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Design · head to head

ProtoPie vs Stacker

ProtoPie logo

ProtoPie

Design

Create advanced interactive prototypes

From
Free
Rated
-
Full reviewWebsite
Stacker logo

Stacker

No-Code

Permissioned portals over data that stays in Airtable, Salesforce or Postgres

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only ProtoPie has a free tier, so it costs nothing to try first.
  • Each has a real cost: ProtoPie the free plan allows 2 prototypes, 8 scenes per prototype and 50MB of cloud storage; Stacker there is no source export and no self-hosting, so leaving means rebuilding the entire interface and permission model elsewhere, even though the underlying records remain yours.
  • They diverge on capability: ProtoPie covers Interactive prototyping, Stacker covers Per-record permissions.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which ProtoPie and Stacker actually diverge.

Attributes where ProtoPie and Stacker differ
AttributeProtoPieStacker
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
PlatformsWindows, Macos, Web, Ios, AndroidWeb
CategoryDesignNo-Code
Founded2013Unknown

Identical on both: user rating (Not yet rated).

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 ProtoPie

  • Interactive prototyping
  • Data binding
  • Advanced interactions
  • Animation
  • Collaboration
  • Cloud sharing
  • Device testing
  • Code export

Only in Stacker

  • Per-record permissions
  • External user portals
  • Live connection to the source
  • Page and layout builder
  • Workflow actions
  • Custom domains and branding
  • User onboarding
  • Role based navigation

What people use each for

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

ProtoPie

  • Interactive prototype designnot Stacker
  • User testing and handoff managementnot Stacker
  • Team design collaborationnot Stacker

Stacker

  • Giving clients a login that shows only their own records inside an internal Airtable basenot ProtoPie
  • Contractor or franchisee portals where each account must see one slice of a shared datasetnot ProtoPie
  • Replacing a spreadsheet emailed to partners with a permissioned live view of the same datanot ProtoPie
  • Putting a usable interface on a Salesforce or Postgres dataset for users who should never see the underlying systemnot ProtoPie

Where each one falls short

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

ProtoPie

  • The free plan allows 2 prototypes, 8 scenes per prototype and 50MB of cloud storage
  • Free prototypes carry a watermark and shareable links require the Basic plan
  • Saving prototypes locally requires the Pro plan
  • Team libraries and handoff recordings require the Pro plan
  • Basic caps storage at 500MB and prototypes at 20
  • Single sign on, private servers, custom fonts and custom hardware integrations are Enterprise only
  • Enterprise requires a minimum of 3 seats and is priced by quote
  • Connect Core is a paid add on at $20 per user per month

Stacker

  • There is no source export and no self-hosting, so leaving means rebuilding the entire interface and permission model elsewhere, even though the underlying records remain yours.
  • Performance is bounded by the data source, so an Airtable base near its row limit or an API under rate limiting produces a slow portal that no amount of Stacker configuration will fix.
  • Pricing distinguishes internal editors from external portal users, so a portal that succeeds by adding hundreds of light-touch external users can end up costing more than the internal system it fronts.
  • Custom logic is limited to the actions and conditions the builder exposes, so anything resembling a calculation engine or a branching multi-step approval hits a wall and needs an external automation tool bolted on.
  • It is a portal and CRUD tool by design, with no offline mode, no native mobile application and no real reporting layer, so it will not be the only system a growing operation runs.

Pricing, plan by plan

ProtoPie

Free
  • FreeFree
    • 2 prototypes
    • 8 scenes per prototype
    • 50MB cloud storage
  • Basic$25/month
    • 20 prototypes
    • 10 scenes per prototype
    • 500MB storage
  • Pro$47/month
    • Unlimited prototypes
    • Unlimited handoff recordings
    • 5GB team storage

Stacker

On request
  • Stacker$undefined/month
    • Priced by workspace tier with caps on apps and users
    • External portal users charged differently from internal editors
    • Higher tiers add permission depth and support

Which should you pick?

Choose ProtoPie if

  • You need interactive prototyping.
  • You want to start without paying.
  • You work on Windows, Macos, Web, Ios, Android.
  • You also want data binding.
ProtoPie review

Choose Stacker if

  • You need per-record permissions.
  • You also want external user portals.
Stacker review

Questions people ask

Is ProtoPie or Stacker better?
Neither clearly leads. ProtoPie starts at Free and Stacker at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ProtoPie or Stacker?
ProtoPie has a free tier; the other does not. Paid plans start at Free for ProtoPie and On request for Stacker.
Does ProtoPie or Stacker run on more platforms?
ProtoPie runs on Windows, Macos, Web, Ios, Android. Stacker runs on Web.
Can I use ProtoPie for free?
Yes. ProtoPie has a free tier, so you can try it without paying. Stacker starts at On request.
What is ProtoPie best used for?
ProtoPie is most often used for interactive prototype design, user testing and handoff management, team design collaboration. Of those, interactive prototype design and user testing and handoff management are not what Stacker is typically brought in for.
What can ProtoPie do that Stacker cannot?
ProtoPie covers Interactive prototyping, Data binding, Advanced interactions, Animation. Stacker covers Per-record permissions, External user portals, Live connection to the source, Page and layout builder.

Answered from the vendors’ own pages

ProtoPie: How much does ProtoPie cost?

ProtoPie offers a free plan ($0/month), Basic at $25/month, and Pro at $47/month per editor. Annual billing offers up to 26% savings. Enterprise pricing is custom for minimum 3 seats.

Source
Stacker: Where does my data live?

In the source you connect: Airtable, Salesforce, HubSpot, Google Sheets or your own Postgres. Stacker reads and writes to it rather than becoming the system of record.

ProtoPie: Is there a free version of ProtoPie?

Yes. The free plan includes 2 prototypes, 8 scenes per prototype, and 50MB cloud storage. Perfect for trying the platform.

Source
Stacker: Can I export the app if I cancel?

No. The data stays in your source system, but the interface, permissions and workflows are Stacker configuration and do not come with you.

ProtoPie: What is included in the Pro plan?

Pro plan at $47/month includes unlimited prototypes, unlimited handoff recordings, 5GB team storage, local saving, and team libraries per editor.

Source
Stacker: Is it suitable for hundreds of external users?

Technically yes; check the pricing arithmetic first, because external portal users are charged separately and that is where the bill grows.

ProtoPie: What add-on products does ProtoPie offer?

Connect Core ($20/month per user), Connect Enterprise and Connect Embedded (custom pricing), and User Testing (custom pricing, annual-only for Pro plan users).

Source
Stacker: Will it replace Airtable?

No, it sits in front of Airtable. If the base itself is at its limits, the fix is moving the data to Postgres rather than changing the portal.

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