spongeComparison
Sponge vs Instapaper for AI agent research
Instapaper’s export is a CSV of links without article text, highlights, or notes. Sponge keeps all three in a private library your own AI agent can research from.
Comparisons
How Sponge compares with Readwise Reader, Pocket, Instapaper, and Omnivore, and how to move a Readwise Reader library into Sponge.
Comparison
Omnivore alternative after the 2024 shutdown
Omnivore’s team joined ElevenLabs and its hosted data was erased after exports closed on November 30, 2024. The code is still open source; Sponge is a hosted alternative.
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Comparison
Sponge as a Pocket alternative after the shutdown
Pocket shut down on July 8, 2025 and its export window closed that October. For new saves, Sponge is a private library your AI agent can research from.
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Comparison
Sponge vs Readwise Reader for AI agent research
Readwise Reader is a paid reading app for pages, feeds, newsletters, and video. Sponge is a private library of pages and PDFs your AI agent can cite.
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Migration
Move a Readwise Reader library to Sponge
List every saved document with the Reader API, then save each link to Sponge with a short script and re-create the highlights that still match.
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