Comparison
Life after Boxcryptor
Boxcryptor proved the model: encrypt client-side, sync through the cloud you already pay for. Then it was acquired and shut down in 2023, and its users were left choosing between donation-ware and giving up.
Crystor picks the model back up with an open-source core and a published format, and extends it to the new problem: AI. Your files stay encrypted and searchable, and any AI you use gets keyhole access with a log, not the run of your storage.