addy.io is an open-source email aliasing service that lets you create unlimited aliases forwarding to your real inbox. Available on web, browser extensions for all major browsers, and Android/iOS apps. Self-hostable. Based in the United Kingdom.
Official website addy.io
Our take
addy.io sits in a strong spot for alias-based inbox protection: the free tier is genuinely useful (unlimited standard aliases, no credit card), the browser extension makes on-the-spot alias creation frictionless, and GPG encryption means even forwarded mail stays private in transit. The catch is the free plan’s 10MB monthly bandwidth cap, which is tight enough to matter if you forward newsletters. Power users who hit that ceiling will find the paid tiers reasonably priced. A solid first alias service for anyone leaving Gmail or Outlook behind.
GitHub at a glance
anonaddy/anonaddy
Stars
4,695
+ 0 this week
Last commit
22d ago
healthy
License
AGPL-3.0
Latest release
v1.6.1
1mo ago
Stars, last 9d
Listed in
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addy.io license, in plain English
AGPL-3.0 Strong copyleft · network
Free to use, even commercially. Changes must be published under the same license, and running a modified version as a network service counts as distributing it.
Permits
- Commercial use
- Modification
- Distribution
- Patent use
- Private use
Requires
- Disclose source
- Network use is distribution
- Same license
- State changes
- License and copyright notice
Does not provide
- Liability cover
- Warranty
Why it matters: The network clause is the point. Anyone who runs a modified version as a hosted service has to publish those changes, so the code handling your data stays inspectable. This is why privacy-first projects reach for AGPL.
Plain-language summary of the project's license, not legal advice. Read the full text for the exact terms.