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Design · head to head

Axure RP vs PaintTool SAI

Axure RP logo

Axure RP

Design

Prototyping and specification tool for conditional, data-driven interfaces

From
On request
Rated
-
Full reviewWebsite
P

PaintTool SAI

Design

Lightweight digital painting and illustration software for Windows

From
5500/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Axure RP a large prototype with variables and repeaters is effectively an application, but it has no version control diffing, no tests and no code review, so maintaining one for years is a genuine engineering cost carried by a designer.; PaintTool SAI windows-only software with no native Mac or Linux version.
  • They diverge on capability: Axure RP covers Conditional logic, PaintTool SAI covers Pressure-Sensitive Tablet Support.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Axure RP and PaintTool SAI actually diverge.

Attributes where Axure RP and PaintTool SAI differ
AttributeAxure RPPaintTool SAI
Starting priceOn request5500/month
Pricing modelPer user per monthone-time
PlatformsWindows, macOS, Webwindows

Identical on both: free tier (No), user rating (Not yet rated), category (Design).

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 Axure RP

  • Conditional logic
  • Repeaters
  • Generated specifications
  • Axure Cloud
  • Adaptive views
  • Team projects

Only in PaintTool SAI

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

What people use each for

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

Axure RP

  • Specifying an interface precisely enough that an external development contractor can build it without follow-up questionsnot PaintTool SAI
  • Prototyping a data-heavy administrative screen where sorting, filtering and pagination must behave realistically in testingnot PaintTool SAI
  • Working in an environment where prototypes may not be published to a vendor cloudnot PaintTool SAI
  • Documenting conditional business rules in a form both designers and business analysts can reviewnot PaintTool SAI

PaintTool SAI

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

Where each one falls short

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

Axure RP

  • A large prototype with variables and repeaters is effectively an application, but it has no version control diffing, no tests and no code review, so maintaining one for years is a genuine engineering cost carried by a designer.
  • The Windows and macOS builds have historically differed in behaviour and file handling, which causes conversion problems in mixed teams.
  • The output is never production code, so every rule you carefully modelled is reimplemented from scratch by engineers, and the two versions then diverge.
  • Subscription replaced the perpetual licence at RP 10, so teams that bought RP 9 outright must now pay annually to receive any new major version.
  • The visual design tooling is dated next to Figma, so most teams design elsewhere and import, which leaves two sources of truth to keep aligned.

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.

Pricing, plan by plan

Axure RP

On request
  • Pro$undefined/month
    • Full RP editor
    • Axure Cloud publishing
    • Generated specifications
  • Team$undefined/month
    • Team projects with check-in and check-out
    • Shared workspaces
    • Admin controls
  • Enterprise$undefined/month
    • SSO
    • Axure Cloud for Business on customer infrastructure
    • Priority support

PaintTool SAI

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

Which should you pick?

Choose Axure RP if

  • You need conditional logic.
  • You work on Windows, macOS, Web.
  • You also want repeaters.
Axure RP review

Choose PaintTool SAI if

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

Questions people ask

Is Axure RP or PaintTool SAI better?
Neither clearly leads. Axure RP starts at On request and PaintTool SAI at 5500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Axure RP or PaintTool SAI?
Axure RP starts at On request and PaintTool SAI at 5500/month.
Does Axure RP or PaintTool SAI run on more platforms?
Axure RP runs on Windows, macOS, Web. PaintTool SAI runs on windows.
What is Axure RP best used for?
Axure RP is most often used for specifying an interface precisely enough that an external development contractor can build it without follow-up questions, prototyping a data-heavy administrative screen where sorting, filtering and pagination must behave realistically in testing, working in an environment where prototypes may not be published to a vendor cloud, documenting conditional business rules in a form both designers and business analysts can review. Of those, specifying an interface precisely enough that an external development contractor can build it without follow-up questions and prototyping a data-heavy administrative screen where sorting, filtering and pagination must behave realistically in testing are not what PaintTool SAI is typically brought in for.
What can Axure RP do that PaintTool SAI cannot?
Axure RP covers Conditional logic, Repeaters, Generated specifications, Axure Cloud. PaintTool SAI covers Pressure-Sensitive Tablet Support, Anti-Aliased Brushes, 16-bit ARGB Color Channels, Lightweight Performance.

Answered from the vendors’ own pages

Axure RP: Can I still buy a perpetual licence?

No. Axure moved to subscription with RP 10. Existing perpetual licences keep working but do not receive new major versions.

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
Axure RP: Can prototypes be hosted on our own servers?

Yes. Prototypes export as a self-contained HTML bundle, and Axure Cloud for Business can be deployed on customer infrastructure.

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
Axure RP: Is it worth it if we already use Figma?

Only if you need conditional logic, data-bound components or generated specifications. For click-through review of static screens it adds cost without adding capability.

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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