AgentCall
Phone numbers, SMS and AI voice calling built for AI agents
Usage-based, numbers from $2/mo plus per-minute fees
The Voice & Video AI Agent Stack, Curated
Compare the agent platforms, speech APIs, avatars, and infrastructure you need to build real-time voice and video agents. Every listing is verified and updated weekly.
All tools
33 tools
AssemblyAI
Speech AI models for transcription and audio understanding
Usage-based, pay-as-you-go
AvatarCraft
Turn a selfie into a styled AI avatar in about 20 seconds
Free beta, 3 credits with no card
Bland AI
Enterprise platform for building and running AI phone agents
Per-minute plans plus enterprise contracts
Cartesia
Ultra-low-latency, expressive voice models for real-time AI
Freemium, paid subscription tiers
Daily
Real-time video and audio APIs, backers of Pipecat
Usage-based, free tier included
Deepgram
Speech-to-text, text-to-speech and voice agent APIs
Usage-based with free starting credit
Dograh
Open-source, self-hostable alternative to Vapi and Retell
Open source free to self-host, paid hosted cloud
Eclatira
Conversational voice and video agents that plug into any app
Freemium, paid plans from $19/mo
ElevenLabs
Lifelike text-to-speech, voice cloning and conversational agents
Freemium, paid tiers from about $5/mo
Epimela
AI receptionist that answers calls for service businesses
Not publicly listed
HeyGen
AI avatar video creation, translation and interactive avatars
Freemium, paid plans from about $29/mo
Hume AI
Emotionally intelligent voice AI and expressive speech models
Usage-based with free tier
Krisp Voice Translation API
Real-time speech-to-speech translation API for live calls
Usage-based, 60 free minutes then paid plans
LemonSlice
Interactive real-time AI avatars generated from any image
Subscription from $8/mo, custom enterprise pricing
Lipi
Local-first dictation that pastes text into any app
Free and open source
LiveKit
Open-source realtime framework and cloud for voice and video agents
Open source plus usage-based cloud
Loqua
AI voice typing and voice-driven workflows for Mac and Windows
Subscription, paid plans from about $9/mo
MoshiLin
Practice languages worldwide through live voice chat with AI translation
Not publicly listed
Myralis AI
Phone assistant with voice call mode and live screen view
Not publicly listed
NovaSynth by Noveum
Simulate realistic callers to test and score voice agents
Paid, demo-led sales
Retell AI
Build low-latency inbound and outbound AI phone agents
Usage-based, pay-as-you-go per minute
Sasu
Open-source voice agent for macOS in English, Tamil and Tanglish
Free and open source
ShabdaTara
Private local voice-to-text layer for Mac
Not publicly listed
Smallest AI Lightning V3
Low-latency text-to-speech model built for voice agents
Usage-based API with free trial credits
Speechmatics
Enterprise speech recognition and voice AI in many languages
Usage-based with free tier, enterprise plans
StashWhisper
Private offline lecture and meeting transcription for Windows
Free trial on the Microsoft Store
Synthesia Interactive Avatar API
Embed real-time, interruptible AI avatars in your own products
Enterprise plans only
Synthflow
No-code voice AI agents for sales, support and scheduling
Subscription plans with included minutes
Tavus
Real-time conversational video AI with lifelike digital humans
Freemium, paid plans by minutes
Telnyx
Carrier-grade voice API and infrastructure for AI phone agents
Usage-based per number and minute
Vapi
Developer platform for building and deploying voice AI agents
Usage-based, per-minute pricing
Voicera
Speak naturally and get polished, AI-edited text anywhere you type
Freemium, paid plans from about $4/mo
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