Alternatives to Turbo

Synthflow AI runs enterprise voice AI agents on its own telephony network for automated phone calls at scale.

Vapi is an API-first platform for building voice AI agents that answer and place real phone calls at sub-500ms latency.

Slang AI is a voice AI phone host for restaurants that answers calls 24/7, books reservations and routes VIPs to staff.

Open-source Python framework for building real-time voice agents you self-host, with an enterprise API for phone calls.

No-code AI voice agents that run outbound and inbound phone calls, book meetings, and take call-time actions for you.

Giga builds AI voice and chat support agents that optimize your resolution rate, escalation rate or CSAT instead of just answering calls.

Murf AI is a real-time text-to-speech API and voice-agent platform — Falcon 2 runs at 1 cent per minute, plus a studio and dubbing suite for creators.

PolyAI builds enterprise voice AI agents that resolve complex customer calls end to end in 40+ languages.

Voice AI that answers restaurant phone, drive-thru, text and kiosk orders in your brand's voice.

Bland AI runs enterprise voice AI phone agents on its own LLM, speech-to-text, and text-to-speech stack from $0.14/min.

Build voice and chat agents from a prompt in about five minutes, grounded in your own knowledge base.

Millis AI (by TMate Inc.) builds LLM voice agents you can deploy to phone numbers, web, mobile or desktop with claimed 500–600ms latency.

NextPhone is an AI receptionist that answers business calls in two rings, qualifies the caller, and books the appointment into your

Beckon by Stellar is an AI voice assistant that cold-calls every career-school inquiry within 60 seconds and books the appointment.

Inworld delivers realtime TTS, streaming STT, and speech-to-speech voice AI on one API for consumer apps.

ElevenLabs does text to speech in 90+ languages, plus voice agents, dubbing, music and Scribe transcription on one shared credit pool.

Real-time text-to-speech and streaming speech-to-text models, plus a Managed Agents runtime that runs the voice agents built on them.

Decagon builds AI concierge agents for chat, voice, and email that resolve customer support without engineering sprints.

Modular LLM agentic AI platform that automates enterprise contact centers across voice and text in Swiss-German, German, French and Italian.

Voice AI evaluation that measures 600+ dimensions of expression across 50+ languages — while Hume's TTS and EVI generation APIs wind down.

Inworld AI delivers realtime text-to-speech and speech-to-speech voice agents with TTS-2 Flash at 50ms to first audio.

Enterprise voice AI agents with in-house telephony, contracts starting at $30,000 a year

Smallest.ai runs realtime TTS, STT, speech-to-speech and telephony voice agents on a single developer API.

Open-source voice AI platform for self-hosted speech-to-speech agents with BYOK model keys.

SkipCalls is a 24/7 AI receptionist that answers your business line, books jobs, and texts you every call summary.

AI phone answering for home services that books jobs, texts follow-ups, and writes back to ServiceTitan

Callab AI deploys AI voice agents for enterprise contact centers on your existing PBX, SBC and telephony.

AgentZee is a no-code WhatsApp sales platform with AI chatbots, outbound voice calling, and broadcast campaigns from ₹1,000/month.

Voice AI combines a free real-time voice changer, 10-second voice cloning, 15+ language TTS, and enterprise AI voice agents in one platform.

EliseAI: agentic AI for property management and healthcare that answers every call, text, and chat.