Establishing what is true is free, forever. Connecting sources, marking what is current, confirming it, seeing what disagrees, and letting your AI read the trusted answer never cost anything.
Pro adds why documents disagree rather than only that they do, full provenance and version history, agent proposals you decide on, deep review across a collection, and your own AI provider key.
If you stop paying, your account returns to Free. Nothing is deleted, nothing is locked, and the full export stays available including history older than Free displays.