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Retell AI vs Vapi

Side-by-side on funding, valuation, status, and the rest of the FOBI roster.

Voice & Conversational Interfaces

Retell AI

Retell AI provides APIs and SDKs for building conversational voice agents with sub-800ms latency and built-in telephony support.

Voice & Conversational Interfaces

Vapi

Vapi provides a developer platform for building and deploying voice AI agents with sub-second latency and flexible integrations.

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Field	Retell AI	Vapi
Status	Private	Private
Sector	Voice & Conversational Interfaces	Voice & Conversational Interfaces
Subsector	Voice Agent Infrastructure	Voice Agent Infrastructure
Founded	2023	2023
HQ	San Francisco, United States	San Francisco, United States
Headcount	11-50	51-200
Total raised	$4.6M	$72M