Comparison · AI agents
Retell AI vs Vapi
Retell AI and Vapi both target developers building voice agents. Both are pay-as-you-go and composable. The differences come down to compliance posture and pricing transparency.
Side-by-side
Pick Retell AI if
- You're in a regulated industry — Retell includes SOC 2 Type II on the pay-as-you-go tier
- You want transparent per-component pricing (Retell breaks out voice infra, TTS, LLM, KB add-ons)
- You'll BYO LLM and TTS provider and don't want to fight the platform over it
Pick Vapi if
- You need the deepest configuration surface — Vapi documents 4,200+ config points
- You want the largest community and most third-party integrations
- You're optimising for raw latency — Vapi's sub-500ms infra is widely benchmarked
The verdict
Retell and Vapi are the two strongest infrastructure-tier voice agent platforms for builders, and the choice is genuinely close. Retell wins on compliance for SMBs in regulated industries — SOC 2 Type II is included on the entry tier rather than gated to enterprise. Vapi wins on raw configurability and community depth. Pricing is comparable: Retell is roughly $0.07-$0.31/min depending on LLM and TTS choices; Vapi is per-minute usage-based at similar rates. If you're in healthcare, finance, or a regulated SaaS, Retell's compliance posture is the cleaner default. If you're building a voice-first product where you'll want unusual configuration (custom interruption handling, specific TTS voices, multi-agent routing), Vapi's deeper surface is worth the slightly thinner compliance story. Both have public APIs and similar telephony integrations (Twilio for both, plus Vonage on Retell). Neither has Zapier, neither ships an MCP server yet — at this layer of the stack, neither is necessary.
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