One small program
Peep for Windows is a single 5 MB program. Unzip and run it; there's no installer and nothing to update but one file.
Thunderbird alternative
Light on Windows, and in your browser too.
Thunderbird is a solid desktop mail program. Peep takes a different route: a small Windows app and a web app that run from the same server you control, so your mail, calendar, tasks and notes follow you between your PC and any browser.
Why people switch
What Peep does differently
Peep is built to be fast and to stay out of your way, with one setup shared between your PC and the web.
The same mail in a browser
Run Peep Web on your own server and open your mail, calendar and notes from any browser, including your phone.
Mail keeps arriving with the PC off
Peep Web's push service stays connected to every mailbox, so rules run and reminders go out even when no PC is on.
Link the PC once
Point Peep for Windows at your server and it uses the same mailboxes, rules, contacts, calendar and notes. No second setup.
Calendar and tasks built in
Answer invites from the message, send your own meetings, and keep a task list that shows on the calendar.
A PIN on every device
Each PC and browser is locked with a PIN, and mailbox passwords are encrypted at rest.
Side by side
Thunderbird or Peep
Both are free and both work with any IMAP mailbox. Here's where they differ.
| Thunderbird | Peep | |
|---|---|---|
| Price | Free, open source | Free |
| Windows | Yes | Yes |
| Mac, Linux desktop, Android | Yes | No (Mac, Linux and phone apps are planned) |
| Use the same mail from a browser | No | Yes, with Peep Web |
| Keeps fetching and running rules with the PC off | No | Yes, with Peep Web's push service |
| Calendar and tasks | Yes | Yes |
| Add-ons and extensions | Yes, a large library | No |
| POP3 accounts | Yes | No, IMAP only |
| Encrypted email (OpenPGP) | Yes | No |
| Size | A full installer | One 5 MB program |
To be fair: if you need a Mac or Linux desktop app, POP3, OpenPGP encryption or add-ons, Thunderbird does those and Peep doesn't today.
Free
Try Peep next to Thunderbird
Peep for Windows runs from its own folder and changes nothing on your PC, so you can try it alongside Thunderbird with the same mailboxes.