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Productivity · head to head

Canary Mail vs Capacities

Canary Mail logo

Canary Mail

Productivity

Security-focused AI email client with end-to-end encryption and a lifetime purchase option

From
Free
Rated
-
Full reviewWebsite
Capacities logo

Capacities

Productivity

A studio for your mind with object-based notes

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Canary Mail pGP encryption only protects a message if the recipient also supports and uses PGP, so most everyday mail to non-technical contacts stays unencrypted regardless.; Capacities pro plan pricing not prominently displayed on website
  • They diverge on capability: Canary Mail covers AI Copilot, Capacities covers Object-based notes.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Canary Mail and Capacities actually diverge.

Attributes where Canary Mail and Capacities differ
AttributeCanary MailCapacities
Pricing modelPer user per year, or one-time purchaseUnknown
PlatformsmacOS, Windows, iOS, AndroidWeb, macOS, Windows, Linux, iOS, Android
FoundedUnknown2020

Identical on both: starting price (Free), free tier (Yes), 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 Canary Mail

  • AI Copilot
  • AI Summaries
  • Smart Search
  • PGP encryption
  • Read receipts
  • Lifetime licence

Only in Capacities

  • Object-based notes
  • Daily notes
  • Properties and relations
  • Graph view
  • AI assistant
  • Readwise
  • Web clipper
  • GDPR

What people use each for

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

Canary Mail

  • A privacy-conscious user who wants PGP encryption built into a mainstream-feeling clientnot Capacities
  • Someone who wants to avoid an open-ended subscription and prefers a lifetime purchasenot Capacities
  • A user who wants AI summaries without sending mail content through an unfamiliar third party indefinitelynot Capacities
  • Someone consolidating several IMAP accounts into one client with unified searchnot Capacities

Capacities

  • Productivitynot Canary Mail
  • Collaborationnot Canary Mail
  • Task managementnot Canary Mail
  • Organizationnot Canary Mail

Where each one falls short

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

Canary Mail

  • PGP encryption only protects a message if the recipient also supports and uses PGP, so most everyday mail to non-technical contacts stays unencrypted regardless.
  • Team and shared-inbox features are minimal compared with Spark or dedicated tools, so it does not suit a support team out of the box.
  • The lifetime purchase price and terms have shifted over past versions, and buyers should confirm current lifetime pricing directly before assuming it still applies.
  • AI features still require sending thread content to a processing service to generate drafts and summaries, so the privacy story is stronger for encryption than for the AI layer itself.
  • Windows and Android apps have historically received updates later than the macOS and iOS versions.

Capacities

  • Pro plan pricing not prominently displayed on website
  • Smaller community and ecosystem compared to Notion or Obsidian
  • Limited third-party integration marketplace

Pricing, plan by plan

Canary Mail

Free
  • FreeFree
    • Unified inbox
    • Basic search
    • PGP support
  • Growth$36/year
    • AI Copilot and summaries
    • Send later
    • Inbox cleaner
  • Pro+$100/year
    • Advanced security features
    • Priority support
    • All Growth features

Capacities

Free
  • FreeFree
    • Unlimited spaces and objects
    • Device synchronization
    • Unlimited custom object types
  • Pro$10/month
    • Everything in Free
    • Unlimited notes
    • Advanced graph views
  • Believer$149.88/year
    • Everything in Pro
    • Beta access to new features

Which should you pick?

Choose Canary Mail if

  • You need ai copilot.
  • You want to start without paying.
  • You work on macOS, Windows, iOS, Android.
  • You also want ai summaries.
Canary Mail review

Choose Capacities if

  • You need object-based notes.
  • You want to start without paying.
  • You work on Web, macOS, Windows, Linux, iOS, Android.
  • You also want daily notes.
Capacities review

Questions people ask

Is Canary Mail or Capacities better?
Neither clearly leads. Canary Mail starts at Free and Capacities at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Canary Mail or Capacities?
Canary Mail starts at Free and Capacities at Free.
Does Canary Mail or Capacities run on more platforms?
Canary Mail runs on macOS, Windows, iOS, Android. Capacities runs on Web, macOS, Windows, Linux, iOS, Android.
Can I use Canary Mail for free?
Both have a free tier, so you can try either at no cost before committing.
What is Canary Mail best used for?
Canary Mail is most often used for a privacy-conscious user who wants pgp encryption built into a mainstream-feeling client, someone who wants to avoid an open-ended subscription and prefers a lifetime purchase, a user who wants ai summaries without sending mail content through an unfamiliar third party indefinitely, someone consolidating several imap accounts into one client with unified search. Of those, a privacy-conscious user who wants pgp encryption built into a mainstream-feeling client and someone who wants to avoid an open-ended subscription and prefers a lifetime purchase are not what Capacities is typically brought in for.
What can Canary Mail do that Capacities cannot?
Canary Mail covers AI Copilot, AI Summaries, Smart Search, PGP encryption. Capacities covers Object-based notes, Daily notes, Properties and relations, Graph view.

Answered from the vendors’ own pages

Canary Mail: Does Canary Mail host my email?

No, it is a client over Gmail, Outlook, iCloud or IMAP accounts you already have.

Capacities: What platforms does Capacities support?

Capacities is available on Web, Desktop (macOS, Windows, Linux), and Mobile (iOS, Android), allowing seamless work across devices.

Source
Canary Mail: Is the lifetime licence still available?

Canary has offered a one-time lifetime purchase alongside its subscriptions; check current pricing on their site as terms have changed over time.

Capacities: Does Capacities have a free plan?

Yes, Capacities offers a free plan with unlimited spaces, objects, and blocks, device synchronization, unlimited custom object types, and 5GB media uploads total.

Source
Canary Mail: Does PGP encryption work automatically?

Only between users who both have PGP set up; it does not encrypt mail to recipients without it.

Capacities: What AI features does Capacities include?

Capacities includes an AI Assistant available on Pro and higher plans for brainstorming, summarization, and contextual Q&A about your notes.

Source
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