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Sesame
AI research team building human-like voice companions that listen, speak and assist throughout daily life
About Sesame
Sesame AI is pioneering a new era of voice companions—bringing speech to life through devices that blend seamlessly into daily life. Their core mission is to make voice feel nuanced and natural, not robotic or forced. To achieve this, they’re building advanced voice models with the subtle pauses, breaths, emotions, and timing of real conversation. The result is a voice interface that feels more like chatting with a friend than issuing commands to a machine.
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At the heart of this experience is their Conversational Speech Model (CSM)—a sophisticated AI trained to understand context in real time and respond fluidly. Early demos have amazed listeners by crossing the “uncanny valley,” delivering speech that feels surprisingly human. To make these companions truly practical, Sesame is also designing lightweight wearable devices—specifically sleek glasses—that stream high-quality audio directly from your voice companion as it observes your surroundings. The combination of hardware, software, and machine learning creates a unified system designed to be always present, always listening, and always helpful—without ever being intrusive.
Their ultimate goal is clear: turn voice into a rich, everyday interface, and give people a personal companion that’s conversational, intuitive, and naturally integrated into their lives.
At a glance
- Status
- Operational
- Founded
- 2023
- Headquarters
- San Francisco, United States
- Employees
- 79
- Open positions
- 18
- Dealroom signal
- 94.8/100
- Sector
- AI, Human Computer Interaction, Speech Recognition, Voice Recognition, Conversational AI, Core AI, Virtual Assistant
- Technology
- Artificial Intelligence, Hardware, Deep Tech, Machine Learning, Natural Language Processing
- Business model
- Manufacturing, SaaS
- Client focus
- b2c
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES BOther financing | Oct 2025 | $250M | $1B | Spark Capital · Sequoia | ↗ |
| SERIES AOther financing | Nov 2023 | $58M | $230M | Andreessen Horowitz · BIG Ventures · Matrix · Spark Capital | ↗ |
Growth signals
Latest recorded traffic for Sesame is 1.1M monthly website visits, up 0% over the last three months. Sesame's team grew 0% over the past year.
Open positions
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Series A5 investors entered at this stage
Andreessen Horowitz- BVBIG Ventures
Matrix
Spark Capital
Sequoia
Source: Dealroom Talent Intelligence.
Global footprint
Market sentiment
An AI-synthesised read of the highest-engagement posts about Sesame on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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