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Productivity · head to head

Fastmail vs SignWell

Fastmail logo

Fastmail

Productivity

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

From
$3/month
Rated
-
Full reviewWebsite
SignWell logo

SignWell

Productivity

Electronic signature service priced per sender, with unlimited documents on paid plans

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only SignWell 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.; SignWell the free plan stops at three documents a month, which makes it a trial rather than a tier, so any genuine use converts to a paid seat within weeks.
  • They diverge on capability: Fastmail covers Custom domain hosting, SignWell covers Per-sender pricing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fastmail and SignWell actually diverge.

Attributes where Fastmail and SignWell differ
AttributeFastmailSignWell
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 SignWell

  • Per-sender pricing
  • Free signers
  • Free plan
  • Templates
  • Audit trail
  • Automatic reminders
  • In-person signing
  • Bulk send and template links

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

SignWell

  • A small business sending a steady flow of contracts from one or two people, where per-envelope pricing elsewhere adds up faster than a seat would.not Fastmail
  • Replacing print, sign and scan for client agreements, offers of employment and consent forms.not Fastmail
  • Embedding signing into your own product through the API without committing to enterprise pricing first.not Fastmail
  • Repeated onboarding paperwork sent from a template with automatic chasing rather than manual reminders.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.

SignWell

  • The free plan stops at three documents a month, which makes it a trial rather than a tier, so any genuine use converts to a paid seat within weeks.
  • Pricing is per sender, so an organisation where many people occasionally need to send something either buys seats for staff who send a handful of documents a year or funnels everything through one person and creates a bottleneck.
  • Templates are rationed by tier, at one on free and five per sender on the entry plan, and templates are what makes the tool worth using at all, so the practical entry point is a tier above the headline price.
  • It is a smaller vendor in a category where signed agreements must be retrievable years later, so the safe practice is downloading every signed document and its audit certificate into your own storage rather than relying on the account still existing.
  • It provides standard electronic signatures rather than acting as a qualified trust service provider, so any transaction requiring a qualified electronic signature under European rules needs a different supplier alongside it.

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

SignWell

Free
  • FreeFree
    • 1 sender
    • 1 template
    • 3 documents per month
  • Light$10/month
    • Annual pricing: $10/month (monthly: $12/month)
    • 1 sender
    • 5 templates per sender
  • Business$30/month
    • Annual pricing: $30/month (monthly: $36/month)
    • 3 senders
    • Unlimited templates and documents
  • Enterprise$null/custom
    • Custom pricing for teams of 50+
    • High volume support
    • Advanced compliance needs

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 SignWell if

  • You need per-sender pricing.
  • You want to start without paying.
  • You also want free signers.
SignWell review

Questions people ask

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

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.

SignWell: Do signers need an account or a licence?

No. Recipients open a link, sign and are done, with no account and no cost. You pay only for the people who send documents.

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.

SignWell: What does the free plan actually allow?

Three documents a month, one sender and one template, along with a small monthly allowance of API documents. It does not include custom branding or bulk send.

Fastmail: Can I use my own domain?

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

SignWell: Is an electronic signature legally binding?

Electronic signatures are recognised for most commercial agreements under the relevant American and European frameworks, and SignWell records an audit trail. Certain instruments are excluded by statute, and anything requiring a qualified signature needs a qualified provider.

SignWell: How hard is it to leave?

The signed documents are ordinary PDFs you can download with their certificates, so the records move easily. Your templates and the workflows built around them do not.

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