LitSourceLitSource

LitSource Pricing

Pricing

Pick what matches your workload: Free, Pro, or Trial Plan, all under one shared credit system.

PubMed Search Assistant Lite (Chrome Web Store)

Choose by task

Not sure which plan fits? Start with the task you need to finish.

Free

Perfect for trying out LitSource and light citation verification.

$0/ month

Includes

  • 10 credits per month
  • Sentence-level literature search with advanced filters
  • PubMed Search Assistant Lite (Chrome): generate queries, view queries, check journal impact factors, and export queries
  • Citation Checker (Verify): 3 credits per <=10 references
  • AI paper summary: 1 credit per request
  • Search history and share links
  • Original PDF open & download when available
  • Manual citation copy (APA/MLA/Chicago/BibTeX/Vancouver)
  • See /docs/coverage for source coverage and evidence boundaries
Most Popular

Pro

For serious research and high-frequency citation verification.

$12.99/ month

Everything in Free, plus

  • 500 credits per month
  • Everything in Free
  • PubMed extension integrated with LitSource: query generation, impact factor lookup, query export, and batch export of papers + query sheets
  • Full Citation Checker (Verify) access with shared credits
  • AI paper summary: 1 credit per request
  • One-click export (RIS, BibTeX, CSV) with no extra credit charge
  • Built for high-frequency research workflows

What you can actually do

All plans share one credits pool. These examples show how credits map to real research tasks.

Add citations to existing claims

Each successful reverse search costs 1 credit, useful for handling claims in papers, reviews, and revision comments one by one.

Batch-check reference authenticity

Verify costs 3 credits per ≤10 references, useful before submission to check DOI, title, year, and source consistency.

Read papers faster

AI paper summaries cost 1 credit each, useful for deciding whether a paper deserves a close read.

Generate PubMed queries

Each generated query costs 1 credit, useful for turning natural-language questions into executable PubMed searches.

Export citations and results

RIS, BibTeX, and CSV exports do not cost extra credits, but require Pro or Trial Plan access.

Open sources and PDFs

No extra credits when the source file is available. Use the original context as the final citation authority.

Some older pages may have referred to searches or earlier Verify billing rules. The current pricing page and in-product balance treat credits as the single source of truth.

See coverage and source boundaries

Frequently Asked Questions

Real citations, real fast. Here's what you need to know.

Can't find what you're looking for? Contact our support team