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Why not just keep the latest?
Keeping only the latest version sounds simple. But old versions still get quoted, and questions about the past keep coming.
Factagora answers from the version that held on that date. Ask again any time and get the same answer.
Sources
How it works
Every claim becomes a fact with its date and its source.
Use cases
Case Study
Korea's top 5 law firm transformed their legal research with Factagora. Over 350,000 documents restructured into dated, verifiable facts.
Read Case StudyShin & Kim LLC
Top 5 Law Firm in Korea
Factagora demonstrated lawyer-like logic, saving our lawyers time while enhancing trust in our AI services.
Junkyu Ahn
Lawyer at Shin & Kim LLC
Inside the app
Pick a date and get the answer that held then, with what replaced it since.
Open source
If your own folder and your own model key are enough, FactBlock is free. When you need team sharing, server-stamped time and an audit trail, use Factagora.
terminal
pip install --pre factblock
factblock sample --policies irs/
factblock import irs/mileage.csv --backfill -o brain/
factblock import irs/mileage-2026-07.csv --backfill -o brain/
# asked July 10: 72.5 (76 not announced yet)
factblock recall brain/ "mileage rate" --as-of 2026-07-10 --limit 1
# asked July 20: 76, and 72.5 marked replaced
factblock recall brain/ "mileage rate" --as-of 2026-07-20 --limit 2
Private by design
FAQ
PoC
Send us the documents that keep changing. We'll set up a collection and show you the answers, version by version.