Voice agent platforms for building your own
Voice agent platforms give you the parts to build your own phone agent: speech recognition, a language model, a voice, telephony and the logic that ties them together. They're priced by the minute, and the headline rate often leaves some of them out.
12 vendors, checked against vendor sources as of October 15, 2026.
Compare voice agent platforms
12 vendors
| Vendor | Charges by | Starts at | HIPAA BAA | Checked |
|---|---|---|---|---|
| Bland AI | Usage-based | Free tier | Yes | Oct 2026 |
| ElevenLabs Agents (ElevenAgents) | Usage-based | Free tier | Yes | Oct 2026 |
| Kore.ai | Quote only | Quote | Unconfirmed | Oct 2026 |
| LiveKit | Usage-based | Free tier | Yes | Oct 2026 |
| Millis AI | Usage-based | $0.02/min | Unconfirmed | Oct 2026 |
| NiCE CognigyAcquired | Quote only | Quote | Unconfirmed | Oct 2026 |
| Retell AI | Usage-based | Free tier | Yes | Oct 2026 |
| Synthflow | Usage-based | $2,500/mo | Yes | Oct 2026 |
| Thoughtly | Quote only | Quote | Yes | Oct 2026 |
| Vapi | Usage-based | Free tier | Yes | Oct 2026 |
| VoiceAIWrapper | Flat monthly | Free tier | Unconfirmed | Oct 2026 |
| Voiceflow | Usage-based | Quote | Unconfirmed | Oct 2026 |
Reading a per-minute price
A platform's per-minute rate may or may not include the language model, the text-to-speech voice and the phone line. Some bundle everything; others charge each part separately at cost. We record what each vendor says is included.
Agencies use these platforms to build AI receptionists and outbound agents for clients. Where a platform supports white-labeling, we note it.
What to check
- All-in cost per minute
- Platform fee plus model, voice and telephony charges.
- Latency and voices
- Which speech and voice providers you can choose.
- Telephony
- Bring your own Twilio or SIP trunk, or buy numbers through the platform.
- Compliance
- HIPAA BAA and SOC 2 for regulated use.
Questions
How do voice agent platforms charge?
By usage-based (8), quote only (3), flat monthly (1). The cheapest option depends on how many calls you get and how long they last.