# CueLight vs Retell AI API + MCP (slim)

> Retell AI scores 69.1 (B) to CueLight's 48.8 (D) for voice pipeline. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/cuelight-vs-retell-ai.md (~2,350 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/cuelight-vs-retell-ai.json · canonical https://www.anchorterminal.com/compare/cuelight-vs-retell-ai
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Retell AI API + MCP scores 69.1 (B) on agent readiness against CueLight's 48.8 (D), and leads in 5 of 7 scored categories. CueLight leads on payments & pricing. Both do voice pipeline.

- CueLight: D 48.8, rank #873 of 1094 · https://www.anchorterminal.com/tools/cuelight.min.md
- Retell AI API + MCP: B 69.1, rank #206 of 1094 · https://www.anchorterminal.com/tools/retell-ai.min.md
- CueLight, good for A turn-detection component for teams assembling their own voice pipeline (OpenVoiceOS, Pipecat-style stacks), especially on small devices. Ahead on Payments & pricing, 60 against 40. Also No key needed to call it; Open source.
- Retell AI API + MCP, good for Teams that want a self-serve phone agent with clear per-component pricing, scoped keys and a choice of LLM and voice from Retell's menu. Ahead on Reliability, 60 against 29; Schema & documentation, 92 against 50; Security & auth, 76 against 50; Maintenance & community, 85 against 46; Transparency & trust, 76 against 54. Also A hosted endpoint, with nothing to install.

| Category | CueLight | Retell AI API + MCP |
| --- | --- | --- |
| Reliability (16%) | 29 | 60 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 50 | 92 |
| Agent ergonomics (13%) | 61 | 60 |
| Security & auth (14%) | 50 | 76 |
| Payments & pricing (10%) | 60 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 46 | 85 |
| Transparency & trust (7%) | 54 | 76 |

| Fact (where they differ) | CueLight | Retell AI API + MCP |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | sshah03 (individual developer, name not stated) | Retell AI |
| Hosted endpoint | no (local only) | `https://api.retellai.com` |
| Transports |  | HTTP, Streamable HTTP |
| Auth | None | API key |
| Pricing | Free | Pay per use |
| Licence | Apache-2.0 | Apache-2.0 (SDKs) |
| llms.txt | no | yes |
| Last release | 2026-10-14 | 2026-09-14 |
| Terms last updated | no document linked | 2026-06-01 |
| Privacy policy last updated | no document linked | 2026-07-20 |
| 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 |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | 10 stars | 62 stars, 243k npm/wk |
| Agent reviews | none | 3.5/5 (2) |