Vapi vs Retell
Two AI voice agent platforms, priced per component rather than one flat rate, with different strengths on inbound quality and provider control.
Choose Retell when inbound call quality and low latency matter most, like an AI receptionist answering live callers. Choose Vapi when developer control over which language model, voice and telephony provider goes into the stack matters more than a tuned-out-of-the-box inbound experience.
The short answer
- Neither platform charges one flat per-minute rate: both bill the voice-agent layer separately from the language model, text-to-speech, speech-to-text and telephony that plug into it, and each of those is its own line item.
- Retell is generally seen as the stronger performer on inbound call quality and latency, which shows up most on calls where someone is actively waiting, like a receptionist line.
- Vapi is generally seen as the stronger platform for developer and agency control, letting a team choose and swap the model, voice and telephony providers it uses more freely.
- Whichever platform runs the call, something else has to track what happened afterward, whether the lead was booked and what the disposition was, since neither platform is a CRM.
Vapi vs Retell at a glance
| Dimension | Vapi | Retell |
|---|---|---|
| Published starting rate | $0.05/min — platform hosting fee only | $0.055/min — voice infrastructure floor |
| What that rate excludes | Language model, TTS, STT and telephony, all billed separately at provider rates | Language model, TTS and telephony, all billed separately as additional components |
| Realistic all-in range | Roughly $0.10–$0.30/min depending on model and voice choice | Roughly $0.07–$0.31/min depending on model and voice choice |
| Where it's generally strongest | Developer and agency control: choice of LLM, voice and telephony provider | Inbound call quality and latency |
| Provider flexibility | Broad; built to let a team swap providers per component | Available, though the platform leans toward a more opinionated default stack |
| Best-fit use case | Teams that want to tune every layer of the stack themselves | Teams that want strong inbound performance without deep per-component tuning |
Rates from each vendor's own pricing page, verified as of September 2026 (vapi.ai/pricing, retellai.com/pricing). Both explicitly exclude LLM, TTS and telephony costs from the published starting rate; the realistic all-in range reflects third-party cost breakdowns layering those components on top, not either vendor's own quoted total.
Where each platform holds up, and where it doesn't
Vapi
- Strong control over which LLM, TTS and telephony provider power the agent
- Popular with developers and agencies building custom voice workflows
- The $0.05/min headline rate covers hosting only; the real bill depends entirely on provider choices made afterward
- That flexibility means more configuration decisions before a stack performs well out of the box
Retell
- Generally regarded as strong on inbound call quality and latency
- No separate platform fee structure; pricing is built around components from the start
- The $0.055/min figure is a voice-infrastructure floor, not the full cost; LLM and TTS still add on top
- Less emphasis on the deep provider-swapping control that Vapi is built around
How to choose
Start with what the calls are actually for. If the agent is answering inbound calls, a receptionist line where a real person is on hold waiting for a response, latency and call quality compound with every extra hundred milliseconds, and that's the dimension Retell is generally strongest on. If the calls are outbound and the priority is building a specific workflow, choosing exactly which model reasons about the call and which voice speaks it, Vapi's provider flexibility is the more useful strength.
Either way, price the whole stack before comparing the two platforms' headline rates against each other. Both numbers on the pricing page describe only their own layer: the orchestration or voice-infrastructure cost. Add the language model calls, the text-to-speech engine and the telephony minutes each requires, and the two platforms' real all-in cost per minute lands in the same rough range, currently reported as roughly $0.07 to $0.31 a minute depending on configuration, not the $0.05 or $0.055 figure either one leads with.
Whichever platform wins the choice, plan for something behind it to catch the outcome: the disposition, the booking, the follow-up task. A voice agent that answers well but writes the result nowhere is a call log, not a pipeline.
Pricing changes; verify before you commit
Questions
- Can you use both Vapi and Retell?
- Yes, and some teams do, running one platform for outbound campaigns and the other for inbound, or trialling both against the same use case before committing. Neither platform locks a business into exclusivity, and since both bill per component rather than a flat subscription, running a small pilot on each is a realistic way to compare real call quality before choosing.
- What does a voice agent actually cost per minute?
- More than either platform's headline number by itself. Vapi's published $0.05 per minute is its own hosting fee only; Retell's $0.055 per minute is a voice-infrastructure floor. Both then add the language model, text-to-speech, speech-to-text and telephony as separate, usage-based costs on top, so the number on the pricing page is a starting point, not the bill. Verified with each vendor's own pricing page as of September 2026; see the table note below.
- Which platform has lower latency?
- Retell is generally regarded as the stronger performer on latency and inbound call quality specifically, which matters most for calls where a caller is actively waiting on the other end, like an inbound receptionist line. Vapi's strength runs in a different direction: control over which providers plug into the stack.
- Do I need a CRM behind either platform?
- Yes, in practice. Both Vapi and Retell build and run the voice agent itself, the part of the call that listens, decides and speaks. Neither is the system of record that tracks what happened after the call: whether the lead was booked, what the disposition was, and what happens next. That's a separate piece of the stack, whichever voice platform is chosen.