Is Fastmail or Kami better?

Neither clearly leads. Fastmail starts at $3/month and Kami at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Fastmail or Kami?

Kami has a free tier; the other does not. Paid plans start at $3/month for Fastmail and Free for Kami.

Does Fastmail or Kami run on more platforms?

Fastmail runs on Web, iOS, Android, macOS, Windows. Kami runs on Web, Chrome Extension, IOS, Android.

Can I use Kami for free?

Yes. Kami 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 Kami is typically brought in for.

What can Fastmail do that Kami cannot?

Fastmail covers Custom domain hosting, Masked email, Unlimited aliases, Integrated calendar and contacts. Kami covers PDF annotation, Drawing tools, Text tools, Voice comments.

Productivity · head to head

Fastmail vs Kami

Fastmail

Productivity

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

From: $3/month
Rated: -

Full review Website

Kami

Productivity

The ultimate document annotation and collaboration tool

From: Free
Rated: -

Full review Website

The short version

Only Kami 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.; Kami the free Basic plan exposes only about 10 of the 40 or more tools
They diverge on capability: Fastmail covers Custom domain hosting, Kami covers PDF annotation.
Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Fastmail and Kami actually diverge.

Attributes where Fastmail and Kami differ
Attribute	Fastmail	Kami
Starting price	$3/month	Free
Pricing model	Per user per month	freemium
Free tier	No	Yes
Platforms	Web, iOS, Android, macOS, Windows	Web, Chrome Extension, IOS, Android
Founded	Unknown	2013

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 Kami

PDF annotation
Drawing tools
Text tools
Voice comments
Text-to-speech
OCR
Split/merge PDFs
Video embedding

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

Kami

Free document collaboration for individualsnot Fastmail
Professional document management with advanced toolsnot Fastmail
Dedicated account management for workplace teamsnot Fastmail
K-12 and higher education document 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.

Kami

The free Basic plan exposes only about 10 of the 40 or more tools
Google Classroom, Schoology, Canvas and Microsoft Teams integrations require the Teacher plan at $149 per year
School and district licensing including domain wide deployment is custom priced and requires a quote
Non education users pay separate Workplace plans at $85 or $220 per year rather than the education rate
A dedicated account manager is only available on the School or District plan

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

Kami

Free

Basic (Free)Free
- 10+ essential tools
- Google Drive and OneDrive integration
- Unlimited collaborators
Pro$12/month
- All 40+ tools and features
- Unlimited pages and document types
- Priority support
Work$25/month
- Everything in Pro
- Free onboarding and training
- Dedicated Account Manager
Teacher Plan$149/year
- All 40+ tools and features
- Full LMS integrations (Classroom, Schoology, Canvas, Teams)
- Free onboarding and training

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 Kami if

You need pdf annotation.
You want to start without paying.
You work on Web, Chrome Extension, IOS, Android.
You also want drawing tools.

Kami review

Questions people ask

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

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.

Kami: Does Kami offer a free plan and what does it include?

Yes, Kami's free Basic plan includes 10+ essential tools, unlimited collaborators, Google Drive/OneDrive integration, and 1,000+ templates. Full feature access requires Pro or higher tiers.

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.

Kami: What is the cheapest paid plan for Kami and what does it cost?

Pro plan is $12/month ($85/year when billed annually) and includes all 40+ tools, unlimited pages, and priority support for workplace users.

Source

Fastmail: Can I use my own domain?

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

Kami: Are there Kami plans designed specifically for educators?

Yes, the Teacher plan costs $149/year and includes all 40+ tools, full LMS integrations (Google Classroom, Schoology, Canvas, Teams), free onboarding, and priority support with a 30-day free trial.

Source

Kami: How much do Kami School or District plans cost?

School and District plans do not publish pricing and require contacting Kami for custom quotes. These plans include domain-wide deployment, dedicated account managers, and full LMS integrations.

Source

Fastmail vs Kami

Fastmail

Kami

The short version

Where they differ

What each one covers

Only in Fastmail

Only in Kami

What people use each for

Fastmail

Kami

Where each one falls short

Fastmail

Kami

Pricing, plan by plan

Fastmail

Kami

Which should you pick?

Choose Fastmail if

Choose Kami if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Fastmail

More on Kami

Keep looking

Other head to heads