Vapi
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Developer platform for building and deploying voice AI agents with telephony, STT/TTS, and orchestration.
Curated voice AI directory
Build your voice agent stack
Compare platforms, models, telephony, and MCP tools — free to browse, paid to get seen.
54tools listed
10categories
5compare guides
Featured tools
Paid Featured listings, clearly labeled.
ElevenLabs
Featured
High-quality text-to-speech and voice cloning used widely in voice agents.
Retell AI
Featured
Voice AI platform for phone agents with low-latency conversation and telephony integrations.
Deepgram
Featured
Streaming speech-to-text API popular for low-latency voice agents.
Browse by category
Everything you need for a production voice agent.
Voice Agent Platforms
Hosted platforms to build, deploy, and operate production voice AI agents.
Open Source Frameworks
Open-source stacks for realtime voice agents, pipelines, and orchestration.
Speech-to-Text
Streaming and batch STT models and APIs for agent listening.
Text-to-Speech
Low-latency TTS voices for natural agent speech.
Telephony & SIP
Phone numbers, SIP trunks, WebRTC, and call infrastructure.
MCP Connectors
Model Context Protocol servers and connectors useful in voice agent stacks.
Agent Skills
Tools, functions, and skill layers agents call during conversations.
Eval & Testing
Voice agent evaluation, simulation, regression, and QA tooling.
Observability
Tracing, analytics, logging, and monitoring for voice pipelines.
Compliance & Enterprise
Security, compliance, and enterprise controls for voice AI deployments.
Recently added
Fresh tools in the catalog.
Voice AI evaluation and monitoring platform for testing phone and voice agents.
Simulation and evaluation platform for conversational and voice AI agents.
Open-source LLM observability platform used to trace agent prompts and tool calls.
LLM observability gateway for logging, caching, and monitoring model traffic.
Eval and observability platform for LLM and agent quality workflows.
Enterprise observability stack frequently used to monitor voice infrastructure and APIs.
Automated security and compliance platform used by voice AI vendors pursuing SOC 2 / ISO.
Continuous compliance automation for SOC 2, ISO 27001, HIPAA and related frameworks.
Enterprise content platform sometimes used for secure storage around voice agent artifacts.
Official Cloudflare MCP server exposing Cloudflare platform tools to agents.
Official GitHub MCP server for repository and issue operations from agents.
MCP connector for cloud browser automation useful when voice agents need web actions.