All Stacks
Voice AI

Voice AI Developer Stack

Build phone agents, voice interfaces, and speech-powered products — with the transcription, synthesis, and conversation management tools developers use.

Tools in This Stack

1
Vapi logo
Vapi

Developer Tools

freemium

Build and deploy voice AI agents that handle phone calls, SMS, and chat at enterprise scale with sub-500ms latency.

2
Deepgram logo
Deepgram

Developer Tools

freemium

Convert speech to text (and text to speech) in real time via API on Nova-3, so developers add voice understanding to their apps with usage-based per-minute billing.

3
ElevenLabs logo
ElevenLabs

Audio

freemium

Clone a voice or narrate anything with Eleven v3 — the most natural-sounding TTS available. Text-to-Dialogue generates multi-speaker conversations in a single API call.

4
Retell AI logo
Retell AI

Automation

freemium

Power phone and chat agents that sound natural in conversation, assembled from any mix of LLM, voice, and telephony provider.

5
ChatGPT logo
ChatGPT

Writing

paid

Your go-to for drafts, research, brainstorming, and first passes on almost anything. The most versatile AI in the room.