Retell AI
Real-time voice-agent platform with low-latency conversational AI.
Real-time voice-agent platform with low-latency conversational AI.
Best for builders shipping real-time voice agents with custom prompts and tool calls. Pricing: per-minute (see Retell pricing).
What it is
Retell AI is a voice-agent platform focused on low-latency conversation. Developers configure agents with prompts, tools, and integrations; Retell handles ASR, LLM, TTS orchestration, telephony, and metrics. Common use cases: receptionists, scheduling bots, sales follow-up. Best fit: builders shipping real-time voice agents with custom prompts and tool calls. Caveats: cost stacks (retell orchestration + llm + voice provider). Pricing as listed: per-minute (see Retell pricing). Feature flags from vendor docs: word-level timestamps, streaming. Directory tags: voice-intel, voice-agent. Last vendor-page check: 2026-05-12.
Watch out for: Cost stacks (Retell orchestration + LLM + voice provider).
Install / use
Retell AI REST API + websocketFeatures
| Speaker diarization | No |
| Word-level timestamps | Yes |
| Streaming / real-time | Yes |
| Languages supported | None |
| HIPAA eligible | No |
Retell AI vs Whipscribe
| Feature | Retell AI | Whipscribe |
|---|---|---|
| Category | Products | Transcription APIs |
| Pricing | per-minute (see Retell pricing) | free beta |
| Speaker diarization | — | Yes |
| Word timestamps | Yes | Yes |
| Streaming | Yes | No |
| Languages | — | 99 |
| Platforms | API | Web, API, MCP |
Alternatives to Retell AI
Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.