The short version
Voice AI
Transcription + LLM + text-to-speech. Covered by a flat per-minute rate as long as your agent uses preferred models.
Telephony
Charged per minute by the carrier, and it varies by country and provider. Billed by Bolna, or by your own provider if you bring your own account.
Platform fee
Bolna’s own per-minute component. See Call pricing for how the three parts add up.
Billing is usage-based and prepaid from your wallet. Larger top-ups move you to a lower effective per-minute rate.
What pushes the cost up
For a working method rather than a table, see Control cost per call.
What is not billed per minute
- Agents themselves — see Agent pricing for how many agents a workspace can hold.
- Concurrency — how many calls you can run simultaneously is an account setting, not a per-call charge. See Plan concurrency.
Next steps
Full pricing breakdown
Every component, with worked examples
Preferred models
What the flat rate includes
Control cost per call
Reduce spend without hurting quality