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AlterSend vs RelayPony: catalog facts
AlterSend	RelayPony
Free The client is open source under Apache-2.0; no paid tier is mentioned on the homepage.	Free Free with no accounts or in-app purchases, open source under Apache-2.0.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS
Files go device to device with no copy left on a server Recipients can download from a browser link without installing anything	Direct device-to-device transfer with no server End-to-end encryption using age
Both devices must be online at the same time for a direct transfer Transfer speed depends on the sender's own connection	Both devices need to be on the same network or within Wi-Fi Direct range Young project with a small user base
Downloadable app, Web application	Downloadable app
Open source	Open source
License: Apache-2.0	License: Apache-2.0
No account needed	No account needed
Not stated if it works offline	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.