RSA-signed license keys, anti-tamper SDKs, a white-label customer portal, recurring billing and anti-piracy — everything you need to sell and secure your app, built developer-first.
Free tier forever · C#, Node & Python SDKs · Your customers never see “Siglock”.
You run the platform. Vendors embed the SDK. Their customers just enter a key — and the app unlocks, verified by an un-spoofable signed response.
Spin up an application, define products and features, then generate signed license keys — by hand, by API, or automatically from a Stripe sale.
Add the C#, Node or Python SDK to your app. On launch it verifies the key, binds the device (HWID) and unlocks features — checking the signature so nothing can be faked.
Your customers activate, manage devices and download builds from a portal under your brand. You watch activity, ban abuse and bill recurringly.
A complete licensing stack: cryptographically signed, fully white-label, and built for selling, not just gating.
Every key is RSA-signed and every API response carries a signature your SDK verifies — emulators and fake servers can’t spoof it.
Custom domain, your logo, colours, emails and copy. Your customers never see the word “Siglock”.
C#, Node and Python clients handle verify, login, downloads, variables and offline cache out of the box.
Stripe subscriptions that auto-extend licenses, with dunning on failed payments and 7/1-day expiry reminders.
A signed, device-bound grace period lets licensed apps keep working without a connection — tamper-proof.
HWID/IP/country blacklists plus license-sharing alerts when one key logs in from too many places.
Credit-based reseller sub-accounts, plus team members with roles and per-app access — and per-user 2FA.
Proxy license-gated calls to your own endpoints, mint keys via the Seller API, and store server-side variables.
Import your existing keys and users from another provider or a Siglock app — keys keep working, logins preserved.
// C# — verify a license when your app starts var siglock = new SiglockClient( appId: "your_app_id", apiUrl: "https://panel.yourbrand.com"); var result = await siglock.VerifyAsync(licenseKey); if (result.Valid) Unlock(result.Features); // signature checked ✓ else Environment.Exit(0); // not licensed
No crypto to wire up, no servers to babysit. The SDK builds the nonce, timestamp and HWID, verifies the signed response, and hands you the result.
Start free, upgrade when you grow. Cheaper than building it yourself — and far cheaper than enterprise licensing tools.
Ship your first licensed app, no card required.
Free forever — no card
Shows a small “Powered by Siglock”.
Start freeWhite-label everything and bill on a recurring basis.
or $7/mo billed yearly
Unlimited scale with resellers, automation and anti-piracy.
or $24/mo billed yearly
All prices in USD. Cancel anytime. Need self-hosting or a tailored plan? Talk to us.
Siglock is a complete, developer-first licensing platform — not just a key checker. You get cryptographically signed responses, a fully white-label customer portal, recurring billing, offline activation, resellers and anti-piracy in one place — and you can import your existing keys when you switch.
No. On the Pro plan and up, the customer portal, emails and even the domain are entirely your brand. Siglock stays invisible to your buyers.
C#, Node.js and Python today, each verifying the signed response and exposing features, downloads, variables and an offline cache. C++, Unity and Go are on the roadmap.
Yes — import your keys and user accounts. Keys keep working and logins are preserved; we re-sign them for your new app automatically.
Yes, free forever — one application and up to 50 licensed users, with the full signing & SDK stack. No credit card to start.
No — Siglock validates the license and hands back your download link (signed for authenticity). You stay in control of your builds.
Create an account, add your app and ship a signed key in minutes.
Start free — no card