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Spectrum 2 vs mautrix-telegram: catalog facts
Spectrum 2	mautrix-telegram
Free Free and open source.	Free Free to run on your own server; the project accepts sponsorships.
Self-hosted	Self-hosted
Bridges users on different IM networks Runs on your own server	Puppeting bridge, so your own Telegram account appears on the Matrix side Actively maintained with frequent commits
Server software that needs setup and an existing messaging server Little end-user documentation on the homepage	Requires your own Matrix homeserver and some setup Needs a Telegram account
Self-hosted	Self-hosted
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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