Looking for a free or open-source alternative to Keygen? Keymaster is the closest direct swap — MIT-licensed source on GitHub, or a $49 one-time packaged install. Since you're already auditing what you pay Keygen every month, here are four more pay-once tools from the same catalog worth a look while you're at it — different jobs, same idea: buy the software once instead of renting it forever.
1. Keymaster — replaces Keygen
Ed25519-signed license keys your apps verify offline, seat limits, signed downloads & webhooks. $49 once vs Keygen's from $99/mo. Free on GitHub, or the packaged installer on Whop.
See Keymaster → · Source on GitHub
2. Ledgerlite Home — Local-first zero-based budgeting with CSV import, payee rules and net-worth tracking.
Replaces YNAB ($14.99/mo). $15 once. See Ledgerlite Home →
3. Ledgerly — Expenses, budgets, multi-currency, recurring templates and in-browser receipt OCR — no cloud, no per-seat fee.
Replaces Expensify ($5/user/mo). $29 once. See Ledgerly →
4. Lessonforge — Self-hosted LMS with modules, quizzes, progress tracking and PDF certificates — payments run through your own Stripe.
Replaces Teachable ($39+/mo). $49 once. See Lessonforge →
5. Linkguard — Crawl your whole site for broken links and redirect chains, with scheduled re-checks and diffs.
Replaces Ahrefs Site Audit ($99+/mo). $24 once. See Linkguard →
Why this list is worth bookmarking
Every app above is a one-time purchase with MIT-licensed source, no accounts with us and no telemetry. None of them are trying to be the next Keygen — they're trying to be the last subscription you pay for that specific job.
Try Keymaster — $49, once
Ed25519-signed license keys your apps verify offline, seat limits, signed downloads & webhooks.