AgentStack REI

Vapi

Developer voice-agent platform that bills $0.05/min hosting plus pass-through model, transcription, voice, and telephony costs.

Price

Usage-only from $0 to start, then $0.05/min Vapi hosting plus provider costs; optional Core success package $29/month

Pricing page example for 1,000 minutes/month was $82-$129/mo depending on transcriber, LLM, and voice. Free/usage-only includes $5 credits, 4 concurrent calls, 1 Vapi number, 14-day raw data retention. Core is $29/month with 10 concurrent calls and 5 numbers. Pro is 10% of Vapi hosting with a $999/month minimum. Vapi Telephony/SIP transport was listed as free in the estimator.

Free trial: $5 free credits to get started; no success package required.

Price checked Nov 13, 2026 · source

Visit vapi.ai →

What it can do

  • Host inbound and outbound voice agents with a full model catalog
  • Testing and simulation, monitoring, phone numbers, and API control
  • Add Core or Pro success packages for more concurrency, retention, and support SLAs

What it can't do / limits

  • Usage-only plan is limited to 4 concurrent calls, 2 organizations, 1 included number, and 14-day raw data retention
  • Hosting fee is only part of the bill; LLM, STT, and TTS are pass-through at provider cost
  • You build and operate the agent; not a prebuilt investor caller
  • Same TCPA consent limits on AI outbound voice as other voice platforms

Who it fits

Technical investors or agencies building custom inbound qualification and consented outbound voice workflows.

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