The Karbon stack
Karbon is a practice-management system built around email and client work: every message, task and job sits against the client, and the team works from a shared timeline rather than from inboxes. A practice that runs Karbon has made a decision about how the firm communicates, and the stack around it should be chosen to respect that decision rather than to route around it.
Updated 3 September 2026, reviewed annually. By Trent McLaren.
14 tools listed, grouped by what each one is for
Ledger & accounting that works with Karbon
2 ledger and accounting tools · all ledger and accounting tools
Bookkeeping automation that works with Karbon
1 bookkeeping automation tool · all bookkeeping automation tools
AP & expense that works with Karbon
2 accounts payable and expense tools · all accounts payable and expense tools
Payments & billing that works with Karbon
2 payments and billing tools · all payments and billing tools
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Ignition
Proposals & engagement
Automate your agreements, billing, and payments effortlessly.
Works withXeroQuickBooksSlack+6
Australia onlyUnclaimed listing
-

Anchor
Proposals & engagement
Turns a signed client agreement into the billing that follows it — invoicing, collection and reconciliation without re-keying the scope.
Works withKarbon
Unclaimed listing
Tax & compliance that works with Karbon
1 tax and compliance tool · all tax and compliance tools
Reporting & dashboards that works with Karbon
1 reporting and dashboards tool · all reporting and dashboards tools
Practice management that works with Karbon
1 practice management tool · all practice management tools
Document management that works with Karbon
2 document management tools · all document management tools
AI assistants that works with Karbon
1 AI assistance tool · all AI assistance tools
Proposals & engagement that works with Karbon
3 proposals and engagement tools · all proposals and engagement tools
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Ignition
Proposals & engagement
Automate your agreements, billing, and payments effortlessly.
Works withXeroQuickBooksSlack+6
Australia onlyUnclaimed listing
-

GoProposal
Proposals & engagement
Menu-based pricing and proposals for accounting firms, with a maintained engagement letter library behind them.
Works withXeroKarbonSenta
United Kingdom · United States · Australia · Canada onlyUnclaimed listing
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Anchor
Proposals & engagement
Turns a signed client agreement into the billing that follows it — invoicing, collection and reconciliation without re-keying the scope.
Works withKarbon
Unclaimed listing
Signing & verification that works with Karbon
3 document signing and verification tools · all document signing and verification tools
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Ignition
Proposals & engagement
Automate your agreements, billing, and payments effortlessly.
Works withXeroQuickBooksSlack+6
Australia onlyUnclaimed listing
-

GoProposal
Proposals & engagement
Menu-based pricing and proposals for accounting firms, with a maintained engagement letter library behind them.
Works withXeroKarbonSenta
United Kingdom · United States · Australia · Canada onlyUnclaimed listing
-
IdentityCheck
Signing & verification
Automated ID verification for accountants
Works withXero Practice ManagerKarbonFYI
Unclaimed listing
Marketing & client growth that works with Karbon
1 marketing and client growth tool · all marketing and client growth tools
Building a practice around Karbon
What Karbon is the record of
In a Karbon practice, Karbon is the record of the client relationship: who they are, what has been said, what is due, and who owns it. That is the thing every other tool should read from or write to. A signing tool that files the signed letter against the Karbon client, a notetaker that writes the meeting into the client timeline, a document tool that links the file to the job: those are integrations that respect the record. A tool that keeps its own client list is a second record, and second records drift.
What to add first
The ledger comes first because it is where the client's numbers live, and the connection matters for job status and for the practice view of who has not reconciled. Then the document and signing layer, because engagement letters, authorities and client documents are the paperwork Karbon's jobs are waiting on. Then proposals and billing, so an accepted proposal creates the job and the billing schedule without rekeying. Meeting and drafting assistants come after the core is settled, because they are only useful when the client record they write to is trusted.
The grid on this page lists the tools in the directory that state a Karbon integration, grouped by what each is for; a category page missing from it is a category no listed tool has yet declared for Karbon, not a gap in what exists.
Working from the timeline
The discipline that makes a Karbon practice work is that nothing happens outside the timeline: client email goes through it, tasks are assigned in it, and a partner reviewing a job reads the history there. Tools that send their own notifications by email, outside Karbon, quietly undo that. When shortlisting, ask each vendor where their notifications land and whether they can be routed into Karbon rather than beside it.
What Karbon does not do
It is not a ledger, not a tax tool, not a document management system in the archival sense, and not a signing platform. Firms that try to make it those things end up with workarounds the next hire cannot follow. The stack exists to fill those roles; the guide's job is to say which order to fill them in and what to check for at the join.
Pricing and the seat count
Karbon, like most practice systems, is priced per user per month, so the stack around it should be judged on the same basis: a tool priced per user multiplies with headcount; one priced per client or per document does not. The directory records what each vendor publishes; it does not tell a firm what to charge, and nothing here is fee advice.
Our coverage of Karbon
- Five jobs I used to do by hand in Karbon. Now I just ask.
- Firm owners are vibe coding their own integration to Karbon. No developers required.
- The best AI meeting assistants for accounting firms, honestly ranked
- MCP for Accountants, Explained (Without the Jargon)
- Advisory Amplified 2026: dates, cities, cost and whether it is worth your day
Karbon integrations, answered
- What software integrates with Karbon?
- The grid on this page lists every directory tool that states a Karbon integration, grouped by category: ledgers, documents, signing, proposals, tax and AI assistants among them. Counts change as vendors and firms add integrations.
- What should a firm connect to Karbon first?
- The ledger, then documents and signing, then proposals and billing, then meeting and drafting assistants. The order follows what Karbon's jobs are waiting on.
- Does a tool need a native Karbon integration to be worth running?
- Not always, but a tool with no integration keeps its own client record and its own notifications, and both drift from the timeline. Ask where a tool's notifications land and whether it can write to the Karbon client.
- Is this a comparison of Karbon against other practice systems?
- No. The Firm does not publish comparison content between practice-management tools. This guide is about the stack around Karbon for firms that already run it; the other hubs have their own pages.
- Does The Firm charge vendors to be listed?
- No. Listing is free and claiming a listing is free. Paid placement is labelled as such, and every outbound link to a vendor carries a sponsored attribute. Paying never changes how a tool is described.
- Works with Xero
- Works with QuickBooks Online
- Works with MYOB
- Works with Sage
- Works with NetSuite
- Works with FreshBooks
- Works with Xero Practice Manager
- Works with FYI
- Works with Shopify
- Works with Amazon
- Works with HubSpot
- Works with Google Workspace
- Works with Microsoft 365
- Works with Power BI
- Works with Zapier
- Works with AccountKit
- Works with TaxCalc
- Works with Canopy
- Ledger & accounting
- Bookkeeping automation
- AP & expense
- Payments & billing
- Tax & compliance
- Payroll
- Reporting & dashboards
- Forecasting & planning
- Consolidation & close
- Data & integrations
- Practice management
- Document management
- AI assistants
- Security, backup & IT
- Proposals & engagement
- Signing & verification
- Marketing & client growth
- Crypto & digital assets
- Corporate & legal