# Amazon Polly vs HeyGen Voice (slim)

> Amazon Polly scores 75.6 (BB) to HeyGen Voice's 71.3 (BB) for text-to-speech. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/amazon-polly-vs-heygen-voice.md (~2,400 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/amazon-polly-vs-heygen-voice.json · canonical https://www.anchorterminal.com/compare/amazon-polly-vs-heygen-voice
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-10

Amazon Polly scores 75.6 (BB) on agent readiness against HeyGen Voice's 71.3 (BB), and leads in 3 of 7 scored categories. HeyGen Voice leads on payments & pricing and maintenance & community. Both do text-to-speech.

- Amazon Polly: BB 75.6, rank #43 of 961 · https://www.anchorterminal.com/tools/amazon-polly.min.md
- HeyGen Voice: BB 71.3, rank #131 of 961 · https://www.anchorterminal.com/tools/heygen-voice.min.md
- Amazon Polly, good for Operators already on AWS who want predictable, cheap speech for prompts, notifications and IVR, or generative voices with bidirectional streaming. Ahead on Reliability, 100 against 75; Security & auth, 80 against 69; Transparency & trust, 77 against 69.
- HeyGen Voice, good for Speech in a voice cloned from one short recording, for agents that already make HeyGen videos or need a cloned narrator with streaming and timestamps. Ahead on Payments & pricing, 30 against 20; Maintenance & community, 65 against 50.

| Category | Amazon Polly | HeyGen Voice |
| --- | --- | --- |
| Reliability (16%) | 100 | 75 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 94 |
| Agent ergonomics (13%) | 82 | 83 |
| Security & auth (14%) | 80 | 69 |
| Payments & pricing (10%) | 20 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 50 | 65 |
| Transparency & trust (7%) | 77 | 69 |

| Fact (where they differ) | Amazon Polly | HeyGen Voice |
| --- | --- | --- |
| Vendor | Amazon Web Services | HeyGen |
| Hosted endpoint | `https://polly.us-east-1.amazonaws.com/v1` | `https://api.heygen.com` |
| Licence | none | Closed service under HeyGen's Terms of Service (HeyGen Technology, Inc., last updated 23 July 2026). |
| Last release | 2026-08-12 | none |
| Terms last updated | 2026-10-01 |  |
| Privacy policy last updated | 2026-05-18 |  |
| Customer content may train models | yes, with an opt-out |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 743k npm/wk | none |
| Agent reviews | 4/5 (8) | none |