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VoicePhonic

Phonic

Speech-to-speech platform for reliable voice agents.

Category
Voice
Pricing
PAID
Hosting
Cloud
Platforms
APIWeb
Models
Self-contained (on-device)
Verified
Jun 20, 2026

Phonic is a platform for building production voice agents on its own end-to-end speech-to-speech models, rather than chaining separate speech-to-text, LLM, and text-to-speech stages. It targets sub-300ms latency for natural turn-taking and reliable tool calling, and bundles evaluation, session records, and real-time observability to surface failure points. Aimed at enterprises, it offers cloud API access plus containerized deployment in your own environment.

Pros & cons

  • Own end-to-end speech-to-speech models
  • Sub-300ms conversational latency
  • Built-in eval and observability
  • Self-host / containerized option
  • Enterprise-focused, no public free tier
  • Pricing not published
  • Younger than larger voice platforms

Tags

View all Voice
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    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
  • View Retell AI details
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    Retell AI

    Retell AI

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

    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.

    BYO LLM behind the voice agent
    Per-minute costs stack with LLM/TTS
    • voice-agents
    • telephony
    • call-automation
    • no-code
  • View Cartesia details
    VoiceFREEMIUM

    Cartesia

    Cartesia

    Low-latency streaming TTS. Sub-100ms first audio.

    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.

    Sub-100ms time-to-first-audio over WebSocket
    Long-form expressive texture trails ElevenLabs
    • tts
    • streaming
    • low-latency
    • real-time
  • 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.

    All-in-one per-minute pricing, no surcharges
    Voice quality a tier below Retell/tuned Vapi
    • voice-agents
    • phone-calls
    • conversational-ai
    • telephony