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App Builder Index

Internal tools platform · Ranked 32 of 37

Stacker

Client portals for consultancies, and not much else

Specification

CategoryInternal tools platform
Founded2017
Cheapest paid plan59 EUR
Free tierNo
Pricing modelNo free tier, paid plans from about 59 EUR per month
Official sitestacker.ai
Community ratings9
Last verified
Next scheduled check

Capabilities

CapabilityStatus
Full-stack backendNo, portal layer over a data source
Database includedYes, or connect Airtable and Salesforce
Auth includedYes, per-client permissions
Code exportNo
GitHub syncNo
One-click deployYes
Custom domainYes
Mobile or native outputResponsive web only
Team collaborationYes
Public API or MCP serverLimited
Self-hosting the outputNo

Axis scores

Reliability16%
3.9
Integrations16%
3.8
SEO and GEO13%
2.5
Design quality12%
3.6
Agent performance10%
2.9
Speed9%
3.5
Value9%
3.0
Scalability7%
3.0
API and MCP access5%
3.1
Code ownership3%
2.0

Every axis is scored from 0 to 5 stars. The percentage is that axis's published weight in the overall 3.3 rating.

Interface

Screenshot of the Stacker landing page, captured by App Builder Index
The Stacker landing page as captured at our last verification.

Our assessment in one line

A narrow, competent product with an awkward price. Stacker does per-client permissions over an existing data source better than most, and the portals look respectable without design work. But it starts at 59 EUR with no free tier, the AI layer is thin, and Softr now does a broadly similar job for less. Worth a look if the permission model is genuinely the hard part of your problem. Otherwise there are cheaper routes to the same portal.

The full review has the verdict, the dissenting view and 9 user ratings