Sesame
Eerily lifelike conversational voice agents, now generally available on mobile.
About
Sesame is a San Francisco startup co-founded by former Oculus CEO Brendan Iribe that builds conversational voice AI. Its research preview in early 2025 introduced the voices Maya and Miles, which drew more than a million users in the first weeks and logged over five million minutes of conversation. The company raised a $250 million Series B led by Sequoia Capital and Spark Capital in October 2025.
In October 2026 the product reached general availability on iOS and Android with four agents: Maya, Miles, Simone and Charlie. Each has its own voice, personality, memory and permission scope, plus a separate computer environment for web research, tool use and long-running tasks. The app supports natural interruption, persistent memory, scheduled workflows, connected apps, a quiet texting mode and an incognito mode. Sesame is also building AI smart glasses targeted for 2027.
The company open-sourced CSM-1B, the 1-billion-parameter base model behind Maya, under Apache 2.0, while the production stack remains proprietary and details on pricing and benchmarks are still thin.
What it can do
- Four voice agents with distinct personalities and memories
- Natural interruption and low-latency conversation
- Web research woven into live speech
- Separate computer environment per agent for tasks
- Scheduled workflows and connected apps
- Texting mode and incognito mode
Setup
- Download the Sesame app on iOS or Android.
- Create an account and pick an agent (Maya, Miles, Simone or Charlie).
- Start talking; connect apps and enable memory for ongoing tasks.
Prerequisites
A smartphone; a Sesame account.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: $250M Series B (Sequoia, Spark) Oct 2025 reported by multiple outlets; 1M+ preview users and 5M+ conversation minutes per company/Sequoia via AlphaSignal; GA on iOS/Android Oct 2026 with four agents (AlphaSignal). Strengths: exceptional voice realism, strong funding, shipping hardware-adjacent product. Docked for: (1) production model pricing and benchmarks undisclosed; (2) long-term viability tied to unshipped glasses. License: proprietary (CSM-1B base model Apache-2.0).
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 9.0/10
- Maintenance · recency, releases, issue load
- 9.0/10
- Openness · license + docs
- 6.0/10
- Manual review · sanity read + red-flag check
- 8.0/10
- · $250M Series B (Sequoia, Spark) Oct 2025 reported by multiple outlets (dataconomy, startupstorymedia)
- · 1M+ preview users, 5M+ conversation minutes per company/Sequoia via AlphaSignal
- · GA Oct 2026 on iOS/Android with Maya, Miles, Simone, Charlie; separate compute per agent (AlphaSignal)
- · Production pricing/benchmarks undisclosed; viability tied to 2027 smart glasses
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.