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Sesame funding, valuation and investors
Conversational speech AI and AI glasses with sub-300ms response times.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series A
$47.5M · 2025
Latest known valuation
Not publicly disclosed
Total disclosed equity funding
$298M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
growth
Investors in latest funding
Lead: Andreessen Horowitz
Other: Spark Capital , General Catalyst , Benchmark
Overview
Sesame builds conversational speech AI with emotionally expressive, ultra-low-latency voice interaction. Founded by Oculus and Meta alumni, Sesame's Conversational Speech Model (CSM) targets sub-300ms response times for natural dialogue. The company is also developing AI glasses for voice-first interaction. Sesame raised a $47.5M Series A led by Andreessen Horowitz in 2025 with Spark Capital and Matrix participating, followed by a $250M Series B co-led by Sequoia and Spark Capital in October 2025. Additional investors include General Catalyst and Benchmark. Sesame represents the convergence of speech AI, emotional intelligence, and wearable hardware — competing with OpenAI's Advanced Voice Mode and Meta's Ray-Ban smart glasses.
Why Sesame is interesting
Oculus alumni target emotionally expressive dialogue — a16z led early rounds before Sequoia and Spark co-led the $250M Series B.
Product & use cases
Sesame builds conversational speech AI (CSM) with sub-300ms latency and emotional expressiveness, plus AI glasses for voice-first wearable interaction.
- Emotionally expressive AI voice companions and assistants
- AI glasses for hands-free voice interaction
- Ultra-low-latency conversational AI for consumer applications
Key facts
- Series B (Oct 2025): $250M co-led by Sequoia and Spark Capital (Sacra)
- Series A (2025): $47.5M led by a16z with Spark, Matrix, GC, Benchmark
- CSM targets sub-300ms emotionally expressive dialogue
- Founded by Oculus/Meta alumni; developing AI glasses
Funding history (newest first)
Series A
2025 $47.5M- Andreessen Horowitz (lead)
- Spark Capital (participant)
- General Catalyst (participant)
- Benchmark (participant)
Source: Read source · sacra.com
Investors in our directory
Funds linked from Sesame's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: Sub-300ms CSM latency with emotional expressiveness. Oculus/Meta alumni team with hardware and speech AI depth.
Voice AI and AI wearables are converging. Sesame's $250M Series B reflects investor conviction that emotionally expressive, low-latency speech AI plus glasses form a new computing interface. Meta and OpenAI have distribution advantages; Sesame bets superior voice quality wins.
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OpenAI Advanced Voice Mode direct
Expressive voice AI in ChatGPT; larger distribution but higher latency.
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Meta Ray-Ban Smart Glasses direct
AI glasses with Meta AI voice; incumbent hardware distribution.
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Hume AI adjacent
Emotional AI voice; focused on empathy measurement vs full conversational stack.
Notable stories
- Sesame's founders left Oculus/Meta to build conversational speech AI with emotional expressiveness — betting voice becomes the primary AI interface (Sacra).
- The $250M Series B in October 2025 made Sesame one of the largest speech AI funding events of the year.
Industries
Market / IPO context
Editorial / static context — not a live quote.
Related funding articles
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FAQs about Sesame
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