Find primary sources in seconds, not hours.Find primary sources
in seconds, not hours.
Type any historical topic. AI identifies real primary and secondary sources, finds free open-access copies across dozens of archives, and helps you analyze, learn from, and write about them, all in one place.
From curiosity to finished research in one place.
1. Search
Type any topic. AI identifies real primary and secondary sources ranked by scholarly importance.
2. Access
Get direct links to free copies across open-access archives, plus related books, PDFs, articles, and videos.
3. Understand
Add any source to Sofia. She reads the actual content and answers your questions about it.
4. Analyze
Fact-check, bias check, deep dive, timeline, and historiography built into every source.
5. Write
Save sources to a workspace. Write essays and reports backed by evidence with AI assistance.
Built for people who care about evidence.
Whether you're writing a paper, exploring a rabbit hole, or building a lesson plan.
- -Trace claims back to original sources and verify them.
- -Run bias checks and cross-reference across multiple sources.
- -Ask Sofia to flag gaps, missing context, and weak evidence.
- -Go deeper than Wikipedia. Find the actual documents behind the story.
- -Explore related sources, timelines, and competing interpretations.
- -Listen to AI-generated podcasts that bring sources to life.
- -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.
- -Run structured analysis: fact-check, bias check, historiography.
- -Compare interpretations and trace scholarly debates.
- -Write research papers in the Notetaker with AI assistance and source references.
- -Build lesson-ready source packs with context and links.
- -Generate quizzes and flashcards for active recall.
- -Ask Sofia for discussion prompts grounded in sources.
- -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.
Beta access
Sign up as a beta user to try Primary Source Finder and help shape it with feedback. Free to try, no credit card required.
What you get as a beta user
Early access to the core experience, plus a direct channel to share feedback as we improve accuracy and UX.
- Free to try as a beta user, no credit card required
- Priority access to new features as they ship
- Share feedback to help improve the product faster
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 the app aggregates better than manual searching and provides location details for sources that are only available physically.
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?
The AI is trained to identify sources from reputable archives and repositories, and uses web search to verify that source titles are real. Each source includes metadata so you can evaluate it yourself. 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 primary sources, access the documents, and write with confidence.