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Productivity · head to head

Fastmail vs Memberstack

Fastmail logo

Fastmail

Productivity

Paid email hosting with custom domains, calendar and contacts, run without ad-based revenue

From
$3/month
Rated
-
Full reviewWebsite
Memberstack logo

Memberstack

Productivity

Add memberships and logins to any website

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Memberstack has a free tier, so it costs nothing to try first.
  • Each has a real cost: Fastmail it does not provide end-to-end encryption by default, so users specifically wanting zero-knowledge mail should compare it against Proton Mail or Tuta rather than assume parity.; Memberstack basic and Professional tiers include transaction fees of 4% and 2% respectively
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fastmail and Memberstack actually diverge.

Attributes where Fastmail and Memberstack differ
AttributeFastmailMemberstack
Starting price$3/monthFree
Pricing modelPer user per monthsubscription
Free tierNoYes
PlatformsWeb, iOS, Android, macOS, WindowsWeb

Identical on both: user rating (Not yet rated), category (Productivity).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Fastmail

  • Custom domain hosting
  • Masked email
  • Unlimited aliases
  • Integrated calendar and contacts
  • Migration tools
  • JMAP support

Only in Memberstack

Nothing recorded that Fastmail does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Fastmail

  • Someone who wants their email address tied to a domain they own rather than a free provider they do notnot Memberstack
  • A small business wanting hosted mail on its own domain without running mail server infrastructurenot Memberstack
  • A person leaving Gmail specifically to stop an ad-funded provider processing their mailnot Memberstack
  • A household migrating several accounts to one paid provider with shared billingnot Memberstack

Memberstack

  • Launching course platforms without custom backendnot Fastmail
  • Building subscription services with Webflow and paymentnot Fastmail
  • Gating content without writing codenot Fastmail
  • Managing password resets and two-factor authenticationnot Fastmail
  • Processing Stripe billing automaticallynot Fastmail

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Fastmail

  • It does not provide end-to-end encryption by default, so users specifically wanting zero-knowledge mail should compare it against Proton Mail or Tuta rather than assume parity.
  • Moving to Fastmail is a real migration with DNS changes for a custom domain, unlike installing a client such as Spark or Bluemail over an existing account.
  • There is no free tier at all, so a user just wanting to try it commits to a paid trial rather than a permanently free option.
  • Storage limits on the entry Basic plan are modest next to the free allowance Gmail gives, and heavy attachment users will need Standard or above.
  • Being based in Australia means it falls under Australian data access law, which some privacy-focused buyers weigh differently from Swiss or German jurisdictions used by Proton Mail and Tuta.

Memberstack

  • Basic and Professional tiers include transaction fees of 4% and 2% respectively
  • Annual billing required for discounts; monthly pricing is higher
  • Webflow community builders receive Basic plan free but locked to that tier

Pricing, plan by plan

Fastmail

$3/month
  • Basic$3/month
    • 6GB storage
    • No custom domain support
    • Core mail, calendar and contacts
  • Standard$5/month
    • 60GB storage
    • Custom domain support
    • Masked email and aliases
  • Professional$9/month
    • 150GB storage
    • Multiple custom domains
    • Priority support

Memberstack

Free
  • Basic$29/month
    • Up to 1,000 members
    • 4% transaction fee
    • $25/month with annual billing
  • Professional$49/month
    • Up to 5,000 members
    • 2% transaction fee
    • $39/month with annual billing
  • Business$99/month
    • 10,000+ members
    • 0.9% transaction fee
    • $79/month with annual billing
  • Established$499/month
    • 10,000+ members
    • Zero transaction fees
    • $399/month with annual billing

Which should you pick?

Choose Fastmail if

  • You need custom domain hosting.
  • You work on Web, iOS, Android, macOS, Windows.
  • You also want masked email.
Fastmail review

Choose Memberstack if

  • You want to start without paying.
Memberstack review

Questions people ask

Is Fastmail or Memberstack better?
Neither clearly leads. Fastmail starts at $3/month and Memberstack at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fastmail or Memberstack?
Memberstack has a free tier; the other does not. Paid plans start at $3/month for Fastmail and Free for Memberstack.
Does Fastmail or Memberstack run on more platforms?
Fastmail runs on Web, iOS, Android, macOS, Windows. Memberstack runs on Web.
Can I use Memberstack for free?
Yes. Memberstack has a free tier, so you can try it without paying. Fastmail starts at $3/month.
What is Fastmail best used for?
Fastmail is most often used for someone who wants their email address tied to a domain they own rather than a free provider they do not, a small business wanting hosted mail on its own domain without running mail server infrastructure, a person leaving gmail specifically to stop an ad-funded provider processing their mail, a household migrating several accounts to one paid provider with shared billing. Of those, someone who wants their email address tied to a domain they own rather than a free provider they do not and a small business wanting hosted mail on its own domain without running mail server infrastructure are not what Memberstack is typically brought in for.
What can Fastmail do that Memberstack cannot?
Fastmail covers Custom domain hosting, Masked email, Unlimited aliases, Integrated calendar and contacts.

Answered from the vendors’ own pages

Fastmail: Is Fastmail a client like Spark, or does it host my email?

It hosts the mailbox itself; there is no separate provider underneath it the way Spark sits over Gmail.

Memberstack: What are Memberstack's transaction fees?

Memberstack's transaction fee varies by tier: Basic plan charges 4% per transaction, Professional charges 2%, Business charges 0.9%, and Established tier charges zero transaction fees.

Source
Fastmail: Does Fastmail offer end-to-end encryption?

Not by default in the way Proton Mail or Tuta do; its privacy position rests on being subscription-funded rather than ad-funded.

Memberstack: Does Memberstack offer a free trial or testing mode?

Yes, Memberstack offers an unlimited free trial in test mode requiring no credit card. Users maintain full feature access at no cost until their site launches with real members.

Source
Fastmail: Can I use my own domain?

Yes, from the Standard plan up, with full alias and masked email support.

Memberstack: What discounts does Memberstack offer?

Memberstack offers 50% discount for non-profits, special pricing for young professionals (4% fees), and $249/month with zero fees for startups under $1M raised. Webflow community builders receive the Basic plan free. 30-day money-back guarantee available with full refund.

Source
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