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Productivity · head to head

Fastmail vs WPS Office

Fastmail logo

Fastmail

Productivity

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

From
$3/month
Rated
-
Full reviewWebsite
WPS Office logo

WPS Office

Productivity

Office suite from Kingsoft with Microsoft file compatibility, including maintained Linux builds

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only WPS Office 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.; WPS Office the free tier is funded by advertising, and the adverts and upgrade prompts appear inside the editing window rather than on a website, so the cost of not paying is charged in interruptions while you work.
  • They diverge on capability: Fastmail covers Custom domain hosting, WPS Office covers One application.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fastmail and WPS Office actually diverge.

Attributes where Fastmail and WPS Office differ
AttributeFastmailWPS Office
Starting price$3/monthFree
Pricing modelPer user per monthfreemium
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 WPS Office

  • One application
  • Microsoft format handling
  • PDF tools
  • Linux builds
  • WPS AI
  • Cloud storage
  • Mobile apps
  • Templates

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

WPS Office

  • A Linux desktop where the free alternatives keep breaking the layout of colleagues' DOCX and PPTX files.not Fastmail
  • A small business that edits and converts PDFs regularly and does not want an Acrobat subscription for each person.not Fastmail
  • Students and home users who need Microsoft-compatible documents without a Microsoft 365 subscription.not Fastmail
  • Older or low-specification Windows machines where the full Microsoft suite is slow to install and slow to run.not 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.

WPS Office

  • The free tier is funded by advertising, and the adverts and upgrade prompts appear inside the editing window rather than on a website, so the cost of not paying is charged in interruptions while you work.
  • Kingsoft is a Chinese company and cloud sync stores documents on its infrastructure by default, which is a procurement blocker for government, defence and many regulated buyers no matter how well the software performs.
  • Complex Microsoft files still drift, so heavily formatted documents with tracked changes, PowerPoint animations and workbooks using recent functions or VBA macros can open with differences that only become visible when the file goes back to a Microsoft user.
  • There is no tenant administration, so an organisation has no central console for licences, policy, retention or offboarding, and every installation has to be managed on the individual machine.
  • Cloud storage stops at 1 GB free and 20 GB per user when paid, so it works as sync for documents and stops being viable for anyone handling media, scans or large PDF archives.

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

WPS Office

Free

No published plan breakdown. See the WPS Office 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 WPS Office if

  • You need one application.
  • You want to start without paying.
  • You also want microsoft format handling.
WPS Office review

Questions people ask

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

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.

WPS Office: Will it open and save Microsoft Office files properly?

It reads and writes DOCX, XLSX and PPTX natively and ordinary documents round-trip cleanly. Files with macros, tracked changes or complex animation can differ, so check anything going back to a Microsoft user.

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.

WPS Office: Is the free version genuinely free?

Yes, and it is not time-limited. It shows adverts, caps cloud storage at 1 GB, and holds back PDF editing and conversion, text recognition and electronic signature for the paid plan.

Fastmail: Can I use my own domain?

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

WPS Office: Does it run on Linux?

Yes, with maintained desktop builds, which is unusual for a commercial office suite. The Linux version can trail Windows on newer features.

WPS Office: Is it suitable for a regulated organisation?

Usually not without a review. The vendor is Chinese, cloud sync is on by default, and there is no administrative or compliance tooling of the kind a regulated buyer will be asked to evidence.

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