







Sentry started life in 2008 as an unlicensed, 71-line Django plugin. The next year we began publishing it under BSD-3, and ten years later we switched to the Business Source License (BSL or BUSL). Last year we purchased Codecov, and a few months ago we published it under BSL/BUSL as well. That led to some vigorous debate because of our use of the term “Open Source” to describe Codecov, from which emerged this helpful suggestion from Adam Jacob, co-founder of Chef:
Building an Open Source Service
What does Open Source mean at Sentry? We're refreshing our commitment to open source and how we build Sentry.

Some startups are going ‘fair source’ to avoid the pitfalls of open source licensing | TechCrunch
New alternative category to 'closed source' could help companies monetize software in the open -- without going all-in on open source.

Licenses – Open Source Initiative
The content on this website, of which Opensource.org is the author, is licensed under a Creative Commons Attribution 4.0 International License.Opensource.org is not the author of any of the licenses reproduced on this site. Questions about the copyright in a license should be directed to the license steward. Read our Privacy Policy
Everything an open source maintainer might need to know about open source licensing | Ben Balter
There's lots of internet lore around open source licensing. An attorney and open source developer answers the most common questions.

The Single-Vendor Commercial Open Source Business Model
Dirk Riehle Research, SAP Labs LLC Updated 2010-11-09: Renamed “commercial open source” to “single-vendor (commercial) open source” to be clear about the difference to distr…

The Great Open Source Shake-up
The past year and a half has seen a number of open source and open source-ish companies like Elastic, Confluent, and MongoDB change licenses on certain products, moving away from traditional open s…

Sorting out the Ethical Licensing Mess
Software developers who give the world, for free, usage rights to the code they write often use open source licenses to make this gift legally explicit. These free usage rights (and then some) are …

One Startup's Heretical Plan to Turn Open Source Code Into Cash
With a new kind of license, open sourcers are trying to strike a balance between getting paid and preserving their values.

Business Source License 1.1 | MariaDB
Details of MariaDB’s Business Source License (BSL) 1.1.

Business Source License 1.1 | MariaDB
Details of MariaDB’s Business Source License (BSL) 1.1.

Katerina Marchán (@zkat@toot.cat)
Open source maintainers of major projects (hi) are not ready to accept and talk about how the cultural insistence on permissive licensing is just straight up labor exploitation taking advantage of our addiction to popularity (also hi). We’re doing this to ourselves too, you know.
Revisiting the Open Source Business Model
In the past few years, many companies have come to me asking for help drafting a “new open source license.” As a rule, drafting a new open source software license is not a good idea, s…

Open Source Beyond Licensing - The Evolution Ahead
Boris Mann's digital garden and personal site.
Running ads with Sentry
We’re excited to announce our first partner in our Ethical Advertising campaign: Sentry. Sentry was a natural first partner, both because they have a long history supporting and contributing to the open source community, and because they also strive to support open source while building a sustain...

Please Help Keep our Language Precise: Single-Vendor Open Source is Neo-Proprietary Source, not Closed Source
When the Open Source Initiative defined open source, it focused only on the license, and ignored the process. Smart entrepreneurs quickly discovered that they could provide to the world their produ…
