Resemble AI
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About KeepKnown
What Is KeepKnown?
KeepKnown is a privacy-first email filtering tool that only allows emails from your contact list into your inbox. Everyone else is silently screened into a separate Screening Room. It works with Gmail, Outlook, and Microsoft 365, and deletes nothing — so you never lose a legitimate message.
Who Is It For?
Designed for busy professionals, executives, and small teams drowning in cold emails, spam, and vendor pitches. It’s not for users who need complex rule-based filtering or want to block emails from specific senders only — KeepKnown uses your contacts as the sole gatekeeper.
Real Use Cases
Executives can focus on board materials instead of sifting through cold outreach. Lawyers can separate client emails from unsolicited offers. Any professional who shares their inbox publicly can reclaim their attention without missing important contacts.
Key features
- Allow-List Filtering — Only emails from people in your contact list reach your inbox; unknown senders go to the Screening Room.
- Real-Time Contact Sync — Automatically syncs with your Google or Outlook contacts; no manual lists to maintain.
- Recoverable Screening Room — Every screened email stays accessible, so you can review or rescue messages anytime.
- Bank-Grade Security — Google Verified (CASA Tier 2), zero data selling, and no email body reading.
- Multi-Platform Support — Works with Gmail, Outlook, and Microsoft 365 on web and mobile.
SaaSpartout Score
7.1
/10
Editorial score from our review methodology — not user ratings.
KeepKnown Pricing
KeepKnown pricing: from $19/mo (billed annually).
Founder – $19/month (billed annually, $228/year)
1 protected inbox, unlimited email filtering, real-time contact sync, recoverable Screening Room. Gmail, Outlook & Microsoft 365.
Executive Pro – $49/month (billed annually, $588/year)
Up to 3 protected inboxes, priority support, advanced analytics and upgrade signals. Includes all Founder features.
Team Gate – from $199/month (billed annually)
5 protected inboxes included, additional inboxes available, team management console, onboarding support, enterprise/agency options. Contact Sales.
All plans include a 7-day free trial. No card required to connect your inbox first.
Frequently asked questions
How much does KeepKnown cost?
KeepKnown starts at $19/month (billed yearly) for the Founder plan with 1 protected inbox. Executive Pro is $49/month (yearly) for up to 3 inboxes. Team Gate is from $199/month (yearly).
Is KeepKnown free?
There is a free Signal Audit that shows your unknown sender volume without any cost or card. All paid plans include a 7-day free trial after connecting your inbox.
Does KeepKnown work with Gmail and Outlook?
Yes, KeepKnown works with Gmail, Outlook, and Microsoft 365. It syncs with your existing contacts in each platform.
What are the best alternatives to KeepKnown?
Popular alternatives include SaneBox, Mailstrom, and Clean Email. KeepKnown is unique because it uses an allow-list based solely on your contacts rather than rules or AI.
Who is KeepKnown best for?
It’s ideal for executives, founders, and professionals who receive high volumes of cold emails and want to prioritize messages from known contacts only.
Does KeepKnown read my emails or sell my data?
No. KeepKnown uses bank-grade security, is Google Verified (CASA Tier 2), never reads email bodies, and never sells your data.
