Tool profile
Stacker: cost, fit and limits
Stacker is a no-code portal builder made by Stacker Software Ltd that places a branded, login-protected app over data held in Airtable or Google Sheets so clients, partners and staff see only the records they should.
What to know first
Stacker sells Starter at $29 a month, Plus at $149 a month and a custom Enterprise plan. Starter allows one app, 50 external users and five internal users. Plus raises records to 100,000 per app and external users to unlimited. A 30-day trial with all features needs no card. The pricing page ties no AI feature to a plan, so any AI claim needs confirming with the vendor.
Stacker at a glance
| Maker | Stacker Software Ltd, Not stated by the vendor |
|---|---|
| Free plan | Free trial only |
| Entry price | $29 per month (Starter) |
| API access | No |
| Category | Best AI Client Portal Software in 2026, rank 8 of 11 |
| Website | stackerhq.com |
Who Stacker is best for
Teams that live in Airtable
Stacker for Airtable is on every plan, so a team can expose existing bases to customers without moving data. That avoids a migration.
Operations teams with partner views
Roles limit what each outside user sees, and Plus allows three roles per app, which suits a vendor and a customer view.
Larger firms with SQL data
Enterprise adds SQL and Salesforce connectors, SSO and unlimited roles, tables and apps for firms that need a real data source.
Stacker plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Starter | $29 per month, billed monthly | One app, 50 external users, 5 internal users, 10 tables, one portal on a custom domain, Airtable and Google Sheets. |
| Plus | $149 per month, billed monthly | 100,000 records per app, unlimited external users, three roles and 20 tables per app, custom CSS and scripts. |
| Enterprise | Custom quote | SSO, SQL and Salesforce connectors, unlimited roles, tables and apps, account manager, custom SLAs and security review. |
Checked November 2026.
What Stacker does
- Airtable and Sheets portals
- Apps are built on Airtable or Google Sheets data, so the sheet stays your source of truth while Stacker supplies the login and views. Teams keep editing in the sheet while clients see a tidy branded view, which avoids a data migration.
- External user caps
- Starter allows 50 external users and Plus allows unlimited, which is the line where a growing customer list forces an upgrade. Growth in customer numbers is the usual reason to move from the $29 plan to the $149 plan.
- Role-based access
- Plus gives three roles per app and Enterprise gives unlimited, controlling what each outside person sees or edits. Without roles, every outside user would see the same records, so this is the basis of customer-specific views.
- Custom code
- Plus adds custom CSS and scripts, giving a developer room to shape the portal beyond the templates. Teams without a developer will probably not use it, but it is the route to a tailored layout.
- Enterprise connectors
- SQL and Salesforce connectors and SSO come on Enterprise, for firms whose client data sits outside spreadsheets. Firms with data in a warehouse or CRM can surface it to clients without exporting spreadsheets first.
How Stacker handles your data
Stacker's privacy policy lives on the stacker.ai domain. For Google user data it says the data is not used to develop or train generalised models, and it does not address training on other customer data. Synced content is deleted when the workspace is deleted, and Google tokens are deleted on disconnect. No general retention period, hosting region or certification is stated. The policy says servers sit in a controlled, secure environment and gives no country or registered address.
Where Stacker falls short in practice
- Starter is tight. Starter allows one app, five internal users and 10 tables, so a second portal or a bigger team pushes you to $149 quickly. A second portal or a bigger team therefore moves you to $149 a month, a fivefold price step.
- AI is separate. The pricing page names no AI feature, and the footer links Stacker AI as a separate offering for agents rather than a plan feature. Buyers wanting AI in the portal should ask Stacker what it can do today and where the data is processed.
- Not a billing tool. The pages describe data views and roles, with no invoicing, contracts or payment features, so a service firm needs other software. A firm that bills, signs and collects payment inside the portal will need a second system alongside Stacker.
Works with
Alternatives to Stacker
Stacker: common questions
Does Stacker have AI features?
The pricing page names none. The footer links to Stacker AI at stacker.ai as a separate offering for AI agents, not tied to a plan. Treat AI as outside the portal product until the vendor ties it to a tier in writing.
Do I need Airtable to use Stacker?
No. The Starter plan lists Airtable, Google Sheets and Stacker tables as data sources, so you can start on Stacker's own tables. Airtable users benefit most because Stacker for Airtable is included on every plan, and Salesforce and SQL are Enterprise connectors.
How many outside users can a Stacker portal have?
Starter allows 50 external users and Plus allows unlimited. Starter also caps internal users at five, so a customer-facing app with a staff of eight needs Plus. Check how the vendor counts an external user before you estimate. Starter needs an upgrade at that point.
What is the Stacker trial?
The pricing page describes a 30-day trial with all features and no card, applying to each plan, with the same terms on Starter, Plus and Enterprise. That gives a full month, so you can test Plus features such as custom CSS, roles and record limits before paying $149 a month.
Where does Stacker store my data?
The policy names no hosting region, saying only that servers sit in a controlled, secure environment. Synced content is deleted with the workspace. If you hold regulated client data, ask for the subprocessor list and region in writing, since neither is published.