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64Gram vs Mercurygram: catalog facts
64Gram	Mercurygram
Free Free and open source under the GPL-3.0 with an OpenSSL exception.	Free Free and open source under the GPL-3.0-or-later licence.
Windows	Linux, Android
Follows recent Telegram Desktop versions Adds enhancements not in the official client	Based on the official Telegram Desktop code Privacy-focused changes on top of upstream
Unofficial client not endorsed by Telegram Release notes are often minimal	Still relies on Telegram's servers and account system Small project compared with the official client
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-with-openssl-exception	License: GPL-3.0-or-later
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.