Licensing

Lingua is a commercial source-available product. The repository atgithub.com/johnny4young/linguais published under the Lingua Commercial License — see the LICENSE file in the repository root for the full text.

Tier scope

Free

3 open tabs at a time. Up to 5 saved snippets. JavaScript, TypeScript, Python, and Ruby runners. Monaco editor with syntax highlighting and the keyboard-shortcut editor. No license key required — Free is the default install.

Monthly

Everything in Free, plus unlimited tabs and snippets; the Go and Rust runners; TypeScript, Python, and SQL notebooks; local-first bring-your-own-key AI; persistent execution history; and saved utility workflows. Monthly is a $5/month subscription that includes every update while it stays active. Cancel anytime to stop the next renewal. Single-shot utilities remain available in Free.

Pro

Everything in Monthly, forever. The $59 one-time fee includes 12 months of updates and priority email support, with no recurring bill. Renew only if you want another update window; your paid entitlement never expires.

Team

Everything in Pro, plus seat management and invoicing. $3 per seat per month.

Education

Free Pro for one year, renewable. Open Lingua, go to Settings → License → Educational license, and enter your school email. We accept any .edu domain plus.ac.uk, .edu.mx, .edu.au, .edu.ca,.edu.br, and .ac.in. You'll get a confirmation email with a magic link; once clicked, the token arrives by email and pastes itself into the app. Renew from the same screen at the end of the year with the same email.

Trial

14 days of Pro features, no credit card required. Open Lingua, go to Settings → License → Try Lingua Pro free for 14 days, enter your email, and click Start Trial. The token activates automatically — no manual paste. One trial per email and per device.

How license keys work

Paid tiers issue a signed token — Ed25519, verified offline against a public key embedded in the desktop binary. Lingua does not phone home to validate. The token is bound to a small set of devices (currently three for Pro). When you buy a new machine, deactivate the old one from Settings → License — the slot frees up immediately.

Source availability

The source for the desktop app is published for evaluation, contributor review, and transparency about what runs on your machine. You may build the app from source for personal non-commercial use. Production or commercial use requires a valid paid tier license. You may not redistribute Pro license tokens or the licensing server endpoints.

The license is intentionally source-available rather than open-source: it gives you the right to read, build, and audit, without giving away the right to redistribute commercial features.

Refund and transfer

Refunds within 14 days of purchase, no questions asked. License transfers between machines you own are unlimited. Transferring a token to a different person is not permitted — buy a Team seat instead.

Contact

Anything licensing or education-related: [email protected].