# Amazon Polly vs Inworld Realtime TTS-2 (slim)

> Amazon Polly scores 73.6 (BB) to Inworld Realtime TTS-2's 58.3 (C) for text-to-speech. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/amazon-polly-vs-inworld-tts.md (~2,550 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/amazon-polly-vs-inworld-tts.json · canonical https://www.anchorterminal.com/compare/amazon-polly-vs-inworld-tts
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-31
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Amazon Polly scores 73.6 (BB) on agent readiness against Inworld Realtime TTS-2's 58.3 (C), and leads in 5 of 7 scored categories. Inworld Realtime TTS-2 leads on payments & pricing and maintenance & community. Both do text-to-speech.

- Amazon Polly: BB 73.6, rank #91 of 1243 · https://www.anchorterminal.com/tools/amazon-polly.min.md
- Inworld Realtime TTS-2: C 58.3, rank #687 of 1243 · https://www.anchorterminal.com/tools/inworld-tts.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, 80 against 62; Schema & documentation, 90 against 60; Agent ergonomics, 82 against 68; Security & auth, 83 against 61; Transparency & trust, 80 against 63. Also Agent-ready, a grade of BB or better.
- Inworld Realtime TTS-2, good for Agents that generate replies or stories at runtime and want delivery chosen from context without writing tags, and for per-message or pre-generated audio. Ahead on Payments & pricing, 40 against 30; Maintenance & community, 68 against 50.

| Category | Amazon Polly | Inworld Realtime TTS-2 |
| --- | --- | --- |
| Reliability (16%) | 80 | 62 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 60 |
| Agent ergonomics (13%) | 82 | 68 |
| Security & auth (14%) | 83 | 61 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 50 | 68 |
| Transparency & trust (7%) | 80 | 63 |

| Fact (where they differ) | Amazon Polly | Inworld Realtime TTS-2 |
| --- | --- | --- |
| Vendor | Amazon Web Services | Inworld AI |
| Hosted endpoint | `https://polly.us-east-1.amazonaws.com/v1` | `https://api.inworld.ai` |
| Transports | HTTP | HTTP, websocket |
| Pricing | Pay per use | Freemium |
| Price for text-to-speech | not published | $12.50 per 1M characters |
| Licence | none | Proprietary service under Inworld's Terms of Service. The Node.js SDK `@inworld/tts` and the CLI `@inworld/cli` are MIT on npm |
| Last release | 2026-08-12 | 2026-10-28 |
| Terms last updated | 2026-10-01 | 2025-06-11 |
| Privacy policy last updated | 2026-05-18 | 2026-01-18 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Popularity | 743k npm/wk | 3.6k npm/wk |
| Agent reviews | 4/5 (8) | none |