Voice AI startups in San Francisco Bay Area

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

Toma

San Francisco

Toma provides an AI and software suite for automotive dealers, backed by top investors including Andreessen Horowitz and Y Combinator, and partnered with Lithia Motors and Cox Automotive; it has 100+ U.S. dealers and seven-figure ARR within

Phonely

San Francisco

Phonely develops voice AI technology to improve customer support and enable doctors to see more patients, while reducing hold times. It positions itself as a leader in intelligent, scalable customer communication and aims to redefine how bu

Simple AI

San Francisco

Simple AI builds enterprise-grade voice AI agents to automate customer conversations at scale, handling millions of calls for brands like Doordash, xAI, and Omaha Steaks. Backed by Y Combinator and notable investors, the lean startup aims t

Taxo AI

San Francisco

Taxo builds agents to automate administrative workflows in healthcare, reducing clinicians' administrative burden and enabling them to focus on patients. It provides workflow-support solutions for healthcare professionals to improve efficie

Retell AI (YC W24)

Redwood City

Retell is a leading voice AI agent platform serving healthcare, insurance, financial services, and logistics; after a $4.7M seed round, it reached $5M annualized revenue in 10 months and is backed by Alt Capital, Y Combinator, and other inv

Inworld AI

Mountain View

Inworld provides realtime AI models for consumer-scale apps with orchestration and experiments, powering multimodal applications for clients like NVIDIA and Microsoft Xbox. It has a 90-person team and has raised over $125M from notable inve

Flair Labs

Palo Alto

Flair Labs builds the Flair Agent platform for real estate and lending, enabling teams to deploy autonomous agents that execute complex workflows, synthesize real-time data from diverse sources, and improve decision making.

Volley

San Francisco

**Volley** Voice AI games on smart speakers, TVs, and mobile Volley builds the best voice AI games and entertainment experiences for Amazon Alexa, smartphones, and TVs. Popular Volley voice games include “Song Quiz”, “Jeopardy!”, and “The

Hamming AI

San Francisco

Hamming automates testing for AI voice agents, creating simulations with real conditions to ensure reliability. Led by CEO Sumanyu and CTO Marius, it uses OpenAI/Anthropic tech and has seen 8x revenue growth last month.

April

San Francisco

April is an AI Executive Assistant for email and calendar that is voice-first and productivity-obsessed, backed by Y Combinator; it launched in August and has shown traction as it grows, aiming to give every busy professional the assistant

Kato

San Francisco

Kato builds an AI-powered servicing platform that automates critical workflows across channels with full compliance and best-in-class recoveries, in production with major fintech lenders including Bilt Rewards and Parafin, emphasizing a com

Vapi

San Francisco

Vapi provides a configurable platform to deploy voice agents. Aiming to make voice humanity’s default interface, it's grown to 400,000 developers in 20 months and raised $20M in Series A led by Bessemer Venture Partners, Canadian founders J

WAYLINE

San Francisco

Wayline provides 24/7 support for property managers, serving as a dependable, around-the-clock partner in property management.

OfOne

San Francisco

OfOne uses voice AI to transform drive-thru experiences for top-50 restaurant chains, automating tens of thousands of orders weekly during an active rollout. Backed by Gaia Ventures, SignalFire, Correlation Ventures, and Y Combinator, it is