30 licenses
Licenses
Every license used by companies in the index, from Apache-2.0 and MIT to source-available licenses like BUSL and SSPL, with how many companies use each.
Open source
OSI-approved licenses: anyone may use, change and share the code.
| License | About | Companies |
|---|---|---|
| Apache-2.0 | A permissive license: use, change and redistribute the code, keep the notices, with an explicit patent grant. | 143 |
| MIT | A short permissive license: do almost anything with the code as long as the copyright notice stays. | 105 |
| AGPL-3.0 | A strong copyleft license: modified versions, including ones offered over a network, must publish their source under the AGPL. | 72 |
| GPL-3.0 | A copyleft license: distributed modifications must stay under the GPL, with source available. | 25 |
| MPL-2.0 | A file-level copyleft license: modified MPL files stay open, the rest of a project can use any license. | 10 |
| GPL-2.0 | A copyleft license: distributed modifications must stay under the GPL, with source available. | 9 |
| BSD-3-Clause | A permissive license like MIT, which also bars using the authors’ names to promote derived products. | 8 |
| LGPL-3.0 | A weak copyleft license: changes to the library stay LGPL, but software under any license can link to it. | 3 |
| BSD-2-Clause | A permissive license like MIT: redistribute freely, keep the copyright notice. | 2 |
| GPL-2.0-or-later | A copyleft license: distributed modifications must stay under GPL version 2 or any later version. | 2 |
| LGPL-2.1 | A weak copyleft license: changes to the library stay LGPL, but software under any license can link to it. | 2 |
| EPL-2.0 | A weak copyleft license from the Eclipse Foundation: changed EPL files stay open, linked code can use other licenses. | 1 |
| OSL-3.0 | An OSI-approved open-source license. | 1 |
| PostgreSQL | An OSI-approved open-source license. | 1 |
| Zlib | An OSI-approved open-source license. | 1 |
Source available and other
Not OSI-approved: mostly licenses where the code is public but some uses are restricted, such as running it as a competing service.
| License | About | Companies |
|---|---|---|
| BUSL-1.1 | The Business Source License: the source is public but production use is limited, and each version converts to an open-source license after a set date. | 16 |
| Elastic-2.0 | The Elastic License 2.0: source available, but offering the software as a managed service or bypassing license keys is not allowed. | 6 |
| FSL-1.1 | The Functional Source License: source available with a non-compete clause that lapses after two years, when each release becomes Apache-2.0 or MIT. | 4 |
| SSPL-1.0 | The Server Side Public License: source available; offering the software as a service requires publishing the source of the whole service stack. | 4 |
| Sustainable Use License | A source-available license (introduced by n8n) that limits use to internal business purposes. | 2 |
| Any Source Available License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| CC-BY-SA-4.0 | A Creative Commons share-alike license, written for content rather than code, so it isn’t on the OSI list. | 1 |
| CockroachDB Software License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| Dify Open Source License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| LobeHub Community License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| Open WebUI License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| PolyForm-Shield-1.0.0 | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| Remotion License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| ScyllaDB Source Available License | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |
| tldraw license | A source-available license: the code is public, but the license restricts some uses, so it isn’t OSI-approved. | 1 |