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AirDash vs AlterSend: catalog facts
AirDash	AlterSend
Free Free and open source under the MIT licence.	Free The client is open source under Apache-2.0; no paid tier is mentioned on the homepage.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android, iOS, Web
Works across all major desktop and mobile platforms No file size limit	Files go device to device with no copy left on a server Recipients can download from a browser link without installing anything
Pairing depends on Firebase services Includes analytics and error tracking	Both devices must be online at the same time for a direct transfer Transfer speed depends on the sender's own connection
Downloadable app	Downloadable app, Web application
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	No account needed
Needs internet	Not stated if it works offline
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.