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KeepKnown
The filter builder your Gmail and Outlook should have
KeepKnown is an advanced filter builder for Gmail and Outlook. Combine relationship, history, header, attachment, subject, and mailbox signals with nested logic; preview rules on real mail; activate in Shadow, Review Only, or Enforce where supported; and trace every match in a decision log. New filters save paused, reusable templates speed up common workflows, and core filtering does not read email bodies.
Hey Product Hunt 👋 I’m Aymane, maker of KeepKnown.
I built KeepKnown because my inbox kept making me re-decide the same things: who deserves attention, what can wait, and why something moved. Native Gmail and Outlook filters are great for simple criteria; I wanted a real test bench for the rules around a high-noise inbox.
KeepKnown gives you:
• Up to 20 conditions and three nested logic levels
• Relationship signals like contacts, replied-before, VIP domains, and sender groups
• Real-mail previews; new filters save paused
• Shadow, Review Only, and Enforce where the provider supports them
• Decision history showing which filter matched and why
• Gmail and Outlook support without changing email clients
Core filtering does not read email bodies. Subject-based rules only use encrypted subject metadata when explicitly configured.
I’d love feedback from Gmail and Outlook power users: what’s the rule you’ve wanted to build but your inbox couldn’t express—or the automation you were afraid to turn on?
About KeepKnown on Product Hunt
“The filter builder your Gmail and Outlook should have”
KeepKnown was submitted on Product Hunt and earned 7 upvotes and 2 comments, placing #85 on the daily leaderboard. KeepKnown is an advanced filter builder for Gmail and Outlook. Combine relationship, history, header, attachment, subject, and mailbox signals with nested logic; preview rules on real mail; activate in Shadow, Review Only, or Enforce where supported; and trace every match in a decision log. New filters save paused, reusable templates speed up common workflows, and core filtering does not read email bodies.
On the analytics side, KeepKnown competes within Email, Productivity and SaaS — topics that collectively have 738.5k followers on Product Hunt. The dashboard above tracks how KeepKnown performed against the three products that launched closest to it on the same day.
Who hunted KeepKnown?
KeepKnown was hunted by Aymane Sennoussi. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of KeepKnown including community comment highlights and product details, visit the product overview.
Aymane Sennoussi