Principle
Create interactive UI prototypes with timeline-based animations
- Also known as
- principle
Available worldwide · Popular in: US
What is Principle?
A native macOS application for designing animated and interactive user interfaces across web, mobile, and desktop platforms, featuring keyframe-based animation controls and automatic transitions between artboards.
Principle pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
$129 per computer. Renewal available for $99 to access new features released after initial purchase.
Principle License
Single license per computer with one year of new feature access
- Timeline animation with keyframes and easing customization
- Multi-artboard screen flow design
- Automatic animations between named layers on different artboards
- Hover and mouse wheel event support
- Import from Figma and Sketch with intelligent merging
- Web-based sharing and preview
- Video export functionality
- One year of new feature access included
Add-ons
- License Renewal$99 one-time
What Principle does
The capabilities that matter for mockup tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Architecture model
- Local mac native app
- Css flexbox based auto layout engine
- -
- Stateful interactive prototyping with variables and logic
- ✓
- Component variants and property overrides
- -
- Design token variable mapping colors spacing typography
- -
- Real time multiplayer crdt cursor sync
- -
- Developer mode handoff environment css swift export
- -
- Advanced micro interaction animation smart animate
- ✓
- Third party plugin ecosystem API
- -
- Offline editing mode with conflict resolution
- -
- SOC2 type ii
- -
- Gpl or permissive oss license
- -
- Pricing model
- Flat lifetime license
Platform & deployment
Independently observed- macOS
Integrations (2)
Independently observed- Figma←•
- Sketch←•
Principle FAQ
Common questions about Principle, answered from independent, dated evidence.
What is Principle?
A native macOS application for designing animated and interactive user interfaces across web, mobile, and desktop platforms, featuring keyframe-based animation controls and automatic transitions between artboards. It is indexed under Mockup Tools.
How much does Principle cost?
Principle is a paid product; published pricing starts at $129. There is no free tier. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.
What platforms does Principle support?
Principle supports macOS. Platforms we have not confirmed are simply not listed here rather than ruled out.
Where is Principle available?
Principle is available worldwide. Its primary market is the United States.
Principle alternatives
Other mockup tools we track, ranked by the same independent score.
Compare Principle
Side by side against other mockup tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Principle, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Pricing transparency | 75 | 0.08 | 6.3 | ✓ |
| Capabilities | 46 | 0.04 | 1.8 | ✓ |
| Price level | 25 | 0.05 | 1.3 | ✓ |
| Integrations | 14 | 0.05 | 0.7 | ✓ |
| Reliability | 0 | 0.06 | 0.0 | - |
| Security posture | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 4 items | mediumsource · 2026-09-10 · 57% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Pricing model: flat_lifetime_license · Architecture model: local_mac_native_app · Advanced micro interaction animation smart animate: Yes · Stateful interactive prototyping with variables and logic: Yes | mediumsource · 2026-09-01 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 2 | mediumsource · 2026-09-01 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | mediumsource · 2026-09-01 · 50% |
Pricing
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