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Vapi vs Ziddny

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. Vapi starts at $0.05, Ziddny at $5. Only Vapi ships a public API.

VapiDeveloper platform for building and running voice phone agents, billed per minute of call time.ZiddnyBuild talking 3D-avatar or voice-only assistants and embed them on your site, billed by conversation minute.

Side by side

FactVapiZiddny
CategoryVoice Agents & Phone AIVoice Agents & Phone AI
Pricing modelPaidPaid
Starts at$0.05 minute$5 month
Public APIYesNo
PlatformsWeb, APIWeb
CompanyVapi Inc.MechaPal
Launched20202024
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

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

Ziddny

The cheapest way in this category to put a talking avatar on a site - five dollars gets you a working assistant rather than a demo. Concurrency limits are the honest constraint: two simultaneous sessions on the entry plan means one busy hour will queue visitors. Vendor transparency is thin, with only a trading name and no company address anywhere in the policies.

Pros

  • Both 3D avatar and voice-only modes from the same configuration
  • Deploys as a website embed or a standalone shareable link
  • Entry plan is $5/month and includes five separate assistants
  • Overage is priced per minute rather than forcing a plan upgrade

Cons

  • Concurrent-session caps are low - two on the entry tier, ten on the $25 tier
  • No company country, address, or registration disclosed in the privacy policy
  • No documented API for embedding the agent in a native app
  • Minutes expire monthly, so light months are wasted spend

Which one fits

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

Choose Ziddny if you need

  • Small clinics or schools wanting a front-desk assistant on their homepage
  • Testing whether visitors engage with an avatar before committing budget
  • Training or onboarding kiosks that need voice rather than chat

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