Vapi
Voice AI — Speech, Synthesis & Conversation
Last updated · Compiled from public sources with automated enrichment
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Developer platform for building voice AI agents.
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- Category
- Voice AI — Speech, Synthesis & Conversation
- Founded
- 2023
- Status
- Active
- Open source
- No
- Pricing
- Freemium
- Funding stage
- Seed
- Total raised
- —
- Popularity
- Rising
- Modality
- Audio
- GitHub stars
- —
Relationships
2 of 7 confirmed by two independent sources, 5 under review · 7 backed by a published source.
- AssemblyAIBoth offer voice AI development platforms.
- PlayAIPlayAI competes with Vapi in voice AI agents.
- Retell AIRetell AI competes with Vapi.
- Rime AIRime AI competes with Vapi in voice AI development.
- WellSaid LabsBoth focus on building voice AI agents.
- CartesiaVapi uses Cartesia's low-latency Sonic text-to-speech models.
- SpeechmaticsVapi uses Speechmatics for speech recognition in voice agents.
References
Published sources supporting the relationships above.
- 5 Best Voice AI APIs for Developers (Beyond Vapi & ElevenLabs)
unknown publisher · supports Vapi competes with Rime AI
- Vapi - Rime Docs
unknown publisher · supports Vapi competes with Rime AI
- 11 Great ElevenLabs Alternatives: Vapi-Native TTS Models - Vapi AI Blog
unknown publisher · supports Vapi competes with Rime AI
- vapi and assemblyai - Which undefined Platform Is Better in August 2026?
unknown publisher · supports AssemblyAI competes with Vapi
- AssemblyAI vs Vapi: Pricing, Demos, and Features Compared | Morak
unknown publisher · supports AssemblyAI competes with Vapi
- AssemblyAI & Vapi
unknown publisher · supports AssemblyAI competes with Vapi
- Best Speech-to-Speech Voice Agent API in 2026 | AssemblyAI
unknown publisher · supports AssemblyAI competes with Vapi
- 10 Best ElevenLabs Alternatives (2026)
unknown publisher · supports WellSaid Labs competes with Vapi
- WellSaid Labs Alternative 2026: Why CallSphere Wins on End-to-End Agentic AI and Migration Done For You | CallSphere Blog
unknown publisher · supports WellSaid Labs competes with Vapi
- Vapi and Speechmatics: Build agents that understand every voice
unknown publisher · supports Vapi uses Speechmatics
- Speechmatics | Vapi
unknown publisher · supports Vapi uses Speechmatics
- Vapi integration | Speechmatics Docs
unknown publisher · supports Vapi uses Speechmatics
- Vapi adds Speechmatics for multilingual voice agents | Speechmatics posted on the topic | LinkedIn
unknown publisher · supports Vapi uses Speechmatics
- Compare PlayAI vs. Vapi AI in 2026
unknown publisher · supports PlayAI competes with Vapi
- Retell AI vs Vapi (2026): Which Wins? | Famulor Blog
unknown publisher · supports Retell AI competes with Vapi
- Vapi vs Retell: Find the Best Alternative for AI Phone Agents
unknown publisher · supports Retell AI competes with Vapi
- Retell AI vs VAPI: Which Voice Agent Platform Should You Actually Build On? - DEV Community
unknown publisher · supports Retell AI competes with Vapi
- Vapi chooses Cartesia as their default provider for voice agents | Karan Goel
unknown publisher · supports Vapi uses Cartesia
- Vapi x Cartesia: Ultra-Realistic Voice AI with Sonic 2.0 - Vapi AI Blog
unknown publisher · supports Vapi uses Cartesia
- Vapi on X: "We’re super stoked to integrate with partners like @cartesia — value add to the builders, value add to the customers, and value add to our shared slack channel
😉❤️🤝" / X
unknown publisher · supports Vapi uses Cartesia
News
- AI voice startup Vapi hits $500M valuation after winning Amazon Ring over 40 rivals - TechCrunchTechCrunch · 5/12/2026
- Vapi - ForbesForbes · 1/1/2026
- Big Talk: How Vapi Plans To Solve Customer Service With Voice AI - ForbesForbes · 12/12/2024
More in Voice AI — Speech, Synthesis & Conversation
- AssemblyAISpeech-to-text and audio intelligence API platform.
- Bland AIPlatform for building automated AI phone-call agents.
- CartesiaReal-time generative voice AI platform built on state-space models.
- DeepgramSpeech-to-text API platform focused on speed and accuracy.
- DescriptAudio/video editor with AI voice cloning (Overdub) and transcription.
- ElevenLabsLeading text-to-speech and voice-cloning AI platform.
- Hume AIAI platform focused on emotional expression in voice and language.
- LOVO AIAI voiceover and synthetic voice generation platform.
- Murf AIAI voiceover and text-to-speech platform for content creators.
- Neets.aiLow-cost text-to-speech API platform.
- Play.htText-to-speech platform offering realistic AI voice generation.
- PlayAIConversational voice AI agent platform (from the Play.ht team).