# Commercial Support & Services
tui-lipan is free and open source under the **Mozilla Public License 2.0**
(see [LICENSE](LICENSE)). For the overwhelming majority of users, that is all
you need - **including closed-source, proprietary, and commercial applications**.
This page is about the paid offerings around the framework, not a different
license for the framework itself.
## You do NOT need to pay for anything to:
- Build closed-source or commercial **applications** on top of tui-lipan.
- Ship those applications without publishing your own source code.
- Write your own widgets, components, and UI by composing tui-lipan primitives
and keep that code private.
MPL-2.0 is **file-level copyleft**. It only governs tui-lipan's *own* source
files. Your application code lives in your own files and stays entirely yours -
you never owe anyone your app's source.
The only thing MPL-2.0 asks: if you modify tui-lipan's *own* source files, those
specific modified files stay under MPL-2.0. You can still ship them inside a
closed commercial product - you just keep that handful of files open. In
practice almost no application ever needs to do this.
## What we offer commercially
For teams that want more than the open-source project gives on its own:
- **Priority support** - a direct line for bugs, upgrades, and integration
questions, with agreed response times.
- **Custom development** - new widgets, features, or platform work built to your
requirements.
- **Sponsored features & roadmap influence** - fund the work you need next and
help shape what ships.
- **Integration & architecture help** - hands-on assistance designing your TUI,
migrating from another framework, or optimizing performance.
## Commercial licensing (rare cases)
A small number of organizations have internal policies that forbid **any**
copyleft dependency, even file-level MPL-2.0. If that's you - and only then - a
commercial license placing tui-lipan and `tui-lipan-macro` under non-copyleft
terms is available. Most teams do **not** need this; MPL-2.0 already permits
closed, proprietary, commercial apps.
**Scope note:** contributions are accepted under inbound = outbound with no
CLA, so a commercial license covers the code whose copyright is held by the
project author. Any third-party contributions remain under MPL-2.0 unless
their authors agree otherwise; where that matters, the engagement is scoped
accordingly. (Today the codebase is single-author, so this is currently a
non-issue.)
## Get in touch
Email **<contact@tui-lipan.dev>** with a short description of your use case
(what you're building, distribution model, team size, and what you need).
Pricing is tailored to the engagement.
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*This document is a plain-language summary, not legal advice. The binding terms
are the MPL-2.0 [LICENSE](LICENSE) and any commercial agreement you sign.*