What is the difference between Spline and Miro?

Spline is best for Designers who want 3D on the web, while Miro is best for Teams that need visual collaboration and whiteboarding. Spline starts at Free and Miro starts at $8/user/mo.

Is Spline or Miro cheaper?

Spline starts at Free with a free tier. Miro starts at $8/user/mo with a free tier.

Is there a free alternative to Miro?

Both Spline and Miro offer free tiers.

Spline vs Miro

Spline is 3D design tool for the web with real-time collaboration and easy export to web formats, while Miro is online collaborative whiteboard platform for brainstorming, planning, and design. The biggest difference up front: Spline is free, while Miro starts at $8/user/mo. Spline is built for designers who want 3d on the web, whereas Miro targets teams that need visual collaboration and whiteboarding.

At a glance

	Spline	Miro
Best for	Designers who want 3D on the web	Teams that need visual collaboration and whiteboarding
Starting price	Free	$8/user/mo
Free tier	✓	✓
Open source	—	—
Free tier available	✓	✓
Open source	—	—
3D Design	✓	—
Diagramming	—	✓
Interactions	✓	—
Real-Time Collab	✓	—
Sticky Notes	—	✓
Templates	—	✓
Voting	—	✓
Web Export	✓	—
Whiteboards	—	✓

Spline

Strengths

Browser-based 3D design — no heavy software install required
One-click export to web formats (HTML, React, iframes) for production use
Free for 2 projects — generous enough for most small teams to get real work done
Includes interactions alongside the core feature set — fewer separate tools needed

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Output quality depends on your design skills — templates only go so far
Limited team/admin features if your organization eventually scales up

Try Spline → Full review

Miro

Strengths

Includes Whiteboards as a core feature, purpose-built for design workflows
Huge template library covers social media, presentations, marketing materials, and more
3 free boards — generous enough for most small teams to get real work done
Established product with 15+ years on the market and a mature ecosystem

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Feature-rich interface takes time to learn — not the simplest option for quick adoption
Output quality depends on your design skills — templates only go so far
Mobile experience lags behind the desktop version in features and polish

Try Miro → Full review

The bottom line

Pricing: Spline is completely free (Free for 2 projects), which makes it the obvious pick if budget is the top concern. Miro starts at $8/user/mo, but 3 free boards. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: Spline offers 3D Design, Interactions and Real-Time Collab that Miro lacks. Miro brings Diagramming, Sticky Notes and Templates that Spline does not have.

Team fit: Spline is geared toward small teams teams, while Miro is aimed at any size teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Where each tool shines: Spline's biggest strengths are: browser-based 3d design — no heavy software install required. one-click export to web formats (html, react, iframes) for production use. Miro's biggest strengths are: includes whiteboards as a core feature, purpose-built for design workflows. huge template library covers social media, presentations, marketing materials, and more.

Watch out for: With Spline, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Miro, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose Spline if...

You need a tool built for designers who want 3d on the web
Budget is a hard constraint — Spline is free, Miro is not
You specifically need 3D Design and Interactions
You care about one-click export to web formats (html, react, iframes) for production use
Your team size fits the small teams profile Spline is designed for

Choose Miro if...

Your profile matches its sweet spot: teams that need visual collaboration and whiteboarding
You specifically need Diagramming and Sticky Notes
You care about huge template library covers social media, presentations, marketing materials, and more
Your team size fits the any size profile Miro is designed for
The free tier works for you: 3 free boards