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Karbon

“Can Karbon become the full operating system for accounting firms worldwide by embedding payments, payroll, AI, and workflow automation into a single practice management platform?”

Founded2014
HQSan Francisco, CA, USA
FoundersStuart McLeod, Ian Vacin, John Freeman
Total raised$66M+
Latest roundSeries B
IndustryVertical SaaS / Accounting
The story

Founded in 2014 as a cloud-based practice management platform for accounting firms, Karbon began by solving workflow, email management, and team collaboration challenges for accountants. Over time it expanded into embedded financial services — launching Karbon Payments (powered by Stripe Connect) for billing and invoicing, and more recently adding payroll workflow integrations (Gusto, Wagepoint) and AI-powered features (Kai, built on Azure OpenAI). The company is evolving from a pure workflow tool into a full operating system for accounting firms, with financial operations, AI automation, and a growing ecosystem of integrations at its core.

Last 12 months
2024-09
2025-01
2025-02
2025-10
2026-01
Product timeline
2014
Karbon founded by Stuart McLeod, Ian Vacin, and John Freeman as an accounting practice management platform.· pivot
2021
Karbon achieved SOC 2 Type 2 certification, establishing enterprise-grade security credentials.· banking
2022
Karbon raised Series B of up to $66M led by Tidemark to accelerate global growth in accounting practice management.· acquisition
2024
Karbon launched Kai, an AI coworker product built on Azure OpenAI, integrated into practice management workflows.· banking
2024
Karbon introduced card payment surcharges feature within Karbon Payments, powered by Stripe Connect.· card
2025
Karbon launched Payroll product feature (Karbon + Wagepoint integration announced by CEO Ben Richmond) and deepened Gusto integration for payroll workflow management.· banking
The stack
7 layers disclosed in Karbon’s embedded-finance stack
Payments / PSP
Stripe ConnectStripe
Money movement
in the full report
Card issuing
in the full report
Card network
in the full report
Payroll
in the full report
Unified APIs
in the full report
Accounting
in the full report
Accounting gap: minor
11 more providers across 6 layers, with confidence-scored evidence and source URLs, are in the Embedded Finance Index report.
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