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

SCI-HUB
arXiv
Ladder
13 Feet Ladder
PaywallBuster
Z-Lib
Archive.org
Legally read research papers behind paywalls.

Which is more popular?
Based on our record, Unpaywall seems to be more popular. It has been mentioned 44 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | agent-memory.dev | unpaywall.org |
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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
Overall verdict
Why this product is good
Recommended for
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How to Access Research Articles for FREE with Unpaywall
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GetTheResearch.org is an Artificial Intelligence(AI) powered search engine for search and understand scientific articles for researchers and scientists. It was developed as a part of the Unpaywall project. Unpaywall...
Recommendations tracked on public social media and blogs since March 2021.


Tracking Agentmemory since Jun 2026.
You might also find this interesting: https://unpaywall.org/. Source: almost 3 years ago
> can you detail what the possible issue is? Why? Are you in a position to help everyone? (As you probably guessed while reading the comment you replied to, I don't really need help; more on that below). "Occasional" is not universal;... - Source: Hacker News / about 3 years ago
There are many of course the problem is that the ai hallucination problem is still a huge issue. For instance, getting all of https://unpaywall.org/ or something similar into an LLM would be a boon for scientists, but... If you can't... Source: over 3 years ago
When comparing Agentmemory and Unpaywall, you can also consider the following products.

Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client
Compare ChainMemory to Agentmemory or Unpaywall:

It provides mass and public access to tens of millions of research papers
Compare SCI-HUB to Agentmemory or Unpaywall:


arXiv is a free distribution service and an open-access archive for scholarly articles.
Compare arXiv to Agentmemory or Unpaywall:

Persistent memory from agent trace, not just conversation
Compare Memori to Agentmemory or Unpaywall:
Community-first career growth for the next generation.
Compare Ladder to Agentmemory or Unpaywall: