Karbon
Practice management platform for accounting firms that puts the team’s email at the centre: workflow, client requests, time and capacity planning hang off a shared inbox, with AI features branded Kai.
| Founded | 2014, Sausalito, California; product and engineering roots in Sydney |
|---|---|
| Founders | Stuart McLeod, John Freeman, Ian Vacin; Mary Delaney is CEO. |
| Ownership | Venture-backed (Tidemark, Five Elms Capital, Blackbird Ventures, DFJ) |
| Total funding | About $76m in announced rounds: $10m in 2021 and a Series B of up to $66m in 2022 |
| Last round | Series B, up to $66m, 2022, led by Tidemark, with Five Elms Capital |
| Employees | About 165 (2026) |
| Pricing | Per user per month; Team, Business and Enterprise tiers. Monthly billing only for teams of four or more. |
| From | $59 per user per month, billed annually (Team); $89 Business; $79 and $99 billed monthly; Enterprise on request |
| Free trial | Not offered; demo on request |
| Traction | More than 40,000 accounting professionals use it daily, in 34 countries; customers include System Six |
| Markets | Customers in 34 countries; team in the US, Australia, New Zealand, Canada and the UK |
| Peers | TaxDome, Pixie, Senta (IRIS), Canopy, Financial Cents |
Funding
- Announced rounds
- US$76m in two rounds
- Latest round
- Series B, US$66m (A$93m), February 2022, led by Tidemark Capital
Why it matters
Karbon has raised about $76 million in announced rounds, including a Series B of up to $66 million led by Tidemark, and employs around 165 people. It sells practice management to accounting firms on per-user pricing from $59 a month, with a four-seat minimum for monthly billing, and added AI features under the Kai name in 2026.
Accountio coverage
Karbon launches Kai as AI coworker for accounting firms in practice management push · News
Part of Accountio’s accounting technology coverage.
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