
ChainMemory
Mem0
Memori
Pieces for Developers
cognee
TheSecondBrain.dev
Claiv Memory
Persistent memory for Claude Code, Codex & coding agents

Diigo
Glasp
LINER
Weava
Obsidian
Markup-Annotation Expert
Readwise
Annotate with anyone, anywhere

Which is more popular?
Based on our record, Hypothes.is seems to be more popular. It has been mentioned 49 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | agent-memory.dev | web.hypothes.is |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Hypothes.is yet.
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Hypothes.is Overview
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Share your experience with using Agentmemory and Hypothes.is. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking Agentmemory since Jun 2026.
For web annotations, Hypothesis (https://web.hypothes.is/) has a Firefox extension that lets you annotate web pages and PDFs with public or private notes. It requires an account but the annotations are stored on their server — which is... - Source: dev.to / 29 days ago
> Does Hypothes.is have a self-hosting option? https://web.hypothes.is/sales/ The code for both the client and server are open source (https://github.com/hypothesis/h mostly targets schools and universities, because Hypothesis pays for... - Source: Hacker News / over 1 year ago
How is this different from the public annotations in https://web.hypothes.is ? - Source: Hacker News / about 2 years ago
When comparing Agentmemory and Hypothes.is, you can also consider the following products.

Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client
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Diigo is a powerful research tool and a knowledge-sharing community
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Persistent memory from agent trace, not just conversation
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LINER AI Copilot is currently powered by ChatGPT/GPT-4, Google Search Engine, and information from high-quality highlights of an enormous number of users from all around the world.
Compare LINER to Agentmemory or Hypothes.is: