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copyparty vs Transfer: catalog facts
copyparty	Transfer
Free Free and open source.	Paid US$19.99 with a 3-day free trial.
Self-hosted	macOS
Runs from a single portable file Resumable uploads with deduplication	TFTP, SFTP, FTP, HTTP and HTTPS in one app Works immediately after launch
You host and secure the server yourself Many features means a lot of configuration to learn	macOS only, requires macOS 13.5 or later Short 3-day trial before purchase
Self-hosted	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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