OpenAI Chair’s Conversational AI Startup Sierra raised $350 million in a funding round.
Amount Raised
$350 Million
Round Type
Funding Round
San FranciscoSoftwareArtificial Intelligenceinformation technology & servicesInvestors
Description
OpenAI Chair’s Conversational AI Startup Sierra has successfully raised $350 million. This significant funding aims to advance their innovative projects in conversational AI technology. The round attracted notable investors, enhancing the company's growth prospects.
Quick answer
Sierra Technologies raised $350 Million in a Funding Round round, dated September 5, 2025. Investors: Greenoaks Capital Partners. Sierra Technologies is based in San Francisco, California, United States.
- How much did Sierra Technologies raise?
- Sierra Technologies raised $350 Million in a Funding Round round on September 5, 2025.
- Who invested in Sierra Technologies?
- Greenoaks Capital Partners is named as investors in this round.
- What does Sierra Technologies do?
- Sierra Technologies is an AI startup co-founded by Bret Taylor and Clay Bavor that focuses on developing a conversational AI platform for businesses.
- Where is Sierra Technologies based and how big is it?
- Sierra Technologies is based in San Francisco, California, United States. Fundz records about 320 employees.
- Who are the decision-makers at Sierra Technologies?
- Fundz holds 1 contact at Sierra Technologies. Names and contact details are shown to Fundz members.
Source: Fundz verified event record.
Who else raised in information technology & services and Software around the same time
Companies in the same sectors as Sierra Technologies that raised within 45 days of this round, from Fundz verified event records.
- TranscendAP raised $2.5M (Seed) on October 20, 2025.
- Supernaut AI raised $616K (Pre-Seed) on October 17, 2025.
- Fundamento raised $1.9M (Seed) on October 17, 2025.
- Strella raised $14M (Series A) on October 16, 2025.
- Northsea raised $767K (Pre-Seed) on October 16, 2025.
- Dedalus Labs raised $11M (Seed) on October 16, 2025.
Who to call at Sierra Technologies, and when
A new round usually means Sierra Technologies is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Sierra Technologies raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Sierra Technologies, from your own LinkedIn network
Works inside ChatGPT and Claude. Ask who to call at Sierra Technologies. With Fundz connected, it knows.
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Fundz sees it the moment Sierra Technologies raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
Related People
Sierra Technologies raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.
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