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Productivity · head to head

Fastmail vs Logseq

Fastmail logo

Fastmail

Productivity

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

From
$3/month
Rated
-
Full reviewWebsite
Logseq logo

Logseq

Content Creation

Free open-source note-taking with linked thoughts

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Logseq 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.; Logseq aGPL-3.0 licensing requires derivative works to be open-source
  • They diverge on capability: Fastmail covers Custom domain hosting, Logseq covers Markdown-based notes.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fastmail and Logseq actually diverge.

Attributes where Fastmail and Logseq differ
AttributeFastmailLogseq
Starting price$3/monthFree
Pricing modelPer user per monthopen-source
Free tierNoYes
PlatformsWeb, iOS, Android, macOS, WindowsmacOS, Linux, Windows, iOS, Android, Web
CategoryProductivityContent Creation
FoundedUnknown2020

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

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 Logseq

  • Markdown-based notes
  • Bidirectional linking
  • Graph visualization
  • Backlinks
  • Tags
  • Daily notes
  • Journaling
  • Search and filtering

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 Logseq
  • A small business wanting hosted mail on its own domain without running mail server infrastructurenot Logseq
  • A person leaving Gmail specifically to stop an ad-funded provider processing their mailnot Logseq
  • A household migrating several accounts to one paid provider with shared billingnot Logseq

Logseq

  • Privacy-first knowledge management with local data storagenot Fastmail
  • Open-source alternative to proprietary note-taking platformsnot Fastmail
  • Markdown and Org-mode file support with PDF annotationnot Fastmail
  • Extensible through plugin ecosystem for custom workflowsnot 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.

Logseq

  • AGPL-3.0 licensing requires derivative works to be open-source
  • Mobile apps (iOS and Android) still in alpha/beta development stage
  • Self-hosted with local-first architecture, no built-in cloud sync option
  • No native synchronisation between desktop and mobile versions without setup

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

Logseq

Free

No published plan breakdown. See the Logseq review.

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 Logseq if

  • You need markdown-based notes.
  • You want to start without paying.
  • You work on macOS, Linux, Windows, iOS, Android, Web.
  • You also want bidirectional linking.
Logseq review

Questions people ask

Is Fastmail or Logseq better?
Neither clearly leads. Fastmail starts at $3/month and Logseq at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fastmail or Logseq?
Logseq has a free tier; the other does not. Paid plans start at $3/month for Fastmail and Free for Logseq.
Does Fastmail or Logseq run on more platforms?
Fastmail runs on Web, iOS, Android, macOS, Windows. Logseq runs on macOS, Linux, Windows, iOS, Android, Web.
Can I use Logseq for free?
Yes. Logseq 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 Logseq is typically brought in for.
What can Fastmail do that Logseq cannot?
Fastmail covers Custom domain hosting, Masked email, Unlimited aliases, Integrated calendar and contacts. Logseq covers Markdown-based notes, Bidirectional linking, Graph visualization, Backlinks.

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.

Logseq: How much does Logseq cost?

Logseq is a free, open-source privacy-first knowledge base with no paid tiers or hidden costs. The software is available to download and use at no charge.

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.

Fastmail: Can I use my own domain?

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

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