Fyxer alternatives · Email
Open-source alternatives to Fyxer
Fyxer is not described as open source on its own site. 16 of the 73 other email apps in this directory are open source, according to their own sites.
Fyxer has a free plan. Paid plans start at $37 per person / month, billed annually ($49 billed monthly). 13 of them are free or have a free plan.
16 tools · Listings checked up to Nov 12, 2026 · Where the facts come from
The 12 closest to Fyxer
- Free trial · from $18/mo
Inbox Zero
Open source AI email assistant for Gmail and Outlook
- Inbox Zero starts at $18 per user / month, billed annually ($20 billed monthly). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Fyxer has a free plan. Inbox Zero does not, though it has a free trial.
- Only Inbox Zero lists macOS, Windows, iOS and Android apps.
- Only Inbox Zero lists a browser extension.
- Free plan · from $20/mo
Zero Mail
Open-source AI email client that connects your existing inboxes
- Zero Mail starts at $20 per month (billing basis not shown). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Zero Mail is open source and self-hostable, according to its own site.
- Zero Mail also covers email client.
- Fyxer also covers meeting notes, transcription, chat assistant and booking links.
- Free plan
Wino Mail
Free, open source mail and calendar app for Windows
- Only Wino Mail lists a Windows app.
- Only Fyxer lists a web app.
- Wino Mail is open source, according to its own site.
- Wino Mail also covers templates, tasks, calendar and email client.
- Free
Claws Mail
Lightweight GTK email and news client, free under the GPL
- Claws Mail is free. Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only Claws Mail lists Linux and Windows apps.
- Only Fyxer lists a web app.
- Claws Mail is open source, according to its own site.
- Free plan · from $3.99/mo
Proton Mail
End-to-end encrypted email service based in Switzerland
- Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
- Proton Mail is open source and end-to-end encrypted, according to its own site.
- Proton Mail also covers calendar and email client.
- Free
Thunderbird
Free, open-source email app for Windows, macOS, Linux and Android
- Thunderbird is free. Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only Thunderbird lists Windows, macOS, Linux and Android apps.
- Only Fyxer lists a web app.
- Thunderbird is open source, according to its own site.
- Free plan · from €3/mo
Tuta Mail
End-to-end encrypted email and calendar from Germany
- Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only Tuta Mail lists Windows, macOS, Linux, iOS and Android apps.
- Tuta Mail is open source and end-to-end encrypted, according to its own site.
- Tuta Mail also covers calendar and email client.
- Free plan · from $8/mo
Mailspring
Open-source desktop email client for Mac, Windows and Linux
- Mailspring starts at $8 per month, or $85 per year (Mailspring Pro). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only Mailspring lists macOS, Windows and Linux apps.
- Only Fyxer lists a web app.
- Mailspring is open source, according to its own site.
- From €1/mo
Posteo
Ad-free, green-powered email from Berlin for €1 a month
- Posteo starts at €1 per month, prepaid (minimum top-up €12). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Fyxer has a free plan. Posteo does not.
- Posteo is open source and end-to-end encrypted, according to its own site.
- Posteo also covers notes, calendar and email client.
- Free plan · from $7.49 one-time
FairEmail
Open source, privacy-oriented email client for Android
- FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only FairEmail lists an Android app.
- Only Fyxer lists a web app.
- FairEmail is open source and end-to-end encrypted, according to its own site.
- Free plan · from $36/yr
SimpleLogin
Open-source email aliases that forward to your own inbox
- SimpleLogin starts at $36 per year ($4 billed monthly). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only SimpleLogin lists iOS and Android apps.
- Only SimpleLogin lists a browser extension.
- SimpleLogin is open source and self-hostable, according to its own site.
- Free plan · from $1/mo
addy.io
Email alias forwarding that hides your real address from sites
- addy.io starts at $1 per month, billed yearly (Lite). Fyxer starts at $37 per person / month, billed annually ($49 billed monthly).
- Only addy.io lists iOS and Android apps.
- Only addy.io lists a browser extension.
- addy.io is open source and self-hostable, according to its own site.
Common questions
Is there an open-source alternative to Fyxer?
Yes. Inbox Zero, Zero Mail, Wino Mail, Claws Mail, Proton Mail, Thunderbird, Tuta Mail, Mailspring and 8 more are open source, according to their own sites.
Is Fyxer open source?
Fyxer is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.
Which of these email apps are free?
Zero Mail, Wino Mail, Claws Mail, Proton Mail, Thunderbird, Tuta Mail, Mailspring, FairEmail and 5 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 12, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Fyxer: the alternatives its listing names first, then the tools that share the most features with it.