KeepKnown vs GhostRelay
Comprehensive feature analysis, ratings breakdown, platform compatibility, and community review comparison.
Detailed Feature Comparison Matrix
Compare Other Tools| Dimension |  KeepKnown |  GhostRelay |
|---|---|---|
| Primary Category | ||
| Community Rating | No ratings(0 reviews) | No ratings(0 reviews) |
| Community Upvotes | 6 votes | 11 votes |
| Supported Platforms | Web | Web |
| Tags & Focus | #SaaS#Productivity#Email | #Developer Tools#GitHub#Email#Anonymous |
| Maker / Company | Independent Developer | Independent Developer |
| Platform Verification | Community Listing | Community Listing |
About KeepKnown
KeepKnown is an advanced filter builder designed for Gmail and Outlook, acting as the ultimate upgrade your native inbox filtering should have. Built to handle complex inbox organization, KeepKnown lets users combine relationship, history, header, attachment, subject, and mailbox signals using powerful nested logic.
Designed with security and testing in mind, core filtering does not read email bodies. Users can preview rules on real mail, trace every single match via a transparent decision log, and safely activate rules in Shadow, Review Only, or Enforce modes where supported. Additionally, new filters are saved paused by default, and reusable templates help speed up common daily workflows.
Pros of KeepKnown
- Advanced filter builder for both Gmail and Outlook
- Supports nested logic combining relationship, history, header, attachment, subject, and mailbox signals
- Core filtering does not read email bodies, enhancing privacy
- Safe testing and deployment with Shadow, Review Only, or Enforce modes and a comprehensive decision log
- Reusable templates and paused-by-default filter creation for efficient workflow management
Cons of KeepKnown
- Requires proper mode configuration (Shadow, Review Only, Enforce) depending on supported platforms
- New filters save paused by default, requiring manual activation
- Specific email body parsing is intentionally excluded from core filtering
Frequently Asked Questions
Which email providers does KeepKnown support?
KeepKnown is built as an advanced filter builder specifically for Gmail and Outlook.
Does KeepKnown read the content of my emails?
No. Core filtering in KeepKnown does not read email bodies, protecting your email privacy.
How can I safely test new filters before turning them on?
You can preview rules on real mail, use a detailed decision log to trace every match, and activate rules in Shadow or Review Only modes before enforcing them.
About GhostRelay
GhostRelay is a free, self-hosted email aliasing tool designed to protect your inbox and enhance your digital privacy. Created by developer Shivansh Goel, GhostRelay allows you to generate unlimited masked email addresses leveraging Cloudflare's free tier. By assigning a unique email alias to every service you use, you can instantly shut down or kill an alias the moment it becomes compromised or starts receiving spam.
Unlike traditional email forwarding services that require a Virtual Private Server (VPS), containerization like Docker, or expensive monthly subscriptions, GhostRelay eliminates ongoing server costs entirely. It can be self-hosted in roughly 15 minutes with no server required. Released under the open-source MIT license, GhostRelay provides modern aliasing features including per-alias stats, expiring aliases, and the ability to reply anonymously from any alias.
Pros of GhostRelay
- Completely free with zero monthly bills or server costs
- No server, VPS, or Docker required to set up
- Generates unlimited masked email addresses on Cloudflare's free tier
- Allows you to reply anonymously from any alias and set up expiring aliases
Cons of GhostRelay
- Requires initial setup and self-hosting knowledge (approximately 15 minutes to deploy)
- Relies on Cloudflare infrastructure
- Limited to developers or users comfortable with self-hosted open-source tools
Frequently Asked Questions
What is GhostRelay?
GhostRelay is a free, open-source (MIT) self-hosted email aliasing tool that generates unlimited masked email addresses using Cloudflare's free tier, allowing you to protect your primary inbox and kill compromised aliases instantly.
Do I need a paid server or Docker to run GhostRelay?
No. GhostRelay requires no server, no VPS, and no Docker. It runs on Cloudflare's free tier and can be deployed quickly without any monthly subscription fees.
Can I reply to emails using my masked aliases?
Yes, GhostRelay supports replying anonymously from any of your masked aliases.