Where Does Superhuman Store Mail Data?
Superhuman caches Gmail and Outlook mail locally per OS for speed, with the mailbox itself living in the cloud.
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Superhuman is a fast client over cloud mailboxes, not a mail store. Gmail and Outlook hold every message; the desktop app keeps an encrypted cache for instant search and offline triage. Deleting the cache only costs speed until it rebuilds.
Keyboard shortcuts, snippets, and read statuses sync through your Superhuman account. Local troubleshooting means clearing the cache from settings rather than hunting files. Mail actions always resolve server side, so no local backup ever preserves mail itself.
Where Superhuman stores this, by platform
App-managed cache in local app data
Exact paths may vary by version and installer. Prefer in app cache clear over file deletion. Mail lives in Gmail or Outlook cloud.
App-managed cache in Library
Same cloud mailbox model as Windows. Shortcuts and snippets follow the account across Macs on sign in.
Frequently asked questions
Can I back up Superhuman mail locally?
No need and no mechanism. Gmail or Outlook holds the archive; use their export tools for real backups. Superhuman cache copies are disposable speed layers.
Why is Superhuman using so much disk space?
Large mailboxes with attachments expand the local cache. Clear it from settings and let it rebuild lean, or reduce offline retention windows.
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