DeepSeek's open-source Harness agent hits 1.54M daily users in under three months, with an official plugin marketplace planned

What's the deal? DeepSeek said on Sunday, 8 November, that Harness, its open-source agent application, had about 1.54 million daily active users on 4 November, less than three months after launch. The figure counts users of DeepSeek's official API only. DeepSeek disclosed it in a post on X, and Bloomberg reported it the same day.

The numbers: Daily users were roughly 271,000 at the end of September. Harness users consume around 92 trillion tokens a day, an early public signal of how much more compute long-running agent tasks use than chatbots. The team says about 35,000 third-party plugins have been built for the agent.

What happens next? DeepSeek plans an official plugin marketplace and a support programme for plugin authors, with no launch date announced.

Why it matters: Harness shows DeepSeek competing for the agent layer above the model, where plugins and discovery shape which runtime developers build on.

Sources: Bloomberg; DeepSeek Harness on X.