Stack
One login. Every tool.
Sign in once and the whole suite is connected, with your tools, your team, and your billing all running off the same account.
The Hub
Everything connects through Stack.
Log in once, and your identity, your team's roles, and your firm's subscriptions flow to every Cairn app automatically. There are no separate accounts to maintain, and no setup steps to repeat in each app.
Stack What Stack Does
Three things, and nothing else.
Cairn Stack handles the firm-level setup, including team access, billing, and permissions, so the rest of your team can focus on serving clients rather than managing their tooling.
Identity & Access
One secure login covers every Cairn tool. Invite your team and assign roles at the firm level, and every Cairn app inherits those permissions automatically, so a single invitation gives a new team member access to everything they need on day one.
Subscription & Billing
Browse the catalogue and subscribe to tools as your firm grows, all on a single invoice with transparent pricing. There are no hidden fees and no renewal surprises, and the firm only pays for the tools it actually uses.
Your App Launcher
Every tool your firm subscribes to is one click away from the dashboard, and your login, role, and permissions carry over instantly without any need to re-enter credentials or maintain separate accounts.
Every firm gets its own database.
Your firm's data lives in its own dedicated database, completely separate from every other firm. When you log in, every Cairn app connects to your firm's data and only your firm's data, so there is no path that could ever expose another firm's information to your team.
The Suite
Every Cairn app connects through Stack.
Identity, billing, and access are managed once at the firm level and inherited everywhere across the suite, which is real, in production, and still growing.
Cairn Statements
Bank statement processing and QuickBooks sync, built for accounting firms.
Learn moreCairn Toolbox
Accounting calculators and quick-reference tools, organized into purchasable packs.
Learn moreCairn Contacts
A client relationship and institutional knowledge base for accounting firms.
Learn moreCairn Payroll
PlannedPayroll review and reconciliation for firms whose clients use third-party payroll services.
Cairn Insights
PlannedA firm analytics and reporting dashboard for partners and owners.
Cairn Receipts
PlannedReceipt and expense processing for accounting firms, built alongside Cairn Statements.
Cairn Notices
PlannedIRS and state notice management with deadline tracking and resolution workflows.
Cairn Leaf
Personal note-taking for accounting professionals, with daily pages, quick capture, and ambient calm.
Learn moreCairn Post
In DevelopmentAn email intake assistant that classifies, extracts documents, and routes content to the right Cairn app.
Learn moreReady to build your stack?
We are onboarding firms one at a time to make sure every implementation is done right. Leave your information and we will reach out.