Rest
AI sleep coach app for people who want help with sleep, using chat and voice check-ins.
Subprocessors (6)
List updated Aug 25, 2026 · Checked Oct 27, 2026 · source disclosure ↗
| vendor | purpose | evidence |
|---|---|---|
| OpenAI OpenAI, L.L.C. | Generates Rest Sleep Coach's responses Conversation AI (large language model providers) | “OpenAI (OpenAI, L.L.C.) — Generates Rest Sleep Coach’s responses.” |
| Anthropic Anthropic, PBC | Generates Rest Sleep Coach's responses Conversation AI (large language model providers) | “Anthropic (Anthropic, PBC) — Generates Rest Sleep Coach’s responses; we may route conversations to either LLM provider.” |
| Vapi Vapi Inc. | Operates live voice-call sessions and assembles call transcripts Voice call infrastructure | “Vapi (Vapi Inc., a Delaware corporation) — Operates the live voice-call sessions for voice check-ins” |
| Deepgram Deepgram, Inc. | Speech-to-text during calls Voice call infrastructure | “Deepgram (Deepgram, Inc.) — Speech-to-text: converts your voice to text during calls” |
| ElevenLabs Eleven Labs Inc. | Speech synthesis for the coach's voice Voice call infrastructure | “ElevenLabs (Eleven Labs Inc.) — Speech synthesis: turns the coach’s written responses into the coach’s voice” |
| Langfuse ClickHouse, Inc. | Observability for the AI coach; stores conversation records as text AI telemetry | “Langfuse (ClickHouse, Inc.) — Observability for the AI coach” |
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Generates Rest Sleep Coach's responses
“OpenAI (OpenAI, L.L.C.) — Generates Rest Sleep Coach’s responses.”
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Generates Rest Sleep Coach's responses
“Anthropic (Anthropic, PBC) — Generates Rest Sleep Coach’s responses; we may route conversations to either LLM provider.”
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Operates live voice-call sessions and assembles call transcripts
“Vapi (Vapi Inc., a Delaware corporation) — Operates the live voice-call sessions for voice check-ins”
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Speech-to-text during calls
“Deepgram (Deepgram, Inc.) — Speech-to-text: converts your voice to text during calls”
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Speech synthesis for the coach's voice
“ElevenLabs (Eleven Labs Inc.) — Speech synthesis: turns the coach’s written responses into the coach’s voice”
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Observability for the AI coach; stores conversation records as text
“Langfuse (ClickHouse, Inc.) — Observability for the AI coach”