Instapaper is a good alternative.
Readwise Reader is a strong paid alternative, especially for heavy users and those wanting integration with tools like Obsidian.
Raindrop.io is a useful alternative, including its free tier and permanent copy feature.
Matter is another alternative that has been tried.
Self-hosted options like Wallabag, Linkding, Linkwarden, Karakeep, Omnivore, and Shiori exist.
Obsidian Web Clipper can save articles as markdown locally.
Other less common or custom solutions include Feedly, Histre, Walden Pond (defunct print service), Lighthouse, Full Sort, DoubleMemory (Apple ecosystem), Ulry.app, WordPress plugins, simple text files/spreadsheets, or custom scripts.
(Full summary here: https://extraakt.com/extraakts/mozilla-pocket-shutdown-discu...