You built something worth paying for, and now you need to stop it from being copied endlessly. Good news: you do not need an expensive enterprise platform to license software well. You need signed validation, device binding, and a clean SDK — and you can get all three for free.
This guide covers what actually matters, so you do not overpay for features you will not use.
Features that actually matter
Ignore long feature lists and insist on these four:
- Signed validation. Responses must be cryptographically signed so a fake local server cannot forge a "valid" reply. This is non-negotiable — it is the whole point.
- Device binding (node-locking). Limit how many machines a key activates on.
- Offline license files. For customers with no internet, verify a signed file locally.
- A real SDK plus REST API. So integration takes minutes, in any language.
Nice-to-haves that many indie developers do not need on day one: integrated billing, advanced analytics, and enterprise SSO. Do not pay for those until you do.
Common options
- Keygen — a mature, fair-source licensing and distribution API with a self-host option; free Dev tier is capped and commercial use moves to paid tiers.
- Cryptolens — cloud licensing with integrated payments and analytics; multi-language SDKs.
- LicenseSpring — a license-as-a-service aimed at software vendors.
- Licers — a free, hosted platform with Ed25519 signed validation, device binding, floating and offline licensing, and a Python SDK.
How to add signed licensing for free
With Licers you can ship real, tamper-proof licensing in about five minutes:
pip install pylicensifyfrom pylicensify import LicenseClient
client = LicenseClient(public_key="YOUR_PUBLIC_KEY")
if client.validate("PY-XXXXXXXXXXXXXXXX"):
unlock_app()The response is Ed25519-signed and verified locally against your public key, so a forged reply is impossible. Add device limits, floating seats, or an offline license file whenever you need them.
Frequently asked questions
Do I need to pay for good licensing?
No. The security-critical pieces — signed validation, device binding, offline files — are available for free. Pay for billing or analytics only when you actually need them.
What is the most important feature?
Signed validation. Everything else is secondary to responses a fake server cannot forge.
Can I start free and scale later?
Yes. A licensing integration is thin (a validate call plus a public key), so you can start free and change tools later with minimal effort.
Start licensing your software today — create a free account and read the integration guide.