BotAI agents / Voice agents
Retell AI
by Retell AI
Voice agent platform for automating phone calls.
Closed sourcePaidVoice agents
Strengths
- No contract or base fee
- Bring your own SIP carrier
- Usage-based pricing
Weaknesses
- Per-minute cost depends on configuration
- Telephony add-ons
- Not open source
| Best for | Businesses automating inbound or outbound calls |
|---|---|
| Not for | Very low-volume hobby projects |
| Pricing | Usage-based, no platform fee; $0.055/min infra + model, voice and telephony |
| Open source | No (Proprietary) |
| Category | Voice agents |
| Verified | 2026-10-14 |
Alternatives
ElevenLabs' platform for conversational voice agents.
+ Top-tier voice quality
− LLM and telephony billed separately
Closed sourceFree optionVoice agents
Developer platform for building and running voice AI phone agents.
+ Mix and match STT, LLM and TTS providers
− Total cost per minute depends on stack
Closed sourcePaidVoice agents
Related task guides
Sources
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