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Alternatives · Email

Runbox alternatives

As of Nov 12, 2026, the highest-graded Runbox alternative is Fastmail (2.8 GPA). The best free one is Mailfence (2.6 GPA).

Runbox compared with 6 alternatives: Fastmail, Posteo, mailbox, Mailfence, StartMail and 1 more.

Runbox is a paid product with a free trial, starting at €19.95 per year (€49.95 for 3 years). 1 of the 6 alternatives is free or has a free plan. 4 more offer a free trial.

Listings checked up to Nov 12, 2026 · Where the facts come from

Black Friday: is there a Runbox sale?

At a glance

ToolPriceFree planRuns on
RunboxThis toolFree trial · from €19.95/yrTrial onlyWeb
FastmailFree trial · from $3/moTrial onlyWeb, macOS, Windows, Linux, iOS, Android
PosteoFrom €1/moNoWeb
mailboxFree trial · from €1/moTrial onlyWeb
MailfenceFree plan · from €2.50/moYesWeb, iOS, Android
StartMailFree trial · from $4.99/moTrial onlyWeb, Android
MigaduFree trial · from $19/yrTrial onlyWeb

Price against what you get

Runbox starts at about $1.86 a month and scores 2.0 out of 4 on features, ease of use and platforms. 1 of the 6 alternatives on this chart scores higher and starts lower: mailbox.

Fastmail and Mailfence score higher without starting lower. Posteo and Migadu start lower without scoring higher.

Features, ease of use and platforms, averaged

D1.0C2.0B3.0A4.0Free$0.5$1$2$5$10$20$50More for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessRunboxFastmailPosteomailboxMailfenceStartMailMigadu

What paid plans start at, a month (each step along is roughly double) →

  • The best score at each price
  • Has a free plan
  • No free plan
The full chart of email apps, and the best at every price

How each one differs from Runbox

  1. Fastmail

    Paid, ad-free email with calendar, contacts and custom domains

    • Fastmail starts at $3 per user / month, billed yearly (Basic); Individual is $5, billed yearly.
    • Fastmail also lists Windows, macOS, Linux, iOS and Android apps.

    Suits: People leaving free, ad-funded email for a paid private service

  2. Posteo

    Ad-free, green-powered email from Berlin for €1 a month

    • Posteo starts at €1 per month, prepaid (minimum top-up €12).
    • Posteo is open source and end-to-end encrypted, according to its own site.
    • Posteo also covers notes.

    Suits: People who want a low-cost, ad-free mailbox they pay for directly

  3. mailbox

    Paid, ad-free email with cloud storage and office tools from Germany

    • mailbox starts at €1 per month, annual payment only (€12 a year, Light).
    • mailbox is end-to-end encrypted, according to its own site.
    • mailbox also covers tasks, documents, video calls and file sync.

    Suits: People who want paid, ad-free email hosted in Germany

  4. Mailfence

    Private email from Belgium with built-in OpenPGP encryption

    • Mailfence starts at €2.50 per month, billed yearly (Base).
    • Mailfence has a free plan, which Runbox lacks.
    • Mailfence also lists iOS and Android apps.
    • Mailfence is end-to-end encrypted, according to its own site.
    • Mailfence also covers documents.

    Suits: People who want OpenPGP encryption without installing a plug-in

  5. StartMail

    Paid private email from the Netherlands with unlimited aliases

    • StartMail starts at $4.99 per month, billed annually ($59.88).
    • StartMail also lists an Android app.
    • StartMail also covers inbox filtering.
    • StartMail does not cover calendar, which Runbox does.

    Suits: People who want a paid, ad-free mailbox hosted in the Netherlands

  6. Migadu

    Swiss email hosting with unlimited addresses at a flat price

    • Migadu starts at $19 per year (Micro, no monthly option).

    Suits: Anyone running many addresses or domains, such as freelancers, agencies and families

Limits worth knowing in Runbox

  • Prices are listed in euros and billed per year or per 3 years; there is no monthly billing.
  • There is no free plan; the first 30 days are a trial.
  • Daily limits of 5,000 incoming and 500 outgoing messages apply on every plan.
  • The homepage quotes a dollar price that does not match the euro prices on the pricing page.
Runbox pricing and details

Common questions

What are the alternatives to Runbox?

The alternatives to Runbox in this directory are Fastmail, Posteo, mailbox, Mailfence, StartMail and Migadu. Each one has a side-by-side comparison with Runbox.

Is there a free alternative to Runbox?

Yes. Mailfence has a free plan alongside paid ones.

Which Runbox alternatives work on Windows?

The Runbox listing does not include a Windows app. Fastmail lists one.

Which Runbox alternatives work on macOS?

The Runbox listing does not include a macOS app. Fastmail lists one.

Is there an open-source alternative to Runbox?

Posteo is described as open source on its own site.

When were these prices checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 12, 2026. Vendors change prices without notice, so confirm on their site before you buy.

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