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Late-stage venture AI companies in San Francisco

Companies building AI products, foundation models, and applied ML platforms. Filtered to Late-stage venture-stage companies headquartered in San Francisco.

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Built from a search like: “Top Late-stage venture AI companies in San Francisco”

Ranked by current headcount across Late-stage venture AI companies in San Francisco. Refreshed monthly.

  1. 1
    OpenAI· San Francisco, California, United States

    OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. AI is an extremely powerful tool that must be created with safety and human needs at its core. OpenAI is dedicated to putting that alignment of interests first — ahead of profit.To achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. Our investment in diversity, equity, and inclusion is ongoing, executed through a wide range of initiatives, and championed and supported by leadership.At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

    • Series unknown
    • 10.7k employees
    • Founded 2015
  2. 2
    Kits.AI· San Francisco, California, United States

    Kits.AI is an AI Audio research company building music tools for the next generation of creators.Our research focuses on AI Singing + Music architectures and is committed to licensed data sourcing practices.We combine leading AI Music research with deep music production experience to deploy music tools that fit seamlessly into musician workflows. Kits.AI tools have been used by over 6,000,000 creators to access infinite singing voices for production, clone and share their own voice to cut down on studio time, and unlock entirely new music production workflows enabled by AI. Kits is backed by the best in music and tech, including Andreessen Horowitz (a16z), WndrCo, Electric Feel Ventures (EFC), 1Confirmation, Steve Aoki, 3LAU, Lionel Richie, Wyclef Jean & more.For more information please visit www.kits.ai

    • Series unknown
    • 11 employees
    • Founded 2021

Find engineers at Late-stage venture AI companies in San Francisco

Searching for “engineers at top Late-stage venture AI companies in San Francisco” surfaces this slice of the market. The list above ranks AI companies headquartered in San Francisco whose latest disclosed round is Late-stage venture, by current headcount, drawn from public LinkedIn and Crunchbase records. With 2 matching companies in Refolk’s index, this is a tight read on where the AI talent in San Francisco is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Late-stage venture, AI, in San Francisco - are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become AI’s next operators and angel investors.

Refolk converts this list into a live search. Ask for “senior engineers at Late-stage venture AI companies in San Francisco hiring” or “founders of Late-stage venture AI companies in San Francisco who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.

How this list is built

Refolk pulled AI companies headquartered in San Francisco whose latest disclosed funding round is Late-stage venture from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes monthly.

Last refreshed: Fri, 18 Sep 2026 07:51:04 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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