All tools

Vapi

Developer platform for building voice AI agents

Retell AI

Platform for building and deploying AI phone agents

Bland AI

Enterprise AI phone calling platform for inbound and outbound call automation

Synthflow

No-code platform for building AI voice agents for phone calls

ElevenLabs Agents

ElevenLabs' conversational voice agent platform built on its text-to-speech models

Ultravox

Speech-native model and platform for realtime voice AI agents

Millis AI

Platform for building low-latency voice agents

Vogent

Platform for building humanlike AI phone agents

Bolna

Voice AI agent platform for building phone agents

Thoughtly

AI phone agent platform for sales and support calls

Trillet

AI voice agent platform

Dasha

Conversational voice AI platform for building phone agents

Voiceflow

Platform for designing and launching chat and voice AI agents

Botpress

AI agent builder for chat and voice channels

Voximplant

Cloud communications platform with tools for voice AI and call automation

Smith.ai

Answering service combining AI and human receptionists for small businesses

Rosie

AI phone answering service for small businesses

Goodcall

AI phone agent for small businesses that answers calls and captures leads

My AI Front Desk

AI receptionist that answers calls and books appointments

Dialzara

AI phone answering service for small businesses

Slang.ai

AI voice assistant built for restaurant phone calls

Numa

AI call and text assistant for car dealerships

Loman

AI phone ordering and receptionist for restaurants

Phonely

AI phone agents for answering business calls

Lindy

AI assistant platform that includes AI phone agents for calls

Regal

AI agent platform for outbound and inbound contact center calls

Hyperbound

AI sales roleplay for practicing cold calls and discovery

PolyAI

Enterprise voice AI agents for customer service phone lines

Parloa

AI agent management platform for enterprise customer service

Cognigy

Enterprise conversational AI for contact centers

Sierra

Conversational AI agents for customer experience

Decagon

AI agents for enterprise customer support across chat

LiveKit Agents

Open-source realtime infrastructure and agents framework for voice and video AI

Pipecat

Open-source Python framework for voice and multimodal conversational agents

Vocode

Open-source library for building voice-based LLM agents

OpenAI Realtime API

OpenAI's API for low-latency speech-to-speech conversations

Gemini Live API

Google's API for realtime voice and video interactions with Gemini

Deepgram

Speech-to-text

Cartesia

Low-latency realtime text-to-speech models

Hume AI

Emotionally expressive voice AI and speech models

AssemblyAI

Speech-to-text and speech understanding APIs

Speechmatics

Speech recognition API supporting many languages

Gladia

Realtime and async speech-to-text API

Soniox

Speech recognition models and API

Rime

Text-to-speech voices built for conversational applications

Resemble AI

Deepfake detection for AI-generated audio

Twilio

Cloud communications APIs for voice

Telnyx

Communications platform with its own network for voice

Vonage

Communications APIs and business phone services

Plivo

Voice and SMS APIs and phone numbers

Hamming

Automated testing and monitoring for voice AI agents

Coval

Simulation and evaluation platform for voice and chat agents

Cekura

Testing and observability for conversational voice agents