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

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