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Productivity · head to head

Bluemail vs Capacities

Bluemail logo

Bluemail

Productivity

Free multi-account email client from Blix with unified inbox, smart filters and calendar

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: Bluemail its AI features are minimal next to Spark or Canary, so users specifically wanting AI drafting or summaries will find it thin.; Capacities pro plan pricing not prominently displayed on website
  • They diverge on capability: Bluemail covers Unified inbox, Capacities covers Object-based notes.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Bluemail and Capacities actually diverge.

Attributes where Bluemail and Capacities differ
AttributeBluemailCapacities
Pricing modelquoteUnknown
PlatformsWindows, macOS, Linux, 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 Bluemail

  • Unified inbox
  • Smart filters
  • Colour-coded accounts
  • Integrated calendar
  • Snooze and reminders
  • Business tier

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.

Bluemail

  • Someone with five or more email accounts across providers who wants one free unified inboxnot Capacities
  • A user who wants automatic mail sorting without configuring rules by handnot Capacities
  • An IT team evaluating a lower-cost alternative to Outlook for a mixed-provider organisationnot Capacities
  • A budget-conscious user who does not need AI drafting or PGP encryption, just consolidationnot Capacities

Capacities

  • Productivitynot Bluemail
  • Collaborationnot Bluemail
  • Task managementnot Bluemail
  • Organizationnot Bluemail

Where each one falls short

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

Bluemail

  • Its AI features are minimal next to Spark or Canary, so users specifically wanting AI drafting or summaries will find it thin.
  • The interface exposes a large number of settings and toggles, which makes initial setup slower than more opinionated clients.
  • Business pricing is not published, so an organisation has to go through a sales conversation to learn total cost.
  • Free-tier support is largely community forum and help articles rather than direct responsive support.
  • Some optional cloud features, such as certain sync and backup functions, have historically required a paid add-on despite the base app being free.

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

Bluemail

Free
  • Bluemail$undefined/month
    • Free for individual use, unlimited accounts
    • Business tier priced per seat, contact sales
    • Optional cloud sync add-ons

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 Bluemail if

  • You need unified inbox.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want smart filters.
Bluemail 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 Bluemail or Capacities better?
Neither clearly leads. Bluemail 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, Bluemail or Capacities?
Bluemail starts at Free and Capacities at Free.
Does Bluemail or Capacities run on more platforms?
Bluemail runs on Windows, macOS, Linux, iOS, Android. Capacities runs on Web, macOS, Windows, Linux, iOS, Android.
Can I use Bluemail for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bluemail best used for?
Bluemail is most often used for someone with five or more email accounts across providers who wants one free unified inbox, a user who wants automatic mail sorting without configuring rules by hand, an it team evaluating a lower-cost alternative to outlook for a mixed-provider organisation, a budget-conscious user who does not need ai drafting or pgp encryption, just consolidation. Of those, someone with five or more email accounts across providers who wants one free unified inbox and a user who wants automatic mail sorting without configuring rules by hand are not what Capacities is typically brought in for.
What can Bluemail do that Capacities cannot?
Bluemail covers Unified inbox, Smart filters, Colour-coded accounts, Integrated calendar. Capacities covers Object-based notes, Daily notes, Properties and relations, Graph view.

Answered from the vendors’ own pages

Bluemail: Is Bluemail really free?

Yes, for individual use with unlimited accounts; the paid tier is Blue Mail for Business, aimed at teams.

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
Bluemail: Does it support Gmail and Outlook together?

Yes, it unifies accounts from any of the major providers plus generic IMAP and SMTP in one inbox.

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
Bluemail: Does it have AI features like Spark or Canary?

Only basic smart filtering; it does not offer AI drafting or thread summarisation at the level of those competitors.

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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