Sesame
AI voice companion that understands conversational context, tone, and emotion for natural dialogue
| What is it | AI voice companion that understands conversational context, tone, and emotion for natural dialogue |
|---|---|
| Pricing | Contact for Pricing |
| Free tier | No |
| Platform | Web Application |
| API | Yes |
| Works with | IFTTT |
| Best for | creating expressive voice content, building interactive AI companions |
| Domain registered | 1994 |
Data updated Aug. 1, 2026
What does Sesame do?
Sesame is an AI voice technology platform that creates conversational partners with what the company calls 'voice presence'—the ability to engage in natural, emotionally intelligent dialogue. Unlike traditional text-to-speech systems that generate audio from text in isolation, Sesame's Conversational Speech Model (CSM) uses the entire conversation history to determine the most appropriate tone, rhythm, and emotional expression for each response. This approach allows the AI to understand context and produce speech that feels genuinely interactive rather than pre-programmed.
The technology works through a two-transformer architecture that processes interleaved text and audio tokens. A multimodal backbone handles the zeroth codebook prediction, while a smaller audio decoder generates the remaining acoustic codebooks. This single-stage approach improves efficiency and expressivity compared to traditional multi-step speech synthesis methods. Sesame's models come in three sizes (Tiny, Small, and Medium) and are trained on approximately one million hours of English audio, enabling them to handle the 'one-to-many' problem of speech generation where multiple valid vocal expressions exist for any given text.
Sesame is particularly useful for applications where natural-sounding dialogue matters, such as creating AI companions, enhancing customer service bots, or generating expressive voice content. The technology's ability to maintain consistent personality and adapt to emotional contexts makes it suitable for scenarios where users expect more human-like interactions than what current voice assistants provide. The platform is currently in preview, with users able to test conversational speech generation through the web app.
Key features
What makes it stand outWho is Sesame for?
Who benefits most from this toolTrust & presence
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