Companies
The companies building AI agents that make and receive phone calls — and the infrastructure underneath.
13 companies
AgentPhone.ai
AI voice agents for phone calls
Seed—
AssemblyAI
Speech-to-text and audio intelligence API
Series C$63M
Bland AI
Enterprise platform for AI phone calls
Series B$85M
Cartesia
Real-time multimodal AI models
Series A$91M
Deepgram
Voice AI platform with speech-to-text foundation
Series B$86M
ElevenLabs
AI voice generation and synthesis
Series C$281M
PolyAI
Customer-led conversational AI for enterprise call centers
Series C$120M
Retell AI
Conversational voice API for real-time AI agents
Seed$4.6M
Sonari
Real-time voice QA and call analytics
Acquired$28M
Synthflow
No-code AI voice agent builder
Seed$10.5M
Telnyx
Programmable communications and voice infrastructure
Series B$32M
Twilio
Communications platform with growing voice AI footprint
Public$614M (pre-IPO)
Vapi
Developer platform for voice AI agents
Series A$23M