Skip to content

VoiceRetell AI

Retell AI

Build, test, and deploy AI voice agents for phone calls.

Category
Voice
Pricing
FREEMIUM
Source
Proprietary
Hosting
Cloud
Platforms
WebAPI
Models
Multi-model
Verified
Jun 7, 2026

A no-code platform for humanlike voice agents that handle inbound and outbound phone calls — receptionists, IVR, and outbound campaigns. It bundles telephony (SIP / Twilio), a proprietary turn-taking model for low-latency conversations, prompts, tools, and call analytics. Pay-as-you-go pricing with free starter credits.

Capabilities 3

What it actually does — grouped by capability family.

  • Voice agent (primary capability)
  • Tool / function calling (secondary capability)
  • AI app builder (primary capability)

Pros & cons

  • Inbound and outbound call handling
  • SIP/Twilio telephony built in
  • Low-latency turn-taking model
  • No-code builder plus API
  • Per-minute costs stack with LLM/TTS
  • Voice quality depends on chosen vendors
  • Cloud-only, no self-host

Tags

Alternatives to Retell AI (4)

View all Voice →
  • View Vapi details
    VoiceFREEMIUM

    Vapi

    Vapi

    Voice agent infrastructure. Build a phone-agent in a weekend.

    Production voice-agent platform — telephony, STT, LLM, TTS, and interrupt handling stitched together so you call an endpoint and get a working phone agent. Pluggable models at every layer.

    Telephony and interrupts handled
    Per-minute costs stack across layers
    • voice-agents
    • telephony
    • phone
    • real-time
    Open
  • View Bland AI details
    VoiceFREEMIUM

    Bland AI

    Bland

    Enterprise voice AI platform for automated phone calls.

    An enterprise platform for building AI agents that handle inbound and outbound phone calls 24/7 with natural, real-time conversation. Bland bundles the language model, speech-to-text, text-to-speech, and telephony into a single per-minute rate, and integrates with tools like Twilio, Salesforce, HubSpot, and Zapier. Build agents in a web dashboard or via a REST API; a free tier lets you start before moving to usage-based paid tiers.

    Bundles LLM, STT, TTS, and telephony
    Voice quality a tier below Retell/tuned Vapi
    • voice-agents
    • phone-calls
    • conversational-ai
    • telephony
    Open
  • View ElevenLabs details
    VoiceFREEMIUM

    ElevenLabs

    ElevenLabs

    Text-to-speech, voice cloning, and multilingual dubbing.

    Hosted speech synthesis at near-human quality — TTS, voice cloning, multilingual dubbing, and conversational voice agents. Default choice when you need a voice that sounds like a person, not a robot.

    Best-in-class voice realism
    Pricier than commodity TTS at scale
    • tts
    • voice-cloning
    • dubbing
    • multilingual
    Open
  • View Cartesia details
    VoiceFREEMIUM

    Cartesia

    Cartesia

    Low-latency streaming text-to-speech for real-time voice.

    Streaming-first speech synthesis built around the Sonic family of state-space models. Aims at real-time agent voices where latency between turns is the product. Strong choice for sub-200ms voice loops.

    Streaming over WebSocket for fast first audio
    Long-form expressive texture trails ElevenLabs
    • tts
    • streaming
    • low-latency
    • real-time
    Open
Open Retell AI