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Developer Tools · head to head

Hookdeck vs Spline

Hookdeck logo

Hookdeck

Developer Tools

Event gateway that receives, queues, retries and replays inbound webhooks

From
Free
Free plan
Yes
Visit HookdeckFull review
Spline logo

Spline

Design

3D design tool for the web

From
Free
Free plan
Yes
Visit SplineFull review

The short version

  • Spline is a free 3D design software.
  • Free plans on both; paid from $39/mo and $9/mo.
  • Only Hookdeck lists ingest and persist; only Spline lists 3D modeling.
  • Where Hookdeck falls short: pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries.
  • Where Spline falls short: AI generation features produce inconsistent and often distorted results, failing at basic depth perception tasks.
  • Prices and features on this page were last checked on 31 August 2026.

Where they differ

Only the attributes on which Hookdeck and Spline actually diverge.

Attributes where Hookdeck and Spline differ
AttributeHookdeckSpline
Pricing modelPer month by delivered event countFreemium
PlatformsWeb, Linux, macOS, WindowsWeb, iOS, Android, VR and AR
CategoryDeveloper ToolsDesign

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: founded for Hookdeck.

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 Hookdeck

  • Ingest and persist
  • Automatic retries
  • Filters and fan-out
  • Transformations
  • Local development CLI
  • Rate limiting

Only in Spline

  • 3D modeling
  • Real-time collaboration
  • Animations
  • Interactions
  • Code export
  • React
  • Next.js
  • Webflow

What people use each for

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

Hookdeck

  • A payments integration where losing a Stripe event during a deploy causes an order to go unfulfillednot Spline
  • Fanning one provider webhook out to several internal services without each subscribing separatelynot Spline
  • Debugging a partner integration by replaying the exact failing payload after shipping a fixnot Spline
  • Receiving production-shaped webhooks on a developer laptop without running a public tunnelnot Spline

Spline

  • Web 3D experiencesnot Hookdeck
  • Interactive prototypesnot Hookdeck
  • Product visualizationnot Hookdeck

Where each one falls short

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

Hookdeck

  • Pricing meters delivered events, so fan-out multiplies the bill: one inbound event routed to four services counts as four deliveries
  • Free-tier retention is three days, which is shorter than the time it typically takes to notice a failing integration, so the payloads needed for a replay are often already gone
  • It becomes a single point of failure in front of every third-party integration, and an outage there means every provider webhook queues or fails at once
  • The transformation layer runs JavaScript in a constrained environment, so anything that needs a database lookup or an external call has to happen downstream instead
  • For a team already running Kafka or SQS the value is mostly the console and the replay UI, which is a hard cost to justify against infrastructure they already operate

Spline

  • AI generation features produce inconsistent and often distorted results, failing at basic depth perception tasks
  • Limited to simpler designs - not suitable for high-poly, detailed production models
  • Performance degrades with complex scenes containing many objects and materials
  • Limited non-Apple platform coverage compared to cross-platform design tools
  • Tutorials are either too fast for beginners or too basic for advanced users

Pricing, plan by plan

Hookdeck

Free
  • DeveloperFree
    • Up to ten thousand events per month
    • Three-day retention
    • One user
  • Team$39/mo
    • Ten thousand events included
    • Unlimited users
    • Pay as you go metering above the included events
  • Growth$499/mo
    • Ten thousand events included plus metered usage
    • Thirty-day retention
    • Uptime and latency SLAs
  • EnterpriseOn request
    • Negotiated event volume
    • Custom retention
    • Dedicated support

Spline

Free
  • FreeFree
    • Unlimited projects
    • Basic exports
    • Community support
  • Pro$9/mo
    • Advanced exports
    • Custom domains
    • Password protection
  • Team$19/mo
    • Team collaboration
    • Version control
    • Admin controls

Which should you pick?

Choose Hookdeck if

  • You need ingest and persist.
  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows.
  • You also want automatic retries.
Hookdeck review

Choose Spline if

  • You need 3d modeling.
  • You want to start without paying.
  • You work on Web, iOS, Android, VR and AR.
  • You also want real-time collaboration.
Spline review

Questions people ask

Is Hookdeck or Spline better?
Neither clearly leads. Hookdeck starts at Free and Spline at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Hookdeck or Spline?
Hookdeck starts at Free and Spline at Free.
Does Hookdeck or Spline run on more platforms?
Hookdeck runs on Web, Linux, macOS, Windows. Spline runs on Web, iOS, Android, VR and AR.
Can I use Hookdeck for free?
Both have a free tier, so you can try either at no cost before committing.
What is Hookdeck best used for?
Hookdeck is most often used for a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled, fanning one provider webhook out to several internal services without each subscribing separately, debugging a partner integration by replaying the exact failing payload after shipping a fix, receiving production-shaped webhooks on a developer laptop without running a public tunnel. Of those, a payments integration where losing a stripe event during a deploy causes an order to go unfulfilled and fanning one provider webhook out to several internal services without each subscribing separately are not what Spline is typically brought in for.
What can Hookdeck do that Spline cannot?
Hookdeck covers Ingest and persist, Automatic retries, Filters and fan-out, Transformations. Spline covers 3D modeling, Real-time collaboration, Animations, Interactions.

Answered from the vendors’ own pages

Hookdeck: Is there a free plan?

Yes, ten thousand events a month with three-day retention and one user.

Spline: What is Spline's pricing?

Spline offers a Free plan with watermarked web exports, Starter at $12/month (billed annually) removing watermarks, Professional at $20/month with unlimited projects, and Enterprise with custom pricing. Viewers are unlimited on all plans.

Source
Hookdeck: How is usage counted?

By delivered events, so a single inbound webhook fanned out to three destinations counts as three.

Spline: Can Spline export 3D models to other tools?

Spline's export/import format support is more limited compared to traditional 3D tools like Blender. It focuses on web-first exports and native app code generation.

Source
Hookdeck: Can I replay a failed webhook?

Yes, individually or in bulk from the console, with the original payload.

Hookdeck: Does it work for outbound webhooks too?

Yes, the same queueing, retry and observability applies to webhooks you send.

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