A changed decision
Illustrative example When is the project review?
Friday.
The Tuesday note is still in the record. A later note moves the review to Friday.
MemStrata keeps your chats, documents and project history in an index on your own computer. Ask a question and see the exact passages behind the answer.
Free for 180 days after activation. Windows, Linux and Apple silicon.
Measured in the open
Author-run, development-exposed research using one automated judge model, GPT 5.5—not independent replication or a held-out customer evaluation. The source-aware headlines regrade the same answers with sources visible to the judge. Their reference-aware scores are 92.6% (463/500) on LongMemEval-S and 78.25% (1205/1540) on LoCoMo. These are not new reader runs or product guarantees. Compare the grading methods.
The research reader was Qwen 3.8 27B Q4. The product does not include that model; you connect your own AI.
How it works
Prepare private memory, then add chats, notes or documents.
Setup lists the reader used for Standard and Deep.
Ask in the chat. Standard and Deep use the same index. Open Why this answer and read the passages behind the answer.
Indexes and source processing run on your device. Account, licensing, and optional connectors use MemStrata or destination services. If you choose a cloud answering model, the question and selected passages leave the device for that provider. Credentials stay in the operating-system credential vault. Customer content is not used for training unless the customer separately opts in.
See the idea
A deadline moves. A count spans many conversations. A detail was never mentioned. Step through three short examples and open the sources behind each answer.
Four products
Conversational, Coder, Structured and Governance each do one job well. Start with the one that matches your work.
Ask about imported documents and chats with inspectable evidence
Supply relevant repository context to a supported coding tool
Answer supported current, history and change questions over records
Observe connected agent actions and use supported controls
Read our published research on arXiv. Every benchmark result on this site keeps its denominator, judge and method label. Research results, measured under the stated conditions.
Install Conversational, connect a folder of notes or an exported chat, and open the evidence behind your first answer.