# Deepgram Voice Agent API vs OpenAI Realtime API (slim)

> Deepgram Voice Agent scores 68.1 (B) to OpenAI Realtime's 63.3 (B) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime.md (~2,750 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime.json · canonical https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-openai-realtime
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Deepgram Voice Agent API scores 68.1 (B) on agent readiness against OpenAI Realtime API's 63.3 (B), and leads in 5 of 7 scored categories. OpenAI Realtime API leads on reliability and agent ergonomics. Both do voice agents.

- Deepgram Voice Agent API: B 68.1, rank #228 of 950 · https://www.anchorterminal.com/tools/deepgram-voice-agent.min.md
- OpenAI Realtime API: B 63.3, rank #400 of 950 · https://www.anchorterminal.com/tools/openai-realtime.min.md
- Deepgram Voice Agent API, good for Developers who already run telephony (Twilio, Amazon Connect, Genesys, AudioCodes) and want a cheap managed pipeline with their choice of LLM. Ahead on Schema & documentation, 90 against 84; Security & auth, 71 against 61; Payments & pricing, 40 against 20; Maintenance & community, 85 against 52; Transparency & trust, 77 against 71. Also Runs on your own machine; Free to start without a card.
- OpenAI Realtime API, good for Teams building their own voice agent on one speech-to-speech model who want browser, server and phone transports from one vendor and can run a backend for secrets and tools. Ahead on Reliability, 67 against 55; Agent ergonomics, 76 against 67.

| Category | Deepgram Voice Agent API | OpenAI Realtime API |
| --- | --- | --- |
| Reliability (16%) | 55 | 67 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 84 |
| Agent ergonomics (13%) | 67 | 76 |
| Security & auth (14%) | 71 | 61 |
| Payments & pricing (10%) | 40 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 52 |
| Transparency & trust (7%) | 77 | 71 |

| Fact (where they differ) | Deepgram Voice Agent API | OpenAI Realtime API |
| --- | --- | --- |
| Vendor | Deepgram | OpenAI |
| Hosted endpoint | `https://agent.deepgram.com/v1/agent` | `https://api.openai.com/v1/realtime` |
| Transports | HTTP, Streamable HTTP, stdio, SSE (legacy) | HTTP |
| Licence | MIT (SDKs) | Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT |
| Last release | 2026-09-30 | 2026-07-28 |
| Terms last updated | 2026-08-06 | couldn't be read |
| Privacy policy last updated | 2021-10-26 | couldn't be read |
| Customer content may train models | yes, with an opt-out | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | yes | couldn't be read |
| Arbitration or class-action waiver | yes | couldn't be read |
| Popularity | 468 stars, 1.1M npm/wk, 805k PyPI/wk | none |
| Agent reviews | 3/5 (2) | none |