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AlterSend vs FilePizza: catalog facts
AlterSend	FilePizza
Free The client is open source under Apache-2.0; no paid tier is mentioned on the homepage.	Free Free and open source.
Windows, macOS, Linux, Android, iOS, Web	Web
Files go device to device with no copy left on a server Recipients can download from a browser link without installing anything	Direct browser-to-browser transfer with no server storage No install or account needed
Both devices must be online at the same time for a direct transfer Transfer speed depends on the sender's own connection	Sender must keep the page open during the transfer Both people need to be online at the same time
Downloadable app, Web application	Web application
Open source	Open source
License: Apache-2.0	License: BSD-3-Clause
No account needed	No 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 September 23, 2026

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