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MailSprout

Last updated: June 2, 2026

MailSprout vs. Fastmail: which is right for your business?

MailSprout is custom-domain business email that lets you create unlimited email accounts across all of your domains for one flat monthly price, with no per-user charges.

Fastmail is a well-regarded independent email host with a strong privacy reputation, built-in calendar and contacts, and polished mobile apps. It charges per user per month. This page lays out when each option makes sense.

Get started ($15/mo)See all plans

Who should pick what

Pick Fastmail if:

  • You're a solo user or two-person team who wants a polished all-in-one (calendar, contacts, great mobile app) in one place.
  • You value privacy and Fastmail's track record on that front.
  • You only need 1-3 user seats and price isn't the main driver.

Pick MailSprout if:

  • Your team is bigger than 2-3 people. Per-seat pricing adds up fast past that point.
  • You own multiple domains and want all of them covered at one flat price.
  • You already use Google Calendar or another calendar app and don't need a second one bundled in.
  • You want unlimited accounts for every employee, project, or brand without counting seats.

What it costs

Fastmail's Standard plan is commonly used for business. Adjust the seat count below to see how per-user pricing compares to MailSprout's flat rate. Pricing shown is approximate, billed annually. Verify current pricing at fastmail.com/pricing (opens in a new tab).

Fastmail

$40.00/mo

$480.00/yr

8 users × $5/mo

Fastmail offers multiple plans at different per-user rates. This uses the Standard plan as a representative estimate. Verify your exact pricing at fastmail.com/pricing.

MailSprout Starter

$15/mo flat

$180/yr

Unlimited accounts on every domain you own.

At that size, MailSprout costs $25.00 less per month. That's $300.00 back per year.

Feature by feature

FeatureFastmailMailSprout
Custom-domain emailYesYes
Per-user pricingyes (per user / month)no (flat rate)
Multiple custom domainsyes (on all plans)yes (flat rate)
Storage2-50 GB per user depending on plan10 GB Starter, 30 GB Growth, 100 GB Scale
Calendar (built-in)Yesno (works with any calendar app)
Contactsyes (CardDAV)not built in
Mobile appsyes (native Fastmail iOS/Android apps)works in Apple Mail, Gmail, Outlook
Mobile setupFastmail app or manualOne-tap QR (Apple Mail), Outlook works out of the box
Privacy focusAustralian company, ad-freead-free, US-based
Webmailyes (custom Fastmail webmail)yes (Roundcube)
Setup time~10 min per domain~10 min per domain, 30 sec per account
Supportemail supportemail support (replies within a business day)
SOC 2 / enterprise complianceNoNo

The honest note: Fastmail's calendar, contacts, and mobile apps are genuinely good. If you want all of those in one place and have a small team, it's worth the per-user cost. MailSprout makes the most sense when team size or domain count makes per-seat pricing expensive.

Migrating from Fastmail

Fastmail supports standard protocols, so your existing email copies across the same way as any other provider. We have a step-by-step guide that walks you through the process. Your domains stay at their current registrars; you only update a few DNS settings to redirect email delivery to MailSprout. Read the Fastmail migration guide. Or email support@mailsprout.io and we'll help you plan the cutover.

Common questions

When is Fastmail the right call over MailSprout?+
Fastmail is a strong choice if you're a solo user or a two-person team who wants a polished all-in-one: calendar, contacts, and great mobile apps under one roof. Their privacy track record is excellent, the product is mature, and at one or two seats the per-user cost is manageable. MailSprout makes more sense once you have three or more people who need email, or when you own multiple domains and want them all covered at one flat price.
Does MailSprout have a built-in calendar like Fastmail does?+
No. MailSprout is email only. If you already use Google Calendar, Apple Calendar, or any other calendar app, those keep working exactly as they do today. You're not giving anything up on the calendar side by switching email hosts. If a built-in calendar that lives alongside your email is important to you, Fastmail's integrated approach is worth considering.
Can I keep my Fastmail contacts if I move to MailSprout?+
Yes. Fastmail supports CardDAV for contacts and CalDAV for calendars, both standard formats. You can export your contacts from Fastmail and import them into Apple Contacts, Google Contacts, or any other contacts app before making the switch. MailSprout doesn't include a contacts product, but your contacts aren't going anywhere.
I own 5 domains. How does Fastmail pricing compare?+
Fastmail's Standard plan supports multiple custom domains on a single account, which is good. But the per-user rate still applies: if you have 5 people across those domains, you're paying five seats per month. MailSprout's flat rate covers all five domains and every person on them for one monthly price, regardless of how many accounts you create.
How long does migrating from Fastmail to MailSprout take?+
For one user with a year or two of mail, plan on one to two hours of background sync. We have a step-by-step guide that walks you through using imapsync's free web app to copy your existing email across. Your domains stay at their current registrars; you only update a few DNS settings to redirect email delivery to MailSprout.

One subscription. Every employee, every domain.

Email hosting for small businesses and people running a stack of domains. All your projects and brands in one dashboard. Unlimited accounts, one flat fee, cancel any time.

Get started ($15/mo)See all plans

Fastmail pricing verified June 2026. Verify current pricing at fastmail.com/pricing (opens in a new tab).