Independent · sourced · Updated June 2026
Best AI Voice Agents (2026)
The cheapest ai voice agents is Bland AI at $0/mo. 4 offer a free tier (Bland AI, Retell AI, Synthflow). This page compares 4 options on entry price, free tier, HIPAA/SOC 2 and best-for — every figure linked to its source, updated June 2026.
4 options compared on price, free tier, compliance and fit — ranked cheapest-first. Every figure links to the vendor's own page and the date we captured it; quote-only tiers show “—”, never a guess.
Key takeaways
- Cheapest: Bland AI at $0/mo (Start).
- Free tier: Bland AI, Retell AI, Synthflow, Vapi.
- HIPAA-ready: Bland AI, Retell AI, Synthflow, Vapi.
- Tracked: 4 vendors, data current through 2026-06-15.
Comparison
| # | AI Voice Agent | Entry price | Free | HIPAA | SOC 2 | Best for | Source |
|---|---|---|---|---|---|---|---|
| 1 | Bland AI | $0/mo Start | Yes | Yes | Yes | contact-centers | bland.ai |
| 2 | Retell AI | $0/mo Pay-as-You-Go | No | Yes | Yes | developers | retellai.com |
| 3 | Synthflow | $0/mo Pay As You Go | Yes | Yes | Yes | agencies | synthflow.ai |
| 4 | Vapi | $0/mo Build | Yes | Yes | Yes | developers | vapi.ai |
Prices are the lowest published self-serve monthly rate as captured on the linked source. Annual-billing and usage details are on each vendor's record in our open dataset.
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Frequently asked questions
What is the cheapest ai voice agents?
Bland AI has the lowest published entry price at $0/mo (Start), as of 2026-06-15.
Which ai voice agents have a free plan?
Bland AI, Retell AI, Synthflow, Vapi offer a free tier.
Which ai voice agents support HIPAA?
Bland AI, Retell AI, Synthflow, Vapi state HIPAA support (a BAA). Always confirm current scope with the vendor.
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How we compiled this
Official pricing pages were fetched directly for Vapi (vapi.ai/pricing, security.vapi.ai), Retell AI (retellai.com/pricing, docs.retellai.com/general/compliance), Bland AI (bland.ai/pricing, bland.ai/integrations), and Synthflow (synthflow.ai/pricing). Two vendors were REMOVED as not purchasable: (1) Air AI — the autonomous voice agent is defunct (services dark since late 2024; FTC complaint Aug 2025; March 2026 settlement with $18M judgment), and the air.ai domain now hosts an unrelated military/defense platform whose FedRAMP/IL5 certs do not belong to the voice product. (2) PlayAI — acquired by Meta July 2025, API shut down 2025-07-26, platform retired 2025-12-31; play.ai/pricing returns connection-refused and no plan can be purchased. billingModel='per_minute' for all retained vendors because all charge usage-based per-minute rates; monthlyUsd carries the published platform/seat fee where one exists and is null for contact-sales tiers. accessedAt 2026-06-15.
Last verified 2026-06-15. We re-check published prices and compliance on a recurring cadence and update this page when they change.
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