EmailAttic

EmailAttic is a local desktop app that pulls decades of scattered email into a single, clean, de-duplicated archive that lives entirely on your own machine.

Point it at your accounts, old PST and MBOX backups, and exported mail, and it gathers everything into one place. It de-duplicates by message content, not by filename or byte-match, so it catches the re-exported and re-compressed copies that ordinary tools miss — in a typical family archive, roughly half of everything turns out to be duplicates. It reads from compressed and nested archives (zip, 7z, rar and more) so nothing gets left behind, and it is careful never to silently drop a message that exists in only one place.

Deliberately not cloud, not AI, and not a subscription. Your data never leaves your computer, there is no account and nothing is uploaded. It is desktop software you buy once and own, and all minor updates are free.

EmailAttic is the first of the Attic apps, which apply the same approach to photos, documents, chats and contacts.

Platforms: Windows and Linux (macOS coming). One-time purchase.