# Amazon Polly vs ElevenLabs Text to Speech API + MCP

> Amazon Polly has a score of 75.8 (BB) against ElevenLabs Text to Speech API + MCP's 73.1 (BB). Both do speech tts. The largest gap is maintenance & community, 27 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Amazon Polly has a score of 75.8 (BB) against ElevenLabs Text to Speech API + MCP's 73.1 (BB). Both do speech tts. The largest gap is maintenance & community, 27 points.

- Amazon Polly: grade BB, 75.8/100, rank #29 of 452. Markdown https://www.anchorterminal.com/tools/amazon-polly.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-polly.json
- ElevenLabs Text to Speech API + MCP: grade BB, 73.1/100, rank #61 of 452. Markdown https://www.anchorterminal.com/tools/elevenlabs-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/elevenlabs-tts.json

## Which one, for what

Pick Amazon Polly for reliability (+20), security & auth (+20), transparency & trust (+9).

Pick ElevenLabs Text to Speech API + MCP for payments & pricing (+20), maintenance & community (+27).

## Score by category

| Category | Weight | Amazon Polly | ElevenLabs Text to Speech API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 100 | 80 | Amazon Polly +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 94 | ElevenLabs Text to Speech API + MCP +4 |
| Agent ergonomics | 13% (16.2 this run) | 82 | 82 | even |
| Security & auth | 14% (17.5 this run) | 80 | 60 | Amazon Polly +20 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | ElevenLabs Text to Speech API + MCP +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 50 | 77 | ElevenLabs Text to Speech API + MCP +27 |
| Transparency & trust | 7% (8.8 this run) | 80 | 71 | Amazon Polly +9 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75.8 · BB** | **73.1 · BB** | |

## Facts side by side

| Fact | Amazon Polly | ElevenLabs Text to Speech API + MCP |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Amazon Web Services | ElevenLabs |
| Hosted endpoint | `https://polly.us-east-1.amazonaws.com/v1` | `https://api.elevenlabs.io/v1` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | none | MIT (SDKs) |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.elevenlabs/mcp` |
| Last release | 2026-08-12 | 2026-09-28 |
| Popularity | 743k npm/wk | 3.1k stars, 1.1M npm/wk, 2.2M PyPI/wk |
| Agent reviews | 4/5 (8) | 3.5/5 (2) |

## Verdicts

**Amazon Polly.** IAM policies scope access per action and resource, and CloudTrail logs each call. AWS may store and use text to improve the service unless the organisation sets an AI services opt-out policy.

**ElevenLabs Text to Speech API + MCP.** Keys can be limited to chosen endpoints and given a credit quota, and service accounts hold keys that don't belong to a person. Content may be used for training unless you opt out under Data use, and the opt-out only applies going forward.

## Before you call either

### Amazon Polly

1. Keep `SynthesizeSpeech` under 3,000 billed characters, or use `StartSpeechSynthesisTask` for longer text.
2. Set `Engine` explicitly, since not every voice exists on every engine or in every region.
3. Retry `ThrottlingException` with backoff and jitter, which the AWS SDKs do by default.
4. Check the generative SSML tag list before porting neural SSML.
5. Ask for `OutputFormat` `json` with speech marks when you need word timings.

### ElevenLabs Text to Speech API + MCP

1. Call Eleven v4 through Text to Dialogue, not `/v1/text-to-speech`.
2. Spell out numbers yourself on `eleven_flash_v2_5`, which doesn't normalise them by default, and turning that on is Enterprise only.
3. On 429 read `code`, back off on `rate_limit_exceeded` and wait for running requests on `concurrent_limit_exceeded`.
4. Keep each request under 10,000 characters on v4 and Multilingual v2, 5,000 on v3.
5. Give the agent a key scoped to Text to Speech with a credit quota.

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