Why we built it
Comparing two lists is a tiny task that shows up everywhere: checking new subscribers, validating inventory, reconciling research sources, reviewing URL migrations, or finding what changed in an export. It should not require a complex spreadsheet formula or uploading sensitive data to an unknown server.
Our product principles
- One obvious workflow, with advanced controls kept close at hand.
- Private by architecture: the comparison runs in your browser.
- Useful outputs that copy or download cleanly.
- No artificial limits, logins, or distractions.
What comes next
This preview focuses on the core comparison experience. Saved presets, richer CSV handling, and additional text utilities can be added after real-world testing confirms which workflows matter most.