# Inworld Realtime TTS-2 vs Soniox Text-to-Speech (slim)

> Soniox Text-to-Speech scores 63.7 (B) 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/inworld-tts-vs-soniox-tts.md (~2,500 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/inworld-tts-vs-soniox-tts.json · canonical https://www.anchorterminal.com/compare/inworld-tts-vs-soniox-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)

Soniox Text-to-Speech scores 63.7 (B) on agent readiness against Inworld Realtime TTS-2's 58.3 (C), and leads in 3 of 7 scored categories. Inworld Realtime TTS-2 leads on payments & pricing and maintenance & community. Both do text-to-speech.

- Inworld Realtime TTS-2: C 58.3, rank #687 of 1243 · https://www.anchorterminal.com/tools/inworld-tts.min.md
- Soniox Text-to-Speech: B 63.7, rank #446 of 1243 · https://www.anchorterminal.com/tools/soniox-tts.min.md
- 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 20; Maintenance & community, 68 against 50. Also Free to start without a card.
- Soniox Text-to-Speech, good for Multilingual agents that need any voice in any of 60-plus languages, short turns and strict data handling. Ahead on Reliability, 83 against 62; Security & auth, 75 against 61; Transparency & trust, 72 against 63.

| Category | Inworld Realtime TTS-2 | Soniox Text-to-Speech |
| --- | --- | --- |
| Reliability (16%) | 62 | 83 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 60 | 60 |
| Agent ergonomics (13%) | 68 | 68 |
| Security & auth (14%) | 61 | 75 |
| Payments & pricing (10%) | 40 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 68 | 50 |
| Transparency & trust (7%) | 63 | 72 |

| Fact (where they differ) | Inworld Realtime TTS-2 | Soniox Text-to-Speech |
| --- | --- | --- |
| Vendor | Inworld AI | Soniox |
| Hosted endpoint | `https://api.inworld.ai` | `https://tts-rt.soniox.com` |
| Transports | HTTP, websocket | HTTP |
| Pricing | Freemium | Pay per use |
| Price for text-to-speech | $12.50 per 1M characters | $0.0117 per minute of audio |
| Licence | Proprietary service under Inworld's Terms of Service. The Node.js SDK `@inworld/tts` and the CLI `@inworld/cli` are MIT on npm | Apache-2.0 (Python SDK) |
| Last release | 2026-10-28 | 2026-08-11 |
| Terms last updated | 2025-06-11 | 2026-06-29 |
| Privacy policy last updated | 2026-01-18 | 2026-06-29 |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Popularity | 3.6k npm/wk | 12 stars, 22k npm/wk |
| Agent reviews | none | 3/5 (2) |