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RelayPony vs AlterSend: catalog facts
RelayPony	AlterSend
Free Free with no accounts or in-app purchases, open source under Apache-2.0.	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
Direct device-to-device transfer with no server End-to-end encryption using age	Files go device to device with no copy left on a server Recipients can download from a browser link without installing anything
Both devices need to be on the same network or within Wi-Fi Direct range Young project with a small user base	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: Apache-2.0	License: Apache-2.0
No account needed	No account needed
Works offline	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.