Start using Cerb for free with no time limit
Terms: You can use your free 3-seat Cerb license forever at no cost. You can optionally decide to upgrade to a Pro license at any time and keep everything you've already set up. You're entitled to one free renewal of this license every 12 months, at which point you can upgrade to the latest version.
  • Installed on your own hardware (web, database, mail, storage, cache)
  • You’re responsible for installation, upgrades, scaling, monitoring, security, and backups
  • Requires PHP 5.5+ and MySQL 5.6+
  • Ideal for regulatory compliance (HIPAA, Safe Harbor, Sarbanes-Oxley)
  • Your first 3 seats are free with full functionality and no time limit
  • Optionally migrate to Cerb Cloud at any time


$0 for 3 seats
Full functionality, with limitations:
  • Low-priority email support
  • No software updates
  • One free renewal per 12 months


$25/month per seat (billed annually)
Full functionality, plus:
  • 1 year of software updates
  • 1 year of priority support by email and phone
  • Hands-on assistance
  • Priority bug fixes and feature requests
  • 10% discount for timely renewals
  • Academic, non-profit, and volume discounts

Frequently asked questions:

How do I install Cerb on my own hardware?

Read the installation instructions to get started.

What are seats?

Seats determine the maximum number of workers who can use Cerb at the same time.

For example, a team of 30 workers who are evenly split into three, non-overlapping shifts (morning, day, night) would only require 10 seats. That’s the highest number of workers who would ever be logged in at the same time.

You aren’t paying per worker account, so there isn’t a penalty for inviting everyone to participate: full-time staff, part-time contributors, busy executives, interns, temps, contractors, partners, and volunteers.

What is a Starter license?

A starter license provides 3 seats at no cost. The license is valid for the latest version of Cerb at the time it is created. The right to run that version of the software will never expire.

Starter licenses don’t provide access to priority support or ongoing software updates. They are eligible for a single “get current” upgrade once per 12 month period. Aside from that, they have no feature-related limitations.

Registered charities and qualifying open source projects may be eligible for a higher seat limit and ongoing software updates at no cost.

Do you provide a renewal discount for existing licenses?

Yes! We automatically add a 10% “timely renewal” discount to your invoice for any existing Pro licenses that have not been expired for more than 30 days.

Do you provide an academic discount?

Yes. We offer a 20% discount in support of academic institutions.

To qualify for an academic discount, institutions must be accredited by an agency recognized by the U.S. Department of Education (or their own national equivalent). All publicly funded K-12 and preschools automatically qualify.

What qualifies a charity or non-profit organization for a free license?

To receive a free Cerb license with ongoing software updates and more than 3 seats, a charity or non-profit must have a charter that seeks to improve the public good and be registered as a 501(c)(3) organization (or their own national equivalent). The organization should be primarily funded through public donations or grants, and such contributions should be tax deductible by the donors.

What qualifies an open source project for a free license?

To receive a free Cerb license with ongoing software updates and more than 3 seats, an open source project must have a website explaining the purpose of the project, all source code available in a public repository like GitHub, and a self-deployed option with no licensing costs.

An open source license should only be used for that purpose, and not mixed with other commercial activity.

Do you provide a volume discount for standalone Cerb licenses?

Yes! Volume discounts are available for Academic, Commercial, and Government licenses with more than 25 seats.

Academic Volume Discount
Seats Cost/Seat
1-25 $240
26-50 $231
51-75 $222
76-100 $213
101-125 $204
126-150 $195
151-175 $186
176-200 $177
201-225 $168
226-250 $159
251-275 $150
276-300+ $141
Commercial/Gov Volume Discount
Seats Cost/Seat
1-25 $300
26-50 $289
51-75 $278
76-100 $266
101-125 $255
126-150 $244
151-175 $233
176-200 $221
201-225 $210
226-250 $199
251-275 $188
276-300+ $176

If you have multiple non-expired Cerb licenses on your account, the sum of all seats of the same license type determines your volume discount. This is particularly beneficial for large companies with many subsidiaries using independent instances of Cerb, and outsourced support companies who use distinct Cerb environments for each client to provide their services.