Free · Work · 5 of 7 tools · updated Oct 27, 2026
Free AI tools for extract data from documents
Unstructured is the strongest tool for extract data from documents you can use without paying, at 66/100. What you get for nothing: Apache 2.0 core; the hosted platform and connectors are paid. 5 of the 7 tools tracked for this job have a free tier, an open-source licence, or are free outright. It is also the top-ranked tool for this job overall, free or not.
Same evidence score as the ranking — GitHub stars, Hacker News mentions, Wikipedia readership, release activity, free access — recomputed nightly, never sold. See all 7 tools for extract data from documents.
Top 3
evidence / 100
+ The connector list is the real product - S3, SharePoint, Confluence and Drive land as clean chunks.
− The open library's best parsing paths push you toward the paid API.
+ Reads a table as a table, and does it on your own machine with nothing sent anywhere.
− Heavy scanned documents want a GPU; CPU-only runs are slow on long PDFs.
+ Beats the old OCR engines on messy scans and non-Latin scripts, locally.
− The licence is not plain open source above a revenue line - read it before shipping.
All 5, side by side
| Tool | Score | Pricing | What you get free | Platforms |
|---|---|---|---|---|
| Unstructured | 66 | Open source | Apache 2.0 core; the hosted platform and connectors are paid | cli, api, linux, mac |
| DDocling | 64 | Open source | MIT; runs locally, no API key | cli, api, linux, mac, windows |
| Surya | 42 | Open source | Weights are free for research and small companies; a commercial licence applies above a revenue threshold | cli, api, linux, mac |
 LlamaParse | 18 | Free tier | Free pages each day, then per-page credits | api, web |
 Mathpix | 11 | Free tier | Free snips each month; paid by volume or API call | web, api, mac, windows, linux, ios, android |
A free tier counts, and so does an open-source licence you can self-host — both are in the table, so a tool that is only free for a trial is not here.
Head to head: Unstructured vs Docling Unstructured vs Surya Docling vs Surya