OSI-licensed open source
Open-source software solutions give organizations production-grade tools whose source code they can inspect, host and modify. For teams that want data control, no vendor lock-in or lower license cost, a strong open-source option now exists in almost every software category.
This page is a hub: one well-established open-source product per major need, from file collaboration and ERP to identity, analytics, observability and backend. Licenses were checked on each repository, including notes where a commercial edition exists alongside the open-source one.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Nextcloud | Self-hosted file sharing and collaboration | Free, open source (self-hosted); paid enterprise subscription - see vendor pricing | AGPL-3.0 |
| Odoo | All-in-one business apps | Free, open source Community (self-hosted); paid Enterprise and Online - see vendor pricing | LGPL-3.0 |
| ERPNext | Small and mid-size ERP | Free, open source (self-hosted) | GPL-3.0 |
| Keycloak | Identity and SSO | Free, open source (self-hosted) | Apache-2.0 |
| Metabase | Self-serve BI | Free, open source (self-hosted); paid cloud and enterprise - see vendor pricing | AGPL-3.0 |
| Grafana | Metrics and observability dashboards | Free, open source (self-hosted); paid Grafana Cloud - see vendor pricing | AGPL-3.0 |
| Supabase | Backend for apps on Postgres | Free, open source (self-hosted); hosted plans - see vendor pricing | Apache-2.0 |
Best for: Self-hosted file sharing and collaboration · Free, open source (self-hosted); paid enterprise subscription - see vendor pricing
Nextcloud is a self-hosted platform for file sync, sharing and collaboration. Its server is AGPLv3.
Best for: All-in-one business apps · Free, open source Community (self-hosted); paid Enterprise and Online - see vendor pricing
Odoo is a suite of business apps; the community edition repository is published under LGPLv3.
Best for: Small and mid-size ERP · Free, open source (self-hosted)
ERPNext is an open-source ERP built on the Frappe framework, GPLv3 licensed.
Best for: Identity and SSO · Free, open source (self-hosted)
Keycloak provides identity and access management with SSO, OIDC and SAML, Apache-2.0 licensed.
Best for: Self-serve BI · Free, open source (self-hosted); paid cloud and enterprise - see vendor pricing
Metabase is a business intelligence tool; the repo is AGPL except its enterprise directory under a commercial license.
Best for: Metrics and observability dashboards · Free, open source (self-hosted); paid Grafana Cloud - see vendor pricing
Grafana is a dashboarding and observability platform licensed under AGPLv3.
Best for: Backend for apps on Postgres · Free, open source (self-hosted); hosted plans - see vendor pricing
Supabase is an open-source Postgres development platform with auth, storage and real-time features, Apache-2.0 licensed.
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| If you need… | Start with |
|---|---|
| Replace a cloud drive | Nextcloud |
| Run the business on one suite | Odoo, ERPNext |
| Single sign-on | Keycloak |
| Dashboards for the team | Metabase |
| Infrastructure monitoring | Grafana |
| App backend | Supabase |
Quick answers to common questions
The source code is available under an OSI-approved license allowing use, modification and redistribution.
The software license is free but hosting, support and paid editions can cost money.
A model where the core is open source but some features are proprietary, as with Metabase and Odoo.
AGPL has network-use obligations if you modify and offer the software; unmodified internal use is typically simple, but review with legal.
List it on TechLogHub and we'll review it for this guide.
