Karbon Practice Management Software: What Accounting Firms Get

Karbon sells cloud practice management software to accounting firms from $59 per user a month on annual billing, and released its Kai AI coworker in early access to customers after announcing it on June 3, 2026.

For partners and practice managers the question is what that money buys. Karbon covers workflow, shared email, client requests, time tracking and billing in one system, and it competes with TaxDome and Canopy, which price differently and lean on different features.

This profile sets out what Karbon does, what it costs, which accounting systems it connects to, and which of its AI features are live rather than announced. It sits within the wider practice management software category.

What Karbon practice management does for a firm

Karbon is built around the idea that accounting work arrives by email and is then turned into tracked jobs. The platform holds client records, recurring work templates, task assignments, a shared inbox, client requests, time entries and invoices in one place.

Email triage is the feature that separates it from a task tracker. Teams share, assign and comment on emails inside the platform, so a message from a client becomes a visible piece of work with an owner. Karbon includes triage on every plan.

Time and billing sit alongside the workflow. The Team plan includes time tracking, budget reporting, billing and payments, and the higher plans include everything in Team. Firms that want a dedicated tool for this can compare it with the best time and billing software for accountants.

Karbon was founded in 2014 and has more than 400 employees. It reports customers in 40 countries and staff in the US, Australia, New Zealand, Canada and the UK. Its flagship customer event, Karbon Next, took place in San Diego in June 2026 with more than 200 customers and firm leaders attending.

Karbon pricing: three tiers, per user

Karbon publishes three plans, priced per user per month. The Team plan costs $59 on annual billing and $79 on monthly billing. The Business plan costs $89 on annual billing and $99 on monthly billing. Monthly billing is open only to teams of four or more. Enterprise pricing is quoted on request.

The plans differ mainly in limits. Team allows 35 workflow statuses, 40 work templates, 30 work types and 1,000 contacts. Business raises those to 50, 75 and 45, with unlimited contacts. Enterprise removes the caps and adds a dedicated Karbon contact and customisation.

Business also adds industry integrations. All plans include the wider integration ecosystem.

For a firm of 10 people on the Business plan with annual billing, the list price comes to $10,680 a year. Karbon prices by user, so cost rises with headcount, including staff who only occasionally touch client work.

Karbon integrations with Xero and QuickBooks

Karbon connects to both major small business ledgers. Xero announced an integration with Karbon on May 8, 2025, covering real-time two-way exchange of client, billing and payment data. Xero said it is available in the US and all major Xero markets, through the Xero App Store.

“We’re giving firms an efficient, more powerful foundation to run and grow their firms,” said Mary Delaney, chief executive of Karbon, at the time. Karbon also offers a separate two-way contact sync with Xero Practice Manager.

On the Intuit side, Karbon’s integrations page lists QuickBooks Online Accountant, which supports service delivery and billing workflows, and QuickBooks Time for time tracking. Firms choosing between the two ledgers can read the QuickBooks vs Xero comparison.

The page lists further connections for proposals and payments (Anchor, Ignition), document capture (Dext) and transaction categorisation (Uncat). Tax integrations include ProConnect, Juno, Filed, StanfordTax, TaxBandits (US only), TaxNow, Truss and FileForms. CCH Axcess, QX ROBO1040 and Zenwork Tax1099 are marked as coming soon.

Karbon puts the total at more than 80 native integrations. The tax list leans toward US filing tools, which matters for UK and EU firms assessing fit.

Karbon’s AI features: what has shipped

Karbon announced Kai on June 3, 2026. The company calls it an AI coworker built into the platform, drawing on a firm’s client records, workflows and communications. Our earlier report on Kai covers the launch in detail.

“AI multiplies when it’s inside the tools you already use”

Mary Delaney, Chief Executive Officer, Karbon

Kai is in limited early access for Karbon customers, with a waitlist for wider access. Karbon’s Kai page lists what is live: natural-language questions over firm data, workpaper creation, timesheet review and work prioritisation. Every agent action waits for the user’s approval.

The AI notetaker, which records client meetings, transcribes them and files summaries and action items, is listed as coming soon. So are agentic workflows that complete tasks end to end, queryable analytics, and deeper automation across onboarding.

Karbon also announced a public Model Context Protocol server, which connects the platform to outside AI tools, and agentic period-close checks. The company has not said which of these are generally available. Firms buying on the strength of the AI roadmap should ask for dated delivery commitments.

Karbon’s own 2026 State of AI in Accounting report, based on nearly 600 respondents, found 98% of firms use AI in some form.

Karbon vs TaxDome and Canopy

The three products overlap on workflow and billing, but they start from different places. Karbon starts with email and team collaboration. TaxDome bundles a CRM, client portal, mobile app, e-signature, proposals and billing, and is aimed at everyone from solo practitioners to firms of 50 or more staff.

Pricing is not directly comparable. TaxDome charges per seat per year, billed upfront: $800 for Essentials, $1,000 for Pro and $1,200 for Business on a one-year commitment. Its prices fall to $700, $900 and $1,100 on a three-year term. Karbon’s annual-billing equivalents are $708 and $1,068 per user.

Canopy, founded in 2014 and based in Draper, Utah, is built for US firms. It charges $74 (Standard), $109 (Plus) or $149 (Premium) per user per month on annual billing. Tax resolution for IRS cases costs $50 more. Canopy also opened its platform to outside developers with its API launch.

The practical split is this. Firms that run most client work through a shared inbox, or that have staff and clients in several countries, fit Karbon. US firms that handle IRS resolution work fit Canopy. Firms that want a client portal and e-signature in the same licence fit TaxDome.

Other options are listed on the Karbon alternatives page and in the guide to the best practice management software for accounting firms.

Who funds Karbon and who uses it

Karbon has raised nearly $100 million across nine rounds. The largest was a Series B of up to $66 million in February 2022, led by Dave Yuan of Tidemark. Five Elms, which had put $10 million into the company earlier, took part.

The company has not published a current customer count, revenue or profitability. It says users save time, but that figure comes from its own customer survey, not an audit.

Customers range from small practices to firms with private equity backing. Jeremy Allen of System Six said: “Karbon is our rocket booster that’s allowing us to grow at 40% to 50% year-over-year.”

Adoption is spread across the US, Australia, New Zealand, Canada and the UK. Xero’s decision to list the integration in its US app store, and its commitment to all major Xero markets, gives UK and EU firms a supported route to connect their client ledgers.

The Xero integration was announced with extra features to follow. Karbon has said Kai will roll out over the coming months, and the notetaker and agentic workflows are the next items on its list.