20 Vapi alternatives
Vapi: A developer platform for voice agents that make and take phone calls, with sub-second turn latency. 20 apps do similar work, most sharing Voice Agents, API and Developers, ranked by how much they have in common with Vapi.
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Developer platform for AI agents on Apple's own channels — programmable iMessage at scale, plus video agents that answer and place FaceTime calls in a few lines of code.
Also: API, Developers, Telephony, Voice Agents
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MeetStream AI
One API for meeting bots across Zoom, Google Meet, Teams and Webex — join, record, stream and speak in real time, billed at $0.35 an hour.
Also: API, Developers, Voice Agents
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Enterprise speech infrastructure — fast, accurate transcription, text to speech, and a full voice agent API.
Also: API, Developers, Voice Agents
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Voice AI that reads and expresses emotion — speech models trained on human vocal expression, not just phonemes.
Also: API, Developers, Voice Agents
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Ultra-low-latency speech models built for real-time voice agents, where every millisecond is audible.
Also: API, Developers, Voice Agents
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Bland AI
Enterprise phone agents on self-hosted models, tuned for human-sounding delivery at very large call volumes.
Also: Telephony, Voice Agents
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Build, test, and monitor production phone agents — with the testing and analytics that call centres actually require.
Also: Telephony, Voice Agents
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Estera AI LLC
AI receptionist that answers every call and WhatsApp message for local service businesses, 24/7.
Also: Telephony, Voice Agents
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Open-source voice AI platform you can self-host — a visual workflow builder, bring-your-own STT/LLM/TTS models, telephony, and no per-minute platform lock-in.
Also: Telephony, Voice Agents
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Interface, Inc.
AI receptionist and second work number for local service businesses — answers calls 24/7, transcribes everything, and turns each conversation into summaries and next steps.
Also: Telephony, Voice Agents
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Autophonix, LLC
AI voice agents for inbound and outbound phone calls, priced from 2¢ per minute, with 40+ languages, native SIP trunking and HIPAA/GDPR compliance.
Also: Telephony, Voice Agents
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Voice and text AI agents that run multi-week outbound calling campaigns for home-service businesses.
Also: Telephony, Voice Agents
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Low-latency speech APIs from the team behind the open-source Dia model — text-to-speech and transcription priced well below the incumbents.
Also: API, Voice Agents
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A router for voice models: 56 speech and language models benchmarked across 10 languages, with each session sent to the one that actually wins.
Also: API, Voice Agents
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AgentCall
Free, fully on-device voice loop for AI coding agents — talk to Claude Code, Cursor or Codex and hear them answer back out loud.
Also: Developers, Voice Agents
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Tatva Labs Inc.
Continuous automated QA for voice and chat AI agents, from pre-launch simulation to live call monitoring.
Also: Developers, Voice Agents
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Integration layer for AI agents: managed OAuth, 10,000+ prebuilt tools across 3,000+ APIs, an MCP server and an API proxy. Owned by Workday.
Also: API, Developers
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Headless browser infrastructure for AI agents — sessions, stealth, proxies, and live view, without running Chrome yourself.
Also: API, Developers
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LangGenius
An open-source platform for building production LLM applications — visual workflows, RAG, and agents in one place.
Also: API, Developers
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Google
Google's browser workbench for prototyping with Gemini models, then shipping the same prompt as production API code.
Also: API, Developers