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Karbon

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What Karbon is

Karbon is cloud practice management software for accounting firms, bringing workflow, team communication, client services, and billing together. Teams can build workflow templates, assign tasks, schedule work, and use dashboards to follow activity. They can share and comment on emails and coordinate work around tasks and clients. Client tools include profiles, activity timelines, automated requests, a portal, and document sharing. Billing and payment processing are available, with US fees that vary by payment type. The integrations directory includes Xero, Xero Practice Manager, Zapier, and Calendly, and an API supports custom solutions using listed programming languages. Karbon is available on the web, iOS, and Android. Team costs $59 per user per month when billed annually; monthly billing is $79 per user and available only to teams of four or more. Business is $89 per user per month annually, and Enterprise has custom pricing. Karbon says its web application is SOC 2 Type 2 certified and uses TLS for data transmissions.

Who it suits

Karbon suits accounting firms that need workflow coordination, client communication, document sharing, and billing in one platform. Its finite Team and Business usage limits may be relevant when choosing a plan.

What it does well

  • Workflow templates, task assignment, scheduling, and dashboards
  • Client portal, activity timelines, requests, and document sharing
  • Billing and payment processing included
  • API and listed integrations such as Xero and Zapier
  • 24/7 support and 99.9% uptime listed for all plans

What to know first

  • No free plan is listed
  • Team and Business plans have finite usage limits
  • Monthly billing requires a team of at least four
  • US payment processing fees vary by payment type

Limits

Team includes 35 workflow statuses, 40 work templates, 30 work types, 3 teams, 10 contact types, 15 placeholder job roles and a 6-month reporting period. Business raises those limits to 50 workflow statuses, 75 work templates, 45 work types, 10 teams, 25 contact types and 25 placeholder job roles, with the same 6-month reporting period; Enterprise lists unlimited usage limits and a custom reporting period.

Plans

PlanBilled and limitsPrice
TeamPer user, paid annually; or $79/month per user, paid monthly. Monthly subscription only available for teams of 4+. · 35 workflow statuses · 40 work templates · 30 work types · 3 teams · 10 contact types · 15 placeholder job roles · 6-month reporting period$59 a month
BusinessPer user, paid annually; or $99/month per user, paid monthly. Monthly subscription only available for teams of 4+. · 50 workflow statuses · 75 work templates · 45 work types · 10 teams · 25 contact types · 25 placeholder job roles · 6-month reporting period$89 a month
EnterpriseCustom pricing. · Unlimited usage limits · custom reporting period · dedicated Karbon contact · customizationOn request

As karbonhq.com lists them, read 29 Sept 2026. The maker's own page has the final word.

Getting started

  1. Visit https://karbonhq.com/.
  2. Choose Team or Business, or contact Karbon about Enterprise pricing.
  3. Select annual billing, or monthly billing if your team has at least four users.
  4. Use Karbon on the web, Android or iOS, or connect through its API.

Verdict

Karbon combines accounting-firm workflow and client tools with billing, communication, and integrations. Compare plan limits and billing terms with your team’s needs; Enterprise pricing is custom.

Questions

How much does Karbon cost?

Team costs $59 per user per month with annual billing, or $79 per user per month with monthly billing. Business costs $89 per user per month annually, or $99 per user per month monthly. Monthly subscriptions are available only for teams of four or more; Enterprise pricing is custom.

Does Karbon have a free plan?

No. Karbon is a paid product.

Which platforms does Karbon support?

Karbon is available on the web, Android and iOS, and provides an API.

What payment processing fees does Karbon list for the US?

Standard cards are 2.6% + $0.30, premium cards are 3.6% + $0.30, and American Express is 3.9% + $0.30. ACH direct debit is 1% + $0.30, capped at $5.00.

Which integrations are listed?

The integrations directory includes Xero, Xero Practice Manager, Zapier and Calendly.

What security certifications does Karbon state?

Karbon says its web application is SOC 2 Type 2 certified and uses TLS to encrypt data transmissions. It says its information security management system follows ISO 27001 requirements, but it is not independently certified as ISO 27001 compliant.

Facts from Karbon's own pages

API
Karbon provides an API and says custom solutions can be built using Java, JavaScript, Objective-C, C#, PHP, Python, or Ruby. · karbonhq.com, 29 Sept 2026
Billing
Karbon offers billing and payment processing, with listed US fees of 2.6% + $0.30 for standard cards, 3.6% + $0.30 for premium cards, 3.9% + $0.30 for American Express, and 1% + $0.30 (max $5.00) for ACH direct debit. · karbonhq.com, 29 Sept 2026
Client services
Karbon includes client profiles, activity timelines, automated requests, a client portal, and document sharing. · karbonhq.com, 29 Sept 2026
Communication
Teams can share, assign, and comment on emails and collaborate around work, tasks, and clients. · karbonhq.com, 29 Sept 2026
Company footprint
Karbon says it has customers in 34 countries and team members based in the US, Australia, New Zealand, Canada, and the United Kingdom. · karbonhq.com, 29 Sept 2026
Founded
2014 · karbonhq.com, 28 Sept 2026
Headquarters
San Francisco, California, United States · karbonhq.com, 28 Sept 2026
Integrations
The integrations directory lists connections including Xero, Xero Practice Manager, Zapier, and Calendly. · karbonhq.com, 29 Sept 2026
ISO status
Karbon says it has implemented an information security management system in accordance with ISO 27001 requirements but is not independently certified as ISO 27001 compliant. · karbonhq.com, 29 Sept 2026
Plan limits
Team and Business plans have finite limits on workflow statuses, templates, work types, teams, contact types, and placeholder job roles, while Enterprise lists unlimited usage limits. · karbonhq.com, 29 Sept 2026
Purpose
Karbon is a cloud practice management platform that streamlines work and communication for accounting firms. · karbonhq.com, 29 Sept 2026
Security
Karbon states its web application is SOC 2 Type 2 certified and uses TLS to encrypt data transmissions. · karbonhq.com, 29 Sept 2026
Support
The pricing page lists 24/7 support and 99.9% uptime for all plans. · karbonhq.com, 29 Sept 2026
Workflow
The platform supports workflow templates, task assignment, work scheduling, and dashboards. · karbonhq.com, 29 Sept 2026

Where Karbon stands on Freedom251

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