Melty Privacy Policy

Last updated: October 12, 2026

This Privacy Policy explains what information Stella Montis Inc. ("Stella Montis," "Melty," "we," "us," or "our") collects when you use Melty, including the website at melty.gg, the Melty desktop app, and the tools Melty offers creators and their coding agents (together, the "Services"), and how we use and share it.

1. Information we collect

Your account. When you sign up, we collect your email address and, if you sign in with Google, your name and profile picture from Google. We also keep the profile name and picture you choose, and the sign-in tokens the website and the Melty app use to keep you signed in.

Your activity on Melty. We keep the mashups you add to your library, what you're playing and when you're online (so your friends can see it), your friends, friend requests and the players you block, and reports you send about a mashup.

What you publish. If you publish a mashup, we keep its files, name, pictures and description, its releases, and the GitHub repository you connect. If you connect a coding agent, we keep a hashed copy of its token, not the token itself. We also keep a record of which Melty creator tools your agent uses, when, and whether each one worked, for 60 days, to make those tools better. This record doesn't include your files, text or links.

Install and play reports. When you install, update or play a mashup, the Melty app tells us whether it worked, with short error details and your version of the game. If a mashup fails to install or start, or its game crashes, the app also sends the end of the logs written meanwhile (the mashup's own, its loaders' and the game's), after removing your Windows account name, your PC's name, your Minecraft account name, email and network addresses, and any tokens, keys or passwords. We use these to fix problems, and the mashup's creator can see them, so they can fix their mashup.

Multiplayer. When you host a game, we keep your game's network address (IP address and port) and who is in the game, so players who join can connect to you. Your address is shared only with the players in that game.

Your PC. To show what you can play, the Melty app looks for the games installed on your PC and reads their versions. When a mashup uses your own copy of a game, the app looks for that copy in your folders and drives. This is done on your PC: the list of your games and the files of your own copies aren't uploaded to us.

Your Minecraft sign-in. When you sign in to Minecraft for a mashup, the Melty app keeps that sign-in on your PC, encrypted by Windows for your Windows account, so no other Minecraft mashup asks you again. It is never sent to us: only Minecraft's own launcher uses it, with Microsoft, to sign you in. You can end it at any time from your Microsoft account, by removing Prism Launcher's access to it; removing the Melty app's data from your PC deletes the copy the app keeps.

Crash and error reports. The Melty app and website send us reports when something goes wrong, such as error messages, the app version and technical details about your device and the problem. We remove passwords, tokens, cookies and email addresses from these reports before they're sent.

How the app is used, and when it goes wrong. For some players in their first few days, the Melty app records how its window is used: the pages opened, what's clicked, and a replay of the Melty window. For some other players, it records a replay of the Melty window only when something goes wrong, such as an install that fails, a game that stops with an error, or an error on the page. Anything you type is hidden, and nothing outside the Melty window is recorded, including your games. We use this to find what's confusing or broken and fix it.

Website visits. When you visit melty.gg, we use first-party cookies to keep you signed in, to remember your settings, and to count visits, downloads and sign-ups. Those cookies hold a random visitor ID and the page or link that brought you, and last 180 days. We don't sell this or use it for advertising.

Messages to us. If you email us, we keep the message and your contact details to reply.

2. How we use information

We use information to:

run the Services: sign you in, set up and start mashups, show your library, friends and who's playing, and connect multiplayer games;
let creators publish, update and fix their mashups;
keep Melty and its players safe: review reports, take down mashups that break our Terms, and prevent abuse;
fix bugs and improve the Services;
understand how people use Melty;
answer your messages; and
meet our legal obligations and enforce our Terms.

We don't sell your personal information, and we don't use it for advertising.

Other people on Melty can see your profile name and picture, the mashups you publish, and what you're playing. Your friends can see when you're online. Players in a game you host receive your game's network address. A mashup's creator, and the coding agent they connect, can see install and play reports for their mashup and the logs sent with them, but not who sent them.

Service providers that run parts of Melty for us, such as hosting, storage, databases, sign-in, email, error reporting and product analytics, process information on our behalf and only to provide their service.

Other services you use with Melty, such as Google when you sign in with Google, or Discord if you let the app show what you're playing there, receive information under their own privacy policies.

We may also share information when the law requires it, when we believe it's needed to protect players, Melty or the public, or as part of a merger, acquisition, financing or sale of assets.

4. How long we keep it

We keep information for as long as your account is open and as long as we need it to provide the Services. Error reports and recordings of how the app is used are kept for a limited time, and logs sent with install and play reports for 30 days. After you delete your account, we delete or anonymise your information, except what we need to keep for legal obligations, disputes, safety or preventing abuse.

5. Security

We use reasonable safeguards to protect your information: connections are encrypted, tokens are stored hashed, and access is limited to the people and providers who need it. No system is completely secure, so we can't promise absolute security.

6. Children

Melty isn't directed at children under 13, and we don't knowingly collect personal information from children under 13 without a parent's consent. If you believe a child under 13 has given us personal information, contact us and we'll delete it.

7. Your choices and rights

You can change your profile name and picture, unfriend or block players, and stop the app from showing what you're playing on Discord. You can stop using Melty and uninstall the app at any time.

You can ask us for a copy of your information, to correct it, or to delete your account by emailing david@melty.gg. Depending on where you live, you may have other rights over your information, and you can contact us to use them.

8. Changes

We may update this Privacy Policy. If a change is significant, we'll tell you, for example on melty.gg or in the app, and update the date at the top.

9. Contact

Questions about this Privacy Policy or your information: david@melty.gg, Stella Montis Inc.