Voice AI & Phone Agents
Voice synthesis, cloning, and conversational voice for products that sell voice as the core capability. 9 tracked on AgentsIndex, with pricing and licences checked.
9 listed5 freeavg $2/month
Reviewed by AgentsIndex · Updated Aug 16, 2026
The Voice AI Agents catalog on AgentsIndex lists 9 tools built for this job. Most are built for developers, researchers, small teams. Entry pricing is at the cheap end of the index — a median of $3/mo against $20/mo — so the cost of being wrong is low. Open source is rarer here than elsewhere on the index — 0 of 9, against 26% overall — so most choices are a vendor relationship rather than a repository.
Voice AI Agents compared
The 8 most-used tools in this category, by published pricing. Everything we know about each one is on its listing.
| Tool | Price from | Free tier | Deployment & compliance |
|---|---|---|---|
| Bland AI | $0.11/mo | Not stated | Self-Hosted · GDPR · SOC 2 · HIPAA |
| Synthflow | Free | Yes | GDPR · SOC 2 · HIPAA · ISO 27001 |
| Vapi | Build Usage based | Not stated | BYOK · SOC 2 · HIPAA |
| Retell AI | Free | Yes | GDPR · SOC 2 · HIPAA |
| Voiceflow | $49/mo | Yes | — |
| Deepgram | $0.3333333333333333/mo | Yes | Self-Hosted · GDPR · SOC 2 · HIPAA |
| ElevenLabs | $6/mo | Yes | HIPAA · Self-Hosted · SOC 2 |
| Dial | $3/mo | Not stated | GDPR |
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