Proto.io vs Spline
Updated June 2026 · A structured head-to-head comparison.
The verdict
Both Proto.io and Spline are credible ui ux design tools, and the right pick comes down to your priorities.
Choose Proto.io if you want a longer free trial (15 days). App prototyping for designers and product teams.
Choose Spline if you'd rather have a lower starting price (free – $9/mo), a free plan to start on and a higher overall rating (4.6/5). 3D design in the browser.
Proto.io vs Spline: side by side
| Dimension | Proto.io | Spline |
|---|---|---|
| Starting price | From $24/mo | Free – $9/moWinner |
| Free plan | No | YesWinner |
| Free trial | 15 daysWinner | — |
| Pricing model | Subscription | Freemium |
| Best for | Product Teams, Designers | Designers |
| Platforms | Web, Ios, Android | Web, Mac, Windows |
| Rating | 4.2/5 | 4.6/5Winner |
Proto.io key facts
- Vendor
- Proto.io
- Pricing
- Subscription — From $24/mo
- Free tier
- Free trial (15 days)
- Platforms
- Web, Ios, Android
- Best for
- Product Teams, Designers
- Editor rating
- 4.2 / 5
- Founded
- 2011
- Headquarters
- Limassol, Cyprus
Spline key facts
- Vendor
- Spline
- Pricing
- Freemium — Free – $9/mo
- Free tier
- Yes
- Platforms
- Web, Mac, Windows
- Best for
- Designers
- Editor rating
- 4.6 / 5
- Founded
- 2020
- Headquarters
- Remote
Frequently asked questions
Is Proto.io better than Spline?
Neither is universally better — Spline edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Proto.io or Spline cheaper?
Spline is the more affordable of the two to get started, at free – $9/mo. Proto.io starts at from $24/mo; Spline starts at free – $9/mo.
Can Proto.io replace Spline?
Yes for most teams — both are ui ux design tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.