Sign in

Browse by category

More

Alternatives

Best Runbox alternatives in 2026

Runbox is norway-hosted email with browser PGP support and renewable power. These 5 alternatives come from the same rankings, ordered by editorial score. Connected products carry a small, disclosed lift.

5 alternatives From best secure email providers How we rank

Ranked alternatives

  1. 1

    Proton Mail

    Has a free option; is open source; also runs on iOS, Android, macOS. Zero-access encryption, a free plan and apps on every major platform, with the web client published under GPL-3.0. Custom domains and extra storage need the paid plans.

    Best for Private email with a free plan and apps

    WebiOSAndroidmacOSWindowsLinuxFree plan, paid upgradesOpen source

    92.0of 100
    Visit Alternatives
  2. 2

    Tuta

    Has a free option; is open source; also runs on iOS, Android, Windows. End-to-end encrypted mail and calendar on a free plan with post-quantum encryption, open-source clients under GPLv3 and servers in Germany. The free plan has only 1 GB of storage.

    Best for Encrypted email and calendar on a free plan

    WebiOSAndroidWindowsmacOSLinuxFree plan, paid upgradesOpen source

    90.0of 100
    Visit Alternatives
  3. 3

    Mailfence

    Has a free option; also runs on iOS, Android. OpenPGP encryption in the browser and a free plan with 1 GB, under Belgian privacy law. It needs OpenPGP key management, which adds setup that Proton and Tuta do not need.

    Best for OpenPGP email in the browser with a free plan

    WebiOSAndroidFree plan, paid upgrades

    86.5of 100
    Visit Alternatives
  4. 4

    Posteo

    An ad-free account from 1 euro a month, with anonymous registration and optional encryption of stored data. The site lists no free plan, and only the web platform is listed.

    Best for Ad-free, low-cost email with anonymous sign-up

    WebSubscription

    84.5of 100
    Visit Alternatives
  5. 5

    mailbox.org

    German data centers certified to ISO 27001, with plans from 1 euro a month after a 30-day trial. The entry plan has 2 GB of mail storage, and there is no free plan after the trial.

    Best for German-hosted email with cheap entry plans

    WebSubscription

    81.5of 100
    Visit Alternatives

Narrow the alternatives

Free alternatives to Runbox

Open-source alternatives to Runbox

Runbox alternatives for Linux

Runbox alternatives for Windows

Runbox alternatives for macOS

Runbox alternatives for Android

Runbox alternatives for iOS

About Runbox alternatives

What is the best alternative to Runbox?
On listme.name the highest-scored alternative is Proton Mail, followed by Tuta. The right choice depends on price, platform and whether you need open source.
Is there a free alternative to Runbox?
Yes. Free options include Proton Mail, Tuta, Mailfence.