Karbon

Karbon is a collaborative practice management software company based in California, with offices in San Francisco and Sausalito. Founded in 2014, Karbon specializes in a cloud-based workstream collaboration platform tailored for accounting firms. This platform integrates email, discussions, tasks, and workflows into a single system, enhancing visibility, efficiency, and connectivity across teams and clients. The core product is an award-winning platform that streamlines work and communication for accounting firms. It serves as a vital operating system, combining email management with task and workflow automation. This centralized hub helps firms manage client work and internal collaboration, improving transparency and productivity. In addition to technology, Karbon offers knowledge sharing, best-practice workflows, webinars, and onboarding services to support firms in achieving practice excellence. Karbon has raised approximately $66.2 million in funding and generates around $42 million in revenue, employing about 200 people. The company is dedicated to empowering accounting firms with innovative technology and collaborative tools to enhance operational efficiency and client communication.

Information Technology & Services Sausalito, United States Founded 2014 ~215 employees

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Employees
215
+2.4% in the 3 months to Jun 2025
Revenue / employee
$42.8K
Revenue ~$9.2M
Total funding
$128M
Last round Aug 2023
12-month attrition
17.8%
Tech: 15.1%
H1B filings, FY2026
1
Sponsors visas
Open jobs
16
Last 30 days

Salaries at Karbon

All salaries

2 salary profiles in India

Pay by level, gender and ethnicity

H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering1

Funding

  • Aug 2023 · $10.5M
  • Feb 2022 · Venture · $66M · Tidemark Capital
  • Dec 2021 · Series B · $26.9M · Five Elms Capital
  • Aug 2021 · Debt Financing · $5M · CIBC Innovation Banking
  • Mar 2021 · Series A · $10M · Five Elms Capital
  • Jan 2019 · Debt Financing · $3M · TIMIA Capital Corporation
  • Jun 2018 · Venture · $7M · Blackbird Ventures

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Karbon FAQ

How many employees does Karbon have?

Karbon has about 215 employees, up 2.4% over the 3 months to Jun 2025.

Does Karbon sponsor H1B visas?

Yes. Karbon filed 1 H1B (LCA) application in FY2026, according to the latest U.S. Department of Labor disclosures. It was for a Engineering role.

What is Karbon's revenue per employee?

Karbon makes about $43K in revenue per employee, based on $9.2M annual revenue and 215 employees.

How much does Karbon pay?

6figr has 2 salary profiles for Karbon in India, with pay broken down by role, level and gender on the Karbon salaries page. See Karbon salaries

How much funding has Karbon raised?

Karbon has raised $128.43M in total funding.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.