Is Proto.io or Spline cheaper?

Proto.io has the lower entry price — Proto.io starts at $0/mo and Spline at $0/mo.

Does Proto.io or Spline support HIPAA?

HIPAA support — Proto.io: —; Spline: —. Confirm current scope with the vendor.

Proto.io vs Spline

A sourced, side-by-side comparison for design tools. Proto.io has the lower entry price. Every figure links to the public page it was captured from — the vendor's own wherever the vendor publishes the number, otherwise the named public source — with the date we captured it.

Proto.io has the lower entry price — Proto.io starts at $0/mo, Spline at $0/mo. Free tier: Proto.io Yes, Spline Yes. HIPAA: Proto.io —, Spline —.

As of 2026-09-10 · figures link to their source below

Side by side

Proto.io

$0/mo entry

Entry price$0/mo (Free)

Free tierYes

HIPAA (BAA)—

SOC 2—

GDPR—

Best forFreelancers and small fixed-size product teams

Spline

$0/mo entry

Entry price$0/mo (Free)

Free tierYes

HIPAA (BAA)—

SOC 2—

GDPR—

Best forDesigners adding 3D hero scenes to marketing sites

Sources — Proto.io: proto.io (verified 2026-09-10) · Spline: spline.design (verified 2026-09-10)

Key features

Proto.io: High-fidelity prototyping with unlimited reviewers on every paid tier; Bundled-user flat pricing, which beats per-seat tools for small fixed teams; Full-featured 15-day trial with no credit card required

Spline: Browser-based 3D scene design with no local GPU pipeline to manage; Interactive 3D that embeds live into Webflow, Framer and Wix Studio sites; Variables, APIs and webhooks so a 3D scene can react to real app state

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