Free AI tools for researchers
Free AI tools for researchers
Four of our six tools are free with no signup: Pre-Check (acceptance-probability scoring), the Research Gaps Finder, the Journal Recommender, and the Duplicate Publication Checker. Two are paid: AI Review and the Article Writer. This page is the honest index — what each tool does, what it costs, and which one you actually need for the stage you're at.
The free tools (no signup)
Four tools are free and unlimited. They cover the whole pre-submission stage of a paper — scoring, scoping, journal selection, and the duplicate-publication check — and none of them require an account:
- Pre-Check — paste a title + abstract, get a calibrated Tier 1-5 acceptance probability, the detected field, and a ranked target-journal shortlist in ~15 seconds. Runs on a local 33,976-paper library; zero LLM cost. → /pre-check
- Research Gaps Finder — search any topic to surface the open research questions in that field, synthesised from 13,000+ papers and the 250M-work OpenAlex graph. 17,000+ gaps pre-indexed. → /research-gaps
- Journal Recommender — paste a title + abstract for a ranked shortlist of target journals from a 1,214-venue index, each with tier, open-access status, citation rate, publisher, and a predatory-journal flag. → /journal-recommender
- Duplicate Publication Checker — cross-references your title + abstract against CrossRef, arXiv, medRxiv, bioRxiv, Unpaywall, and a 900,000-paper library in ~30 seconds to flag prior-publication and salami-slicing risk. → /duplicate-publication-checker
The paid tools
Two tools involve LLM cost on every run, so they are metered. Both are explicitly cheaper than the alternatives they replace:
- AI Review — upload a full manuscript PDF and 8 specialist agents return a structured editorial decision with line-level revision suggestions in under 15 minutes. $10 for a single review, or $15/mo for unlimited. → /ai-review
- Article Writer — a 9-step wizard from a research gap to a submission-ready manuscript: grounded citations, real data analysis, an 8-agent reviewer gauntlet, and LaTeX/DOCX/PDF export. Part of the $15/mo plan, credit-metered à la carte. → /article-writer
Which tool do I need?
A quick decision guide by where you are in the research cycle:
- Starting a new project, looking for a question → Research Gaps Finder (free).
- Have a draft, wondering if it's ready → Pre-Check (free) for the Tier verdict.
- Draft is solid, deciding where to submit → Journal Recommender (free).
- Worried about prior-publication or salami-slicing overlap → Duplicate Publication Checker (free).
- Want a full, calibrated peer-review report before you submit → AI Review (paid).
- Have results and a gap but a blank-page problem → Article Writer (paid).
Why four of the six are free
It's a deliberate model, not a trial gimmick. The four free tools — Pre-Check, Research Gaps, the Journal Recommender, and the Duplicate Publication Checker — all run on local indexes with no LLM call, so each search costs us effectively nothing. There's no reason to gate them, so we don't: no signup, no rate-limit games, no upsell baked into the tool itself.
We make money on the two tools that have real per-run LLM cost — AI Review and the Article Writer. The free tools exist to be genuinely useful on their own and to earn the trust that makes you consider the paid ones when you need them. That's the whole arrangement.