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Software · head to head

PaintTool SAI vs Subframe

PaintTool SAI logo

PaintTool SAI

Software

Lightweight digital painting and illustration software for Windows

From
5500/month
Rated
-
Full reviewWebsite
S

Subframe

Software

The AI-native design tool built for code

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Subframe has a free tier, so it costs nothing to try first.
  • Each has a real cost: PaintTool SAI windows-only software with no native Mac or Linux version.; Subframe the free plan is capped at 1 project, 10 pages, and 2 prototypes with limited AI usage and only 24 hour version history, versus unlimited AI on the $29 per editor per month Pro plan, as of August 2026.

Where they differ

Only the attributes on which PaintTool SAI and Subframe actually diverge.

Attributes where PaintTool SAI and Subframe differ
AttributePaintTool SAISubframe
Starting price5500/monthFree
Pricing modelone-timefreemium
Free tierNoYes
PlatformswindowsWeb

Identical on both: user rating (Not yet rated), category (Unknown).

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 PaintTool SAI

  • Pressure-Sensitive Tablet Support
  • Anti-Aliased Brushes
  • 16-bit ARGB Color Channels
  • Lightweight Performance
  • Crash Data Protection

Only in Subframe

Nothing recorded that PaintTool SAI does not also cover.

What people use each for

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

PaintTool SAI

  • Digital illustration and manga artnot Subframe
  • Line art and inking with pressure-sensitive pensnot Subframe
  • Lightweight painting on lower-spec computersnot Subframe
  • Character and concept art sketchingnot Subframe

Subframe

No use cases recorded yet. See the Subframe review.

Where each one falls short

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

PaintTool SAI

  • Windows-only software with no native Mac or Linux version.
  • Only supports 32-bit operation, lacking modern 64-bit performance benefits.
  • Lacks the advanced brush engine customization and layer effects found in tools like Photoshop or Clip Studio Paint.
  • No cloud sync or mobile app, unlike many modern illustration tools.

Subframe

  • The free plan is capped at 1 project, 10 pages, and 2 prototypes with limited AI usage and only 24 hour version history, versus unlimited AI on the $29 per editor per month Pro plan, as of August 2026.

Pricing, plan by plan

PaintTool SAI

5500/month
  • Standard License$5500/month
    • Perpetual license
    • All 1.x.x minor updates
    • Free upgrade path to version 2

Subframe

Free

No published plan breakdown. See the Subframe review.

Which should you pick?

Choose PaintTool SAI if

  • You need pressure-sensitive tablet support.
  • You work on windows.
  • You also want anti-aliased brushes.
PaintTool SAI review

Choose Subframe if

  • You want to start without paying.
Subframe review

Questions people ask

Is PaintTool SAI or Subframe better?
Neither clearly leads. PaintTool SAI starts at 5500/month and Subframe at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PaintTool SAI or Subframe?
Subframe has a free tier; the other does not. Paid plans start at 5500/month for PaintTool SAI and Free for Subframe.
Does PaintTool SAI or Subframe run on more platforms?
PaintTool SAI runs on windows. Subframe runs on Web.
Can I use Subframe for free?
Yes. Subframe has a free tier, so you can try it without paying. PaintTool SAI starts at 5500/month.
What is PaintTool SAI best used for?
PaintTool SAI is most often used for digital illustration and manga art, line art and inking with pressure-sensitive pens, lightweight painting on lower-spec computers, character and concept art sketching. Of those, digital illustration and manga art and line art and inking with pressure-sensitive pens are not what Subframe is typically brought in for.
What can PaintTool SAI do that Subframe cannot?
PaintTool SAI covers Pressure-Sensitive Tablet Support, Anti-Aliased Brushes, 16-bit ARGB Color Channels, Lightweight Performance.

Answered from the vendors’ own pages

PaintTool SAI: Is there a free trial for PaintTool SAI?

Yes, PaintTool SAI offers a 31-day free trial with full functionality before requiring purchase of a license.

Source
PaintTool SAI: What does the license cover?

The one-time 5,500 JPY purchase provides a perpetual license covering all minor updates within version 1.x.x; a major version 2 upgrade is offered for free.

Source
PaintTool SAI: What operating systems are supported?

PaintTool SAI runs on Windows XP through Windows 11, but only in 32-bit mode, requiring at least a 450MHz Pentium processor and 256MB of RAM.

Source
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