OSS Licensing in 2025: A Startup's Legal Survival Guide

You've built something great. Your MVP is humming along with Node.js, PostgreSQL, and a dozen npm packages nobody remembers installing. Now a lawyer asks about your OSS license compliance, and you realize you have no idea what's actually in your dependency tree.

This is the moment most startups panic. It doesn't have to be.

OSS licensing in 2025 isn't more complex than it was five years ago—but it matters more. Investors scrutinize it during due diligence. Enterprise customers demand compliance audits. And courts are increasingly willing to enforce license terms. The good news: you can get this right without becoming a licensing expert.

Know What You're Actually Using

First step: stop guessing. Run an audit.

bashCopy
npm ls --all

That shows your entire dependency tree. Do the same for your other package managers:

bashCopy
pip list

bashCopy
grep -r 'import' src/ | head -20

Now pull the license for each top-level dependency. Most projects include a LICENSE file in their repo. For npm packages specifically:

bashCopy
npm view package-name license

You need a complete inventory. Tools like FOSSA, Black Duck, or WhiteSource automate this, but even a spreadsheet works if your stack is small. The point: you must know what you're shipping.

The Big Three Licenses (and Why They Matter)

MIT/Apache 2.0/BSD: These are permissive. Use them freely, modify them, distribute them. Your only obligation is to include the original license text. You can ship proprietary software on top of these without restriction.

GPL (v2/v3): This is reciprocal. If you distribute code linked to GPL code, your code becomes GPL too. That's the trade-off. If your startup's core IP is proprietary, GPL dependencies are a red flag—especially GPL v3, which has stricter terms around hardware restrictions.

AGPL: Think GPL's aggressive cousin. Even if users access your software over a network without downloading it, the reciprocal requirement applies. This affects SaaS startups especially. If you use AGPL code, your entire service arguably becomes AGPL.

The practical rule: permissive licenses are startup-friendly. Reciprocal licenses require careful architecture decisions.

Build Your Policy Now, Not Later

Wait until funding or acquisition to figure this out, and you'll either kill the deal or waste months in legal review.

Write a simple policy:

codeCopy
✓ Permitted: MIT, Apache 2.0, BSD, ISC
✓ Review case-by-case: LGPL, Mozilla Public License
✗ Prohibited: GPL v2/v3, AGPL (for core product)

Make this part of code review. When a teammate wants to add a new dependency, they should check the license first. This takes seconds and prevents downstream headaches.

If you use LavaPi for infrastructure or tooling, we handle license compliance on our side—but you're still responsible for your own dependencies. That responsibility doesn't transfer.

When GPL Makes Sense

GPL isn't poison. Some startups intentionally choose GPL dependencies:

• If your product is open source too, GPL is fine.
• If you're building developer tools or infrastructure where the GPL ecosystem is mature (like many Linux utilities), the benefits often outweigh the restrictions.
• If you use GPL code as a standalone service—not linked into your proprietary binary—the reciprocal requirement doesn't always apply.

But be intentional. Don't inherit GPL by accident.

Your Shipping Checklist

Before production:

1. Run license audit on all dependencies (automated tool, not manual)
2. Document what you found
3. Cross-check against your policy
4. Add LICENSES.txt or ATTRIBUTION file to your repo listing third-party software
5. Include full license texts in your distribution

That's it. Not onerous. But it matters.

The startups that survive acquisition aren't the ones that hope licensing magically resolves itself. They're the ones who know exactly what they shipped and why it's legal to do so. Do the audit now, write the policy, move on. Your future self will thank you.