AI voice agents · Head to head
Vapi vs Retell — raw control or a builder that ships
Updated 2026-09-20 · markdown mirror
Verdict
Retell for most teams: a visual builder, inbound and outbound coverage, and per-minute pricing that needs no platform tax. Vapi for engineering teams that want direct control over models, telephony, and latency, and will write the code that control demands.
| Vapi | Retell | |
|---|---|---|
| Best for | engineering teams that want raw control over models, telephony, and latency | most teams, inbound and outbound voice agents with a visual builder and per-minute pricing |
| Free tier | $5 in free credits Documented at the source Checked 2026-09-20 vapi.ai /pricing | $10 in free credits Documented at the source Checked 2026-09-20 www.retellai.com /pricing |
| Paid from | $0/mo Documented at the source Checked 2026-09-20 vapi.ai /pricing Usage-based per-minute platform fee on top of provider costs, confirm rates | $0/mo Documented at the source Checked 2026-09-20 www.retellai.com /pricing Usage-based per-minute pricing with free trial credits, confirm rates |
| Inbound calls | Yes Unconfirmed — in the claim queue Checked 2026-09-20 vapi.ai | Yes Unconfirmed — in the claim queue Checked 2026-09-20 www.retellai.com |
| Outbound campaigns | Yes Unconfirmed — in the claim queue Checked 2026-09-20 vapi.ai | Yes, phone campaigns Documented at the source Checked 2026-09-20 www.retellai.com |
| No-code builder | Workflows dashboard, but API-first Unconfirmed — in the claim queue Checked 2026-09-20 vapi.ai | Yes, visual workflow builder Documented at the source Checked 2026-09-20 www.retellai.com |
| AI crawler policy | open Tested by us Checked 2026-09-20 /ai-voice-agents/benchmarks/ai-voice-agents-ai-crawler-access/ Our benchmark (n=4 tools × 3 runs) — methodology on the benchmark page | open Tested by us Checked 2026-09-20 /ai-voice-agents/benchmarks/ai-voice-agents-ai-crawler-access/ Our benchmark (n=4 tools × 3 runs) — methodology on the benchmark page |
● tested by us · ● documented at the source · ● unconfirmed, queued in /confirm.txt — hover or tap a dot for the source and date
The actual difference
Both platforms answer calls, sound convincingly human, and bill by the minute. The philosophy diverges at the abstraction line. Retell abstracts the hard parts (models, speech, telephony) behind a visual builder so a business team ships an agent in an afternoon. Vapi exposes those parts so an engineering team optimises them. Neither is “more advanced”: one sells speed to first agent, the other sells the ceiling after that.
Pricing, honestly
Both are usage-based with trial credits, and both pass through underlying model and telephony costs, so a naive per-minute comparison lies. What we publish as dated claims: each platform’s stated rates and credit terms on its own pricing page, linked above. What we refuse to publish: a total cost per minute we have not verified end to end. Model your average call length before choosing; the winner at 90 seconds may lose at 3 minutes.
Team shape decides this
A product manager with a flowchart ships faster on Retell, full stop. A backend engineer with opinions about latency and providers will fight Retell’s abstractions inside a fortnight and be productive in Vapi the same afternoon. Choose by who maintains the agent after the demo, because someone will maintain it forever.
Our verdict in one line each
Retell until you hit a ceiling. Vapi once you know exactly which ceiling you are buying your way out of.
FAQ
Is Vapi or Retell better for beginners?
Retell. Its visual workflow builder covers inbound receptionists and outbound campaigns without code. Vapi assumes developers; the fastest path to a working agent is reading its API documentation, not clicking its dashboard.
Which is cheaper, Vapi or Retell?
Both bill usage-based per minute of call time with free trial credits, and both pass through model and telephony costs. The honest answer is that per-minute rates move and stack differently by use case; check the sourced numbers on each profile page, and model your own call length before deciding.
Can both handle inbound and outbound calls?
Yes; inbound receptionists and outbound campaigns are supported on both. The differences are in campaign tooling depth, transfer behaviour, and how much of the stack you can replace.
Which platform gives more control over models and telephony?
Vapi. Choosing your own speech and model providers, and wiring your own telephony, is its reason to exist. Retell abstracts those choices in exchange for shipping speed.