combinator, Nexus, and Converge, it supports customers writing over $15

Unify

San Francisco

Unify is an AI-first go-to-market platform that treats growth as a science, powering pipeline for leading teams such as Airwallex, Cursor, Perplexity, Together AI, and Guru. Founded Jan 17, 2023 by Austin Hughes and Connor Heggie, with a Li

Collective

San Francisco

Collective is the first all-in-one financial platform designed to give self-employed entrepreneurs the technology and team they need so they can focus on their passion, not their paperwork. Collective handles LLC and S Corp formation, payroll, taxes, monthly bookkeeping, compliance and more all in one place, exclusively for solopreneurs.

Linea Energy

San Francisco

Linea Energy is a newly-formed Independent Power Producer aiming to change the status quo of how clean energy is developed and financed to rapidly increase the speed of deployment. Linea has hit the ground running with an experienced and driven team. We're scaling quickly to become a transformational leader in the development and ownership of clean energy infrastructure. By leveraging best-in-class development capabilities and active risk management, we aim to consistently create better results for partners and communities. Backed by EnCap’s Energy Transition team, Linea Energy has the strategic and capital backing to build, own, operate and trade products from our portfolio of renewable and energy storage assets.