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Intervo AI vs Vapi

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Intervo AI starts at $10, Vapi at $0.05. Only Intervo AI has a free tier. Both ship a public API.

Intervo AIOpen-source builder for voice and chat agents that answer calls, qualify leads and book meetings.VapiDeveloper platform for building and running voice phone agents, billed per minute of call time.

Side by side

FactIntervo AIVapi
CategoryVoice Agents & Phone AIVoice Agents & Phone AI
Pricing modelFreemiumPaid
Starts at$10 one_time$0.05 minute
Public APIYesYes
PlatformsWeb, APIWeb, API
CompanyCodedesign, Inc.Vapi Inc.
Launched—2020
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Intervo AI

One of the few voice agent platforms where you can read the source and move the whole thing in-house if the hosted pricing turns against you. Model and voice vendors are swappable rather than locked, which keeps per-minute costs negotiable. The catch is that the headline monthly price is quoted against a struck-through number, which is a discount that has been running long enough to be the real price.

Pros

  • Source is public on GitHub, so self-hosting is a real fallback rather than a promise
  • Model provider and voice engine are picked independently, covering OpenAI, Anthropic, Google, ElevenLabs and Azure
  • Integrations cover Intercom, Zapier, Google Sheets, Cal.com and generic webhooks out of the box
  • A free tier with three agents makes evaluation possible without a card

Cons

  • The 129 USD plan is displayed as a permanent discount off a much larger list price, so the real anchor is unclear
  • No country or registered address is published for Codedesign, Inc.
  • Self-hosting shifts integration, security and compliance costs onto you, as the vendor itself notes
  • Stated 90 to 95 percent accuracy is vendor-reported and conditioned on ideal audio

Vapi

The default answer when a developer needs a voice agent on a phone line rather than a chat widget: it handles the hard real-time parts — barge-in, latency, turn-taking, telephony — and lets you swap in your own models. Enterprise adoption at Ring and Intuit is real validation. Cost forecasting is the hard part, because the platform fee is only one of four meters running.

Pros

  • Handles real-time voice mechanics: turn-taking, interruptions, latency and telephony
  • Bring-your-own-key support across OpenAI, Anthropic and Google avoids double model markup
  • CRM and helpdesk integrations for Salesforce, HubSpot and Zendesk
  • SOC 2, HIPAA and PCI compliance plus SSO and RBAC on the enterprise tier
  • Proven at scale, with Amazon Ring routing inbound support volume through it

Cons

  • The $0.05/minute platform fee sits on top of speech, model and voice provider costs
  • Concurrency beyond ten lines costs $10 per line per month
  • Enterprise compliance features require an annual Scale contract
  • It is a developer platform, so there is no usable no-code path

Which one fits

Choose Intervo AI if you need

  • Agencies deploying the same agent template across many client accounts
  • Teams that want an exit route via self-hosting rather than vendor lock-in
  • Businesses needing calls handled in more than one language

Choose Vapi if you need

  • Developers building phone-based support, booking or qualification agents
  • Replacing IVR trees with something that actually listens
  • Teams that want to bring their own model and voice provider keys

More comparisons

All Intervo AI alternatives →Browse all Voice Agents & Phone AI →