Research. Verify. Fact-Check with Real Primary Sources.Research. Verify.
Fact-Check with Real Primary Sources.
Searching for primary and secondary historical sources across dozens of archives takes hours. PrimarySourceFinder returns 10 ranked sources instantly, surfaces free copies, and lets you verify every one before you cite it.
From curiosity to finished research in one place.
1. Search
Finding the right sources takes hours. Get 10 ranked primary and secondary sources in seconds.
2. Access
Most sources hide behind paywalls or scattered archives. Search surfaces the free copies for you.
3. Understand
Share any source with Sofia. She reads it, fact-checks claims, spots bias, and answers questions.
4. Analyze
Don't cite sources blindly. Fact-check, spot bias, and see how historians actually debate each one.
5. Write
Stop switching tabs. Write with your sources open and export your finished research to Word.
Real documents from real archives. Not AI-generated citations.
Built for people who care about evidence.
Whether you're writing a paper, exploring a rabbit hole, or building a lesson plan.
- -Go deeper than Wikipedia. Find the actual documents behind the story.
- -Explore related sources, timelines, and competing interpretations.
- -Turn any source into a two-host AI podcast, with audio.
- -Get verified historical material for podcasts, videos, and articles.
- -Pull timelines, key takeaways, and source-backed context fast.
- -Spot weak claims and misleading framing before you publish.
- -Build a source list for your history paper in minutes, not days.
- -Get summaries, key points, and outlines from real sources.
- -Study with quizzes and flashcards generated from your sources.
Join the beta
Get 200 free credits to try the full product. No credit card. Share what you think and help shape where it goes.
FAQ
Frequently asked questions
What types of sources can I find?
Primary and secondary sources across all historical periods: original documents, manuscripts, letters, speeches, government records, academic analyses, books, and more. Each source comes with metadata like author, date, type, location, and historical context.
Can I access the actual documents?
Primary Source Finder searches across open-access archives like archive.org, the Library of Congress, National Archives, Project Gutenberg, and more to find free copies of the sources it identifies. Not every source will have a free online version, but one search here covers more ground than hours of browsing archives manually, and includes location details for sources only available in person.
Who is Sofia?
Sofia is your AI research assistant. She can read the actual content of sources you share with her, answer questions about what they say, fact-check claims, analyze bias, and help you write. She is available as a chat assistant and inside the Notetaker as a writing tool with 22 built-in commands.
Can I export my research?
Yes. You can save sources to workspaces, take notes alongside them in the Notetaker, and export your writing as Word documents (.docx). Individual source notes can also be saved as text files.
Is there a limit to the number of searches?
You get 200 free credits on signup. Each feature uses credits (for example, a search costs 10 credits, a deep dive costs 20). During the beta, you can share feedback to receive more credits.
How do you ensure source quality?
Every source identified includes author, date, type, and archive location so you can verify it yourself. Sources are cross-referenced against the live web before displaying to reduce errors. Built-in fact-check and bias check tools let you assess reliability directly.
Back up what you say with real evidence.
Stop Googling through dozens of archives. Find real primary sources and write backed by actual evidence.