The Existing Players
There is already a healthy ecosystem of literature review tools, and each one is strong in its own lane. If your need falls into any of these lanes, you should use these tools directly -- EasyLit does not compete with them.
| Tool | Strength | What It Is |
|---|---|---|
| Elicit | Semantic search across 125M+ papers, AI-generated summary tables | Discovery and abstract-level extraction |
| Research Rabbit | Citation graph exploration, "Spotify for papers" | Discovery |
| Litmaps | Visual citation maps, alerts on new related work | Discovery and monitoring |
| Connected Papers | Visual graph of related work from a seed paper | Discovery |
| Scite | "Smart citations" showing supporting vs. contradicting claims | Citation analysis |
| Covidence / Rayyan | PRISMA-style screening workflows for systematic reviews | Team screening |
| SciSpace | Chat-with-PDF, extraction tables, paraphrasing | Full-text analysis |
The Corpus-Access Problem Nobody Talks About
Every one of the discovery-focused tools above runs into the same wall: getting actual full text is expensive and legally complicated.
Most of them lean on Semantic Scholar (~200M papers), OpenAlex (~250M works), CrossRef, PubMed, arXiv, or DOAJ for their backing corpus. These sources are free or near-free, but they only reliably provide metadata and abstracts, plus full text for open-access papers. Anything behind a publisher paywall is out of reach without direct licensing deals. Elicit has been working on publisher agreements, but those are slow, expensive, and incomplete. Covidence and Rayyan sidestep the problem entirely by making you upload the PDFs yourself, and SciSpace increasingly does the same.
The overhead this creates is substantial:
- Embedding and indexing compute for hundreds of millions of papers
- Ongoing metadata freshness (retractions, DOI changes, new preprint versions)
- Legal and contractual work to license full text where possible
- Storage that scales linearly with every user who uploads their own library
All of that is why every full-featured tool in this space charges somewhere between $12 and $20 per month to individuals, or thousands per year to institutions. The costs are real and somebody has to pay them.
What EasyLit Does Differently
You already solved the hardest problem.
Your institutional library paid for the access. Zotero stored the PDFs. You did the relevance filtering and screening. EasyLit starts from a curated, paid-for, legally-accessed collection and does the one remaining job: pulling structured research data out of those PDFs. No corpus to maintain, no licensing to negotiate, no storage bill that scales with every user.
The entire cost surface of EasyLit is the Claude API calls for the specific PDFs you point it at. That is precisely why the donorware model works here and would not work for a tool like Elicit. They are paying for the corpus and the compute; EasyLit only pays for the compute, and only on demand.
Why You Might Prefer EasyLit
- You already curated the corpus. EasyLit is a post-curation extraction tool, not a discovery tool. If you already have a Zotero collection of the papers you care about, this is the straight line from "200 PDFs in a folder" to "structured CSV of constructs, variables, hypotheses, scales, and gaps."
- Structured extraction tuned for empirical research. The schema is opinionated: constructs, IV/DV/moderator variables, hypothesis-level row expansion with beta coefficients and effect sizes, measurement scales, sample characteristics, themes, and research gaps. Specifically aimed at quantitative and mixed-methods dissertation and meta-analysis work.
- Donorware, free to end users. Shared Claude API key with a daily per-user cap. No subscription, no paywall, no credit card.
- Zotero-native. Collection tree picker, PDF resolution from local storage or the Zotero API, BibTeX round-trip. No re-uploading a library you already maintain.
- Transparent and self-hostable. Public repo. You can run it on your own Droplet with your own Anthropic key. Your PDFs and prompts do not flow through a closed SaaS stack.
- Reports out of the box. HTML report with SVG publication timeline, variable co-occurrence matrix, 10 citation styles, and BibTeX export. Most competitors stop at "here is a table, export to CSV."
Where EasyLit Is Deliberately Weaker
- No discovery or search. If you do not already have a Zotero library, EasyLit cannot help you build one. Use Elicit, Research Rabbit, or Litmaps for that stage.
- No PRISMA screening workflow. Covidence and Rayyan own that space and do it well.
- No citation graph visualization. Research Rabbit, Litmaps, and Connected Papers own that.
- Single-worker Flask app. Not built for large team collaboration the way Covidence is.
The Honest Pitch
If you are a researcher who already uses Zotero and needs to pull structured empirical data out of a curated collection, without paying a monthly subscription or uploading your library to someone else's server, EasyLit is for you. It is a sharp tool for a narrow slot, not an Elicit killer.
The rest of the landscape is built around the assumption that the tool should find and host the corpus. EasyLit is built around the opposite assumption: that you already did that work, and what you actually need is the extraction step.