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Readeck vs Cauldron: catalog facts
Readeck	Cauldron
Free No paid tier is mentioned; you run it on your own server.	Free Free and open source under the Apache-2.0 licence; requires an Instapaper account.
Web, Self-hosted, Browser extension	Linux
Highlights, labels, favorites and full-text search across saved content Saves video transcripts as readable, searchable text	Native GTK interface for GNOME Reads saved Instapaper articles outside the browser
You need to host and maintain the server yourself Transcripts are only saved when the video provides one	Only works with Instapaper Linux only
Self-hosted, Browser extension	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it 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.