MemKeeper

MemKeeper is a browser-based tool designed to help individuals understand what information leading AI platforms—specifically ChatGPT, Claude, and Gemini—retain about them. By importing data exports from these services, users can view, compare, and analyze the memories each AI has accumulated, highlighting both shared and unique details across platforms. The tool addresses the challenge that, while AI systems remember user interactions, they typically do not display this information transparently to users.

All data processing in MemKeeper occurs locally within the user's browser. The tool does not upload any information to external servers, ensuring that user data remains private and secure. Users can paste summaries or full data exports directly into the interface, and MemKeeper instantly updates a side-by-side comparison, showing differences and overlaps in what each AI remembers. The tool supports ZIP and JSON exports from the respective platforms, and guides are provided for obtaining these exports under data protection laws.

MemKeeper requires no installation or account creation. The user's data vault is stored in the browser's IndexedDB, and the comparison engine operates deterministically using normalized text and a difflib ratio, without invoking embeddings or large language models. The engine is a TypeScript port of AgentKeeper and is open source under the MIT license. MemKeeper is built in the EU and is a product of ThinkLance AI.

This tool is particularly useful for individuals concerned with privacy and transparency in their AI interactions, giving them direct insight into the personal information stored by different AI platforms. Its open-source nature and in-browser operation emphasize user control and data sovereignty.