The Stacker agency.Portals on your own data.
Stacker turns the data you already have in Airtable, Salesforce, Sheets or Postgres into customer portals and internal tools, but a blank account is just potential. We build the portal on your records, scope user-level permissions so each client sees only their slice, wire forms and automations, and add your domain and SSO.
★★★★★Verified Trustpilot reviews · AI, automation & growth agency
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GeminiA Stacker agency builds the app, not just hands you a login.
Anyone can open a Stacker account. Connecting it to your real data, modelling permissions so each user sees only their slice, and shipping a portal your clients trust is a different job. Here are the four things we own.
- Customer portals
Customer portals your clients actually log into
A portal is only useful if each user sees exactly their own data and nothing else. We build the external-facing Stacker portal on top of your existing records, scope user-level data access so a client sees only their projects, invoices or tickets, and skin it with your logo, brand colours, a custom domain and SSO. Your clients log in, see their stuff, and never touch a spreadsheet you didn't mean to share.
See a typical portal - Internal tools
Internal tools on the data you already have
Your ops team doesn't need another spreadsheet, it needs an app with roles. We build internal tools on Stacker (CRMs, back-office, onboarding apps, approval flows) directly on your data sources, with list and detail layouts, forms that write back, and permissions so support sees one thing and finance another. The data stays where it lives; Stacker becomes the interface your team works in.
See the method - Data sources
Connected to Airtable, Salesforce, Sheets or Postgres
Stacker is most useful when it sits on top of your real system of record, not a copy of it. We connect it to your data sources (Airtable, Salesforce, Google Sheets, Postgres), map the fields and relationships, and wire automations so an action in the portal updates the right record. Your team keeps owning the database; the portal and the internal tool read and write to it live.
See the integrations - Enablement & ops
Your team owns it, with the permissions locked down
A portal that leaks data is worse than no portal. We set roles and permissions so each user only ever sees their slice, train your team to add users and tweak layouts without breaking access rules, and document how it all fits together. We're an automation and no-code agency first, so the Stacker build plugs into the wider stack you already run.
See no-code enablement
We build on Stacker permissions first, layouts second.
Most Stacker builds go wrong the same way: layouts get built before the permission model, and a client ends up seeing a record that wasn't theirs. So we model the roles and user-level data access first, lock them down by default, then build the portals, internal tools, forms and automations on top, on the data you already have.
- Audit · map your data sources, your users, and who should see what
- Model · roles, permissions and user-level data access, locked down by default
- Build · portals and internal tools with the layouts, forms and automations you need
- Enable · train the team so they add users and tweak layouts without breaking access
We build portals on real data every week.
We don't sell a partner tier. We build customer portals and internal tools on Stacker connected to live data sources, so we model permissions the way they actually need to work: locked down first, then layouts, forms and automations on top. That's exactly what's missing when a build starts with the pretty page and bolts on access rules later.
- We build on Stacker connected to real data sources every week, so we model permissions the way they actually need to work, not the way a demo glosses over.
- Permissions first: we lock user-level data access before anyone gets a login, so a portal never shows a client someone else's records.
- You leave autonomous: the build lives on your data and your Stacker account, so your team owns it and edits it without us.
- Honest about fit: if your app needs heavy custom logic or a native mobile build, we'll tell you a full app builder or code wins, and won't force it onto Stacker.
Stacker at the core, your data and roles around it.
We configure the parts that turn a Stacker account into a secure, useful app, then connect them to the data you already run on. Here's what a real build covers.
- Setup
Data sources & sync
We connect Stacker to your Airtable, Salesforce, Google Sheets or Postgres, map the fields and relationships, and keep the portal reading and writing to your real records instead of a stale copy.
- Setup
Roles & permissions
We set roles and user-level data access so each person sees only their slice (a client their own projects, support their queue, finance the billing view), the part of a portal that's easy to get wrong and dangerous when you do.
- Setup
Portals & custom domain
We build the external-facing portal with your logo, brand colours, a custom domain and SSO, so it reads as your product, not a generic no-code page your clients half-trust.
- Setup
List & detail layouts
We design the list, detail and dashboard layouts so the right fields show up in the right place, with filters and search that match how your users actually look for their records.
- Setup
Forms & automations
We build forms that write back to your data and wire automations so an action in the app (a status change, a new request) updates the right record and triggers the next step.
- Setup
Internal tools & handover
We build the CRMs, back-office apps and approval flows your team runs on daily, then document and train so you add users and tweak layouts without us.
We map your data and access, you leave with a plan.
Before quoting anything, we take 60 minutes to look at your data sources, your users and exactly who should see what. You leave with an honest read on what Stacker fits, how to model the permissions, and what to build first. Zero pitch, just a builder's take on your portal.
- An honest read on where Stacker fits your case
- The roles and permission model to lock down first
- The portal and internal tools worth building
- A frank take on what Stacker won't fit
How we run a Stacker build.
Five steps, in order. We don't build a layout before the permission model, we don't hand out logins before access is locked, and your team owns it at the end. Each step has a deliverable and you sign off before we move on.
- Step 1 · Data & access audit
Map your data sources and who should see what
We sit down with your team and look at the real picture: where your data lives (Airtable, Salesforce, Sheets, Postgres), who needs a portal, who needs an internal tool, and exactly which records each user should and shouldn't see. Half the value is telling you where Stacker fits and where it doesn't, so you don't build a portal on a problem a different tool solves better.
- Step 2 · Model permissions
Set roles and user-level access before anyone logs in
We model the roles and permissions first: client, support, finance, admin, each scoped to its own slice of the data. User-level data access means a client only ever sees their own projects, invoices or tickets. We lock this down by default and have someone on your side sign off on the access rules before a single user gets a login.
- Step 3 · Build portals & tools
Build the portal and internal tools on your data
We build the external-facing portal and the internal tools on top of your data sources: list and detail layouts, dashboards, forms that write back, and automations that move records through your process. The portal gets your logo, brand colours, a custom domain and SSO so it reads as yours. Everything sits live on your records, not a disconnected copy.
- Step 4 · Integrate & automate
Wire it into your data and your workflow
We connect Stacker to the rest of your stack: automations that sync records, write-backs to Airtable or Salesforce, and the triggers that fire the next step when a user acts in the portal. The data keeps living in your system of record; Stacker is the interface on top. Everything ships with its permissions mapped from day one.
- Step 5 · Enable & hand over
Train the team, then get out of the way
We train your team to run it: add and remove users, tweak layouts, adjust permissions without breaking access rules. We document how the data sources, roles and automations fit together so a new hire can pick it up. If you want to go deeper, our no-code training covers Stacker and the wider stack. If you want us on call for what scales next, we talk about that separately.
We're judged on the portal that ships.
No partner badge to display, so we lead with what matters: feedback from the teams whose Stacker portal we built, and whether their clients actually log in and use it after we left. Our Trustpilot reviews come from those teams, not from a marketing deck.
- The build lives on your data and your Stacker account, owned by your team
- Permissions and user-level access locked before anyone logs in
- Portals branded with your logo, custom domain and SSO
- Trustpilot reviews come from the teams we built it for
The questions we get asked on repeat.
What does a Stacker agency actually do?
A Stacker agency builds the customer portals and internal tools you want on top of your existing data, instead of leaving you with a blank account. We connect Stacker to your data sources (Airtable, Salesforce, Google Sheets, Postgres), model the roles and user-level permissions so each person sees only their slice, build the list and detail layouts, forms and automations, and skin the portal with your logo, custom domain and SSO. The point is a secure app your clients and team actually use, not a half-built page that leaks data.How much does a Stacker build cost?
It depends on scope: a single customer portal on one Airtable base is nothing like a multi-role internal tool wired to Salesforce with automations. We don't throw out a flat package. We start with a free 60-minute audit to map your data sources, your users and who should see what, then quote a fixed scope. The Stacker subscription itself you pay Stacker directly; we set up the build and permissions so it stays predictable.How does Stacker keep each user seeing only their own data?
Through roles and user-level data access, and getting that right is a big part of the job. We set permissions so a client sees only their own projects, invoices or tickets, support sees its queue, finance sees billing, and nobody sees a record they shouldn't. A portal that leaks one client's data to another is worse than no portal, so we lock access down by default and have your side sign off on the rules before any user gets a login.Which data sources can Stacker connect to?
Stacker connects to your existing data instead of forcing a new database: Airtable, Salesforce, Google Sheets and Postgres are the common ones, and it reads and writes live so the portal isn't a stale copy. We map the fields and relationships, set which ones each role can see and edit, and wire automations so an action in the app updates the right record. Your team keeps owning the system of record; Stacker becomes the interface on top of it.Can you build internal tools, not just customer-facing portals?
Yes, that's half the work. On the same data we build internal tools for your team: CRMs, back-office apps, onboarding flows, approval forms, staff portals. Each gets the list and detail layouts, forms and permissions that fit the role, so support, ops and finance each work in the view that's right for them. The portal faces your clients; the internal tool runs your team, both on the data you already have.Can we put our brand on the Stacker portal?
Yes, and for an external portal it matters. We skin it with your logo and brand colours, put it on a custom domain so the URL is yours, and set up SSO so clients log in cleanly. The goal is a portal that reads as your product, not a generic no-code page your clients half-trust. Inside, the layouts and permissions are tuned so it feels like a tool built for them, not a spreadsheet someone shared.When is Stacker NOT the right fit?
We'll tell you straight. Stacker is excellent for portals and internal tools that read and write your data with roles and permissions. It's not the right fit when your app needs heavy custom logic, complex interactions a no-code layout can't express, or a native mobile build. In those cases a full app builder or actual code wins, and we won't force it onto Stacker just because we build on it. Half the audit is being honest about where it fits.How long does a Stacker build take?
For a scoped portal (one set of data sources, clear roles, the core layouts), count a couple of weeks: audit and permission model first, then layouts, forms and automations, then handover. A multi-role internal tool wired to several data sources with automations runs longer. We split into batches so you get a working, secure portal fast, rather than waiting on one big build before anyone logs in.
Stop staring at a blank account. Build the portal right.
A 60-minute audit, your data and access mapped, a build plan with the permission model baked in. If your team can run it in-house after build, we'll hand you the playbook. If we're the right fit, we handle it.