Vapi
Everyday calls. Extraordinary outcomes.
Vapi is a voice AI platform for building, testing, and deploying voice agents at scale, positioned as the infrastructure layer for phone and web voice interactions rather than a single agent product - it orchestrates speech-to-text, LLMs, and text-to-speech providers behind one API.
Core capabilities
Vendor's own claim- Build, test, and deploy voice assistants via dashboard (no-code) or API/SDKs
- "Squads" for orchestrating multiple assistants in a single call flow
- Bring-your-own or Vapi-hosted speech-to-text, LLM, and text-to-speech providers
- Telephony integration for inbound/outbound phone calls plus web/mobile voice SDKs
- Real-time call monitoring, transcripts, and analytics
- Tool-calling / function-calling support for assistants to trigger external actions
- Hosted MCP server exposing assistants, calls, phone numbers, and tools to AI clients
API & agent surface
From official docs- Authentication
- API key (private key) sent as Bearer token in the Authorization header
- Base URL
- https://api.vapi.ai
- Notable endpoints
- GET /assistant - list assistants for the authenticated org
- POST /call - create/schedule an outbound call
- GET /call/{id} - get call status and details
- MCP tools exposed
- list_assistantscreate_assistantget_assistantlist_callscreate_callget_calllist_phone_numbersget_phone_numberlist_toolsget_tool
- Machine-readable spec
- OpenAPI spec retrieved
Pricing
From official docs| Plan | Price | Included | Notable |
|---|---|---|---|
| No Success Package | Usage-based, plus provider costs | $5 free credits; 4 concurrent calls; 2 organizations; 1 Vapi phone number; 14-day raw-data retention | Full platform access, Discord peer support, Email support without SLA |
| Core | $29/month plus usage | 10 concurrent calls; 2 organizations; 5 Vapi phone numbers; 30-day raw-data retention | ZDR included, Email support, 2-business-day response SLA |
| Pro | 10% of Vapi hosting fee, $999/month minimum | 30 concurrent calls; 10 organizations; 10 Vapi phone numbers; 180-day raw-data retention | RBAC and ZDR, Email and dedicated Slack support, 1-business-day response SLA |
| Premier | Contact Sales | — | Custom capacity and retention, Custom RBAC, ZDR, and SSO, 99.9% uptime SLA |
Checked 2026-07-31 against their pricing page. Vendors change pricing without notice.
What is Vapi
Vendor's own claimVapi is an API-first voice AI platform: developers configure assistants (model, voice, transcriber) and either place/receive calls through Vapi's telephony or embed voice into web and mobile apps via SDK. It publishes a documented REST API with an OpenAPI 3.0 specification, plus a hosted MCP server for connecting AI coding/chat clients directly to a workspace's assistants and call data.
Ideal customer profile
Vendor's own claimDevelopment teams building voice-agent products or embedding voice into an existing product (support, lead qualification, scheduling) who want an API/SDK layer over multiple STT/LLM/TTS providers rather than building that orchestration themselves. The vendor's own marketing leans toward enterprise-scale phone-support and outbound use cases.
Who should look elsewhere
Our readUsage is metered per minute ($0.05/min Vapi platform fee alone, before model/voice provider costs), plus a $10/month charge per concurrent call line above the 10 included - so high-concurrency, high-volume deployments accumulate real infrastructure cost on top of per-minute AI provider billing. Compliance add-ons are priced separately and steeply (HIPAA $2,000/mo, Zero Data Retention $1,000/mo on top of the base plan), which prices out small teams that need those guarantees. Teams wanting a single fixed-price seat license rather than usage-based billing, or wanting a fully managed voice-agent product rather than an API they configure themselves, are not the target.
Vapi alternatives
Our readPlatforms for building and running conversational voice agents that place or answer phone calls.
Category: Voice AI agents. Membership is decided by 2 stated tests, not by category tags — see them and the full comparison.
Appears in comparison shortlists
Vapi FAQ
Does Vapi have a documented REST API with an OpenAPI spec?
Yes.
How is Vapi priced?
Vapi offers usage-only billing with $5 free credits, 4 concurrent calls, and optional success packages. Core is $29/month with 10 concurrent calls. Pro is 10% of Vapi hosting fees with a $999/month minimum and 30 concurrent calls. Provider costs and optional add-ons are separate.
Are compliance features like HIPAA included?
HIPAA compliance is a $2,000/month add-on. Zero Data Retention is included with the addition of any success package, including Core at $29/month.
Can I use my own LLM/voice provider API keys?
Yes - the pricing page states model provider costs are passed through at cost, and are free if you bring your own API key for that provider.
Does Vapi support phone calls or only web voice?
Both. Vapi supports inbound/outbound telephony (no-code assistant creation from the dashboard) and web/mobile voice integration via SDKs.
What are Vapi's API rate limits?
Not documented in the pages we retrieved.
Verify before you buy
- Vapi pricing fields checked 2026-10-15. Scope: pricing fields only.
- API rate limits
- Exact per-minute rates for the Scale plan (requires contacting sales)
- Official agent-skill or OSS SDK repos beyond the general Vapi GitHub org
Need help setting it up?
This page tells you whether Vapi fits. Cheetah builds and runs the system it goes into — enrichment, sequencing, CRM and the joins between them.
Book a call →The directory stays free. There is nothing gated behind this.