Open source risk covers the legal, security, and strategic downsides of relying on or distributing open-source software in a commercial product.

How it works

Risks split into license compliance and operational dependency. Permissive licenses (MIT, Apache) usually allow proprietary use with attribution. Copyleft licenses (GPL, AGPL) may require releasing derivative source if you distribute combined works — problematic for closed SaaS edge cases depending on linking and deployment architecture.

Companies maintain SBOMs (software bills of materials), run automated license scans, and adopt policies for approving new dependencies. Open core business models open-source a base product while selling enterprise features — community fork risk and cloud competition (AWS hosting your OSS) are strategic concerns, not just legal ones.

Acquirers and enterprise customers increasingly require OSS disclosure in security questionnaires.

Why it matters

• Founders: Implement license review before launch, not before IPO. Relicensing a popular OSS project under a stricter license can force emergency rewrites.
• Investors: Diligence flags GPL in mobile apps, unvetted vendor code, and startups whose moat is entirely repackaged OSS without differentiation.

Common mistake

Assuming “free to use” means “free of obligations.” Every OSS license has conditions; ignoring NOTICE files and patent grants creates latent liability.

Related ideas

See also legal diligence, copyleft licenses, open core model, and SBOM practices.