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Ferdium vs IGdm: catalog facts
Ferdium	IGdm
Free Free and open source under Apache 2.0. Unlike Franz, the project states it does not…	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Windows
Hundreds of services supported, with workspaces to group them No paid account or usage restrictions, unlike the Franz it forked from	Dedicated desktop window for Instagram DMs Open source under the MIT licence
Each service is a web view, so memory use grows quickly with many services Service integrations break when a provider changes its web app	Unofficial client not affiliated with Instagram Covers direct messages only, not the full Instagram feed
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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