Machine Learning startups in San Francisco

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.

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.

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

Encord

San Francisco

Encord offers a multimodal data labeling, curation and evaluation platform for AI, built by quants, physicists and computer scientists; backed by CRV and YC, it is SOC 2, HIPAA and GDPR compliant and serves customers including Synthesia and

Artificial Intelligence Underwriting Company (AIUC)

San Francisco

The company underwrites superintelligence and evaluates, certifies, and insures agents, focusing on assessing and supporting agents within the realm of advanced intelligence.

DeepGrove

San Francisco

The company develops AI foundation models optimized to run efficiently on any device, including on-device large language models that can operate entirely on a smartphone, aiming to match top-tier rivals like OpenAI or Google in performance

Eloquent AI

San Francisco

Eloquent AI designs autonomous AI agents for regulated industries, enabling real-time compliance and reducing hallucinations in high-stakes interactions, serving financial institutions and insurers worldwide from its San Francisco headquart

Magnetic

San Francisco

Magnetic is building an AI tax preparer for CPA firms, publicly launched in 2025, with $5.2M in funding and ARR in the hundreds of thousands across dozens of firms, aiming to automate tax prep with higher accuracy and better workflow.

Blockit

San Francisco

Blockit is a Series A, Sequoia-backed AI time agent that learns user preferences and coordinates meetings across time zones and group calendars. It underpins AI agents with access to the world's time, growing stronger as calendars are linke

Scale AI

San Francisco

Scale AI provides data-centric infrastructure to accelerate AI development, helping organizations build strong AI models and derive business insights and operational efficiency; serving customers across tech, government, and enterprise, inc

Sourceress

San Francisco

Sourceress is a San Francisco-based AI recruiter, founded in 2017, with a 35-person team. Its process leaves hiring managers excited about candidates more than 85% of the time.

Unsloth AI

San Francisco

Unsloth AI, a San Francisco–based company, makes custom AI accessible by fixing critical LLM bugs (Gemma, Llama, Phi-4) and conducting open-source RL and fine-tuning; YC S24-backed with investors such as Logan Kilpatrick and Jon Oringer, us

Idler

San Francisco

Idler builds reinforcement learning coding environments that train AI to code like elite engineers using real-world scenarios. It closed a multimillion-dollar contract with a leading foundation lab and is scaling to power the training data

Persana AI

San Francisco

Persana AI, a YC Winter 2023 startup, aims to revolutionize how companies execute go-to-market strategies, led by CEO Sriya Maram and co-founder Rush Shahani, with backgrounds at LinkedIn and NLP-focused roles at ElementAI and Shopify.

Conduit Intelligence

San Francisco

The company develops noninvasive thought-to-text technology to bridge communication between people and devices by reducing the language barrier.

Strada

San Francisco

Strada provides AI agents that handle sales and service calls 24/7 for insurance brokers, MGAs, and carriers, enabling them to scale operations. Based in San Francisco and backed by Y Combinator, it serves carriers and MGAs, engaging thousa

Midcentury Labs

San Francisco

Midcentury is building a next-generation platform for audio AI that enables secure onboarding of private data and expert-labeled data services from global contributors to tackle multimodal AI with massive data pipelines; it recently raised

Hud

San Francisco

The company provides a platform for building reinforcement learning environments and evaluations, enabling researchers to design, run, and assess RL experiments, and offers the CUA Evals framework with scalable agent evaluation and training

Swayable

San Francisco

Swayable is a Delaware Public Benefit Corporation that measures how media content changes minds. Its cloud data product empirically measures ad impact to double effectiveness, backed by Y Combinator and partners including Amazon, Meta, IBM,

Openlayer

San Francisco

Openlayer, founded by three former Siri engineers, builds sustainable, high-performing, ethical machine learning for enterprise clients; backed by Y Combinator and investors from Instagram, Voyage, Instacart, Sendbird, and Mercury, and work

Berry

San Francisco

Berry is a Y Combinator-backed startup serving SaaS companies worldwide. Led by co-founder and Chief Product Officer Ann Chan and founder Yan Fu, a former startup CTO, Berry scales services for SaaS firms using React, TypeScript, Python, RE

Lucid

San Francisco

Lucid is a small team building real-time interactive video models, whose work is described as sparking joy, and it seeks an engineer to build the infrastructure enabling real-time video generation at scale across cloud and bare metal enviro

Turing Labs

San Francisco

Turing Labs Inc. provides an AI-powered SaaS platform for the CPG industry to help companies create new products using data and industry-specific AI, pursuing a more sustainable world; Forbes describes it as 'the Palantir for the CPG indust

Decipher AI

San Francisco

Decipher AI offers an analytics agent that analyzes session replays to reveal user behavior, automatically uncover and prioritize issues, and reduce churn. It is led by a small team of ex-Googlers, including co-founders Rohan Das and Michae

AI Insurance

San Francisco

AI Insurance offers a platform for SMB insurers to run all business processes, aiming to do for SMB insurance what Salesforce did for SMB sales, targeting 10,000+ firms and $238B in admin waste, to digitize and automate claims and underwrit

Synth

San Francisco

Synth helps agent developers maintain and improve their AI software by identifying problems and fixing them with changes to scaffolding code, prompts, and models. It builds Research Engineering Agents and focuses on advancing AI agent devel

Social Radar

San Francisco

Social Radar is a San Francisco-based B2B software and services company with a three-person team, founded by Rohan Arora and Venkat Krishnan. It bills itself as the best way to search for posts, people, and comments across channels.

Anglera

San Francisco

Anglera, a Y Combinator S24 company, uses AI agents to transform messy product data into structured, AI-ready listings and automate catalog management, positioning itself as infrastructure for intelligent commerce; led by Amay Aggarwal and

Wafer

San Francisco

Wafer provides a GPU optimization platform for AI model training and inference, plus infrastructure for inference and GPU optimization, focused on optimized AI inference tailored to each stack.