Zhihu Tech Column

May 9, 2026 · Big Data

How Zhihu Built a Unified OneID System to Consolidate Fragmented User Identities

Zhihu created a unified OneID framework that merges scattered account, device, and behavior data into a global unique identifier, using strong and weak IDs, graph‑based connectivity, device governance, and a device half‑life model to improve recommendation, push, and advertising effectiveness.