About XTermium.
XTermium is made by Sotirios Roussis. Here is who makes it, how it is paid for, the licence it comes under, and where to send bugs, security reports and questions.
Who makes it.
Sotirios Roussis writes XTermium and holds its copyright; on GitHub, the profile is xtonousou. The app’s source and its Scoop bucket live under the xtermium organisation on GitHub, where every release is published with its sha256 checksums.
The logo, its animations, the colours and the design system are by dehawk.
How it is paid for.
The app is free: every connection type, on every OS, on any number of machines. Pro is the hosted part, sync between your computers and Terminal Co-op, which have running costs: €2.99 a month or €29.99 a year, excluding VAT. Its checkout is in test mode for now and charges nothing.
Creem, the merchant of record, takes Pro’s payments and adds the VAT. Pricing.
Licence and trademark.
XTermium is licensed under the Apache License 2.0: you may use, change, rename and share it, commercially or not. Every copy and fork must keep LICENSE and the credit in NOTICE. Third-party parts keep their own licences, quoted in THIRD-PARTY-NOTICES.txt, which the installers carry.
The sync server and the hosted sync service are proprietary; the app talks to them through an open API, described in docs/sync.md. “xtermium” and its logo are trademarks of the author, so forks must use another name.
Bugs, security and support.
Report what broke in the open, where it can be fixed, and keep security problems private. Here is where each one goes.
Bugs and ideas
Open an issue on GitHub with what you did and what you saw. Settings › Troubleshoot makes a bundle to attach, with your names and addresses taken out.
Open an issue on GitHubSecurity problems
Write to abuse@xtermium.com, or open a private advisory on GitHub. The rules for testing are in the terms.
Report privately on GitHubSupport
Write to support@xtermium.com. Pro gets priority email; Free has the community on GitHub.
Read the docs on the GitHub wiki
No cookies on this site.
This website sets no cookies and stores nothing in your browser to recognise you. Visits are counted with Cloudflare Web Analytics, which works without cookies, so there is no consent banner. The privacy policy says what the app and the sync server keep.
Read next.
SSH client
SSH sessions, SFTP, jump hosts and tunnels, in tabs.
Read more about SSH clientRemote desktop
RDP, VNC, BMC consoles, WinRM and serial beside your terminals.
Read more about Remote desktopAI agents
A local MCP server and agent tabs that never see a password.
Read more about AI agentsCredentials
Shared and saved logins, encrypted on disk, kept out of exports.
Read more about CredentialsScreens
Every capture of the running app, with demo data.
See the screens about Screens
Get it for Windows, Linux or macOS.
Free and open source. One command fetches the latest build from GitHub, checks its sha256 and installs it; read install.ps1 or install.sh first. Every file and its checksum, Scoop included, are under Downloads, and the .msi, .exe, .zip, .deb, .rpm, AppImage and .dmg are in the latest release on GitHub. The macOS app is not signed by Apple yet: how to open it the first time.
WindowsWindows 10 and 11
irm https://xtermium.com/install.ps1 | iexLinuxx64: .deb, .rpm or AppImage
curl -fsSL https://xtermium.com/install.sh | shmacOSApple silicon and Intel: one universal .dmg
curl -fsSL https://xtermium.com/install.sh | sh