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Software · head to head

eBay vs Principle

E

eBay

Software

Buy and sell on the world's online marketplace

From
On request
Rated
-
Full reviewWebsite
P

Principle

Software

Animate your ideas, design better apps

From
$129/one-time
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: eBay final value fees run up to 13.6 percent of the sale price plus $0.30 per order in most categories, on top of any optional listing upgrade fees; Principle macOS only with no Windows or Linux editor available

Where they differ

Only the attributes on which eBay and Principle actually diverge.

Attributes where eBay and Principle differ
AttributeeBayPrinciple
Starting priceOn request$129/one-time
Pricing modelsubscriptionUnknown
PlatformsWebmacOS
FoundedUnknown2015

Identical on both: free tier (No), 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 eBay

Nothing recorded that Principle does not also cover.

Only in Principle

  • Timeline-based animation
  • Interactive prototypes
  • Touch gestures
  • Component reuse
  • Video export
  • Sketch import
  • Figma import
  • Driver animations

What people use each for

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

eBay

No use cases recorded yet. See the eBay review.

Principle

  • Mobile app prototypesnot eBay
  • Micro-interactionsnot eBay
  • Animation designnot eBay
  • User flow designnot eBay
  • Gesture-based interfacesnot eBay

Where each one falls short

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

eBay

  • Final value fees run up to 13.6 percent of the sale price plus $0.30 per order in most categories, on top of any optional listing upgrade fees

Principle

  • macOS only with no Windows or Linux editor available
  • No vector morphing capability for complex shape transformations
  • Limited asset creation tools; cannot create vectors or shapes directly within Principle
  • Sketch import flattens certain properties including paths, fills, borders, masks, blur effects, and text layers
  • Limited variable support, logical loops, and data input capabilities compared to tools like ProtoPie or Origami

Pricing, plan by plan

eBay

On request

No published plan breakdown. See the eBay review.

Principle

$129/one-time
  • License$129/one-time
    • One year of upgrades
    • Full access to all features
  • Upgrade License$99/year
    • Annual renewal for ongoing upgrades

Which should you pick?

Choose eBay if

Nothing in the data separates eBay from Principle on the points above - pick on price and on how each one feels to use.

eBay review

Choose Principle if

  • You need timeline-based animation.
  • You work on macOS.
  • You also want interactive prototypes.
Principle review

Questions people ask

Is eBay or Principle better?
Neither clearly leads. eBay starts at On request and Principle at $129/one-time, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, eBay or Principle?
eBay starts at On request and Principle at $129/one-time.
Does eBay or Principle run on more platforms?
eBay runs on Web. Principle runs on macOS.
What can eBay do that Principle cannot?
Principle covers Timeline-based animation, Interactive prototypes, Touch gestures, Component reuse.

Answered from the vendors’ own pages

Principle: Does Principle run on Windows or Linux?

No. Principle is macOS only and runs on Intel and Apple Silicon Macs. There is no Windows or Linux editor available; however, prototypes can be shared and viewed on any platform via web link.

Source
Principle: What is the cost of Principle?

Principle costs $129 for a one-time purchase with 1 year of upgrades included. After 1 year, upgrade licenses cost $99/year. A 14-day free trial is available with all features included.

Source
Principle: Can I import designs from Figma or Sketch into Principle?

Yes. Principle supports importing designs from Figma and Sketch with intelligent merging of re-imported files. Some Sketch properties such as paths, fills, borders, blur effects, masks, and text layers are flattened upon import.

Source
Principle: How do I share Principle prototypes with others?

Prototypes can be shared via web link with one click (File > Export > Share to Web). Recipients can view and interact with prototypes in any browser on any platform: Windows, macOS, Linux, Android, or iOS. No installation required.

Source
Principle: Can I create vector shapes and morphing animations in Principle?

Principle does not support vector morphing, where vector objects transform into other vector shapes. It also has limited asset creation capabilities and editing is restricted to basic operations like scale and rotate.

Source
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