Alternatives to Callab AI

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

Smallest.ai is a developer-first voice AI platform for realtime TTS, STT, speech-to-speech and telephony agents on one API bill.

ElevenLabs AI voice generator turns text into speech in 90+ languages, with cloning, dubbing, music and voice agents.

Inworld AI delivers realtime text-to-speech and speech-to-speech inference for consumer voice agents, with TTS-2 Flash hitting 50ms to

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

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

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

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

Deploy low-latency conversational AI voice agents across 90+ languages in minutes.

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

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

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

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

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

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

Bland AI runs enterprise AI phone agents for regulated calls, bundling LLM, STT, TTS, and telephony into one per-minute rate from $0.14/min.

Low-latency text-to-speech API and AI voice agents — Murf AI runs real-time phone conversations at 1 cent per minute.

Real-time text-to-speech and streaming speech-to-text models plus Managed Agents for production voice agents.

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

Build, test, and scale real-time voice, video, and robotics agents on an open-source framework with published per-minute inference pricing.

MIT-licensed Python framework for building real-time voice agents you host yourself, with phone-call support via the Vocode API.

Open-source, self-hostable voice AI platform for building speech-to-speech agents with your own model keys.

No-code AI voice agents for French healthcare and SMB phone lines, handling inbound and outbound calls in 30+ languages.

Ten Framework is an open-source framework for building real-time voice AI agents with modular STT, TTS, and NLU pipelines you host yourself.

AI voice and chat support agents that chase resolution rate, escalation rate, or CSAT instead of just answering calls.

Inworld delivers realtime text-to-speech, speech-to-text, and open-model inference on one API for consumer voice apps.

Presto Voice is drive-thru voice AI that takes QSR orders and upsells every car at the speaker post.

Deepgram's speech-to-text API pairs Flux STT conversation-aware transcription with Flux TTS and a single Voice Agent API call.

Speech-to-text and voice agent APIs: transcribe, understand, and ship voice AI on one API key.

Turbo is Bland AI's all-in per-minute voice API that bundles LLM, speech-to-text, and text-to-speech into one rate.