Tesseract vs Marker
Both are alternatives to AWS Textract. Here's how they stack up — verified facts, no spin.
Also searched as Marker vs Tesseract — same comparison, one verdict.
Tesseract is open source (Apache-2.0) and Marker is not (GPL-3.0 with commercial revenue condition) — so the real question is whether you want to own the document ai & ocr stack or rent it.
Tesseract
Thirty years old, Apache-2.0, and it runs absolutely everywhere.
Tesseract is the OCR engine most of the world's text extraction has quietly gone through, originally from HP, developed by Google for a decade, and Apache-2.0 throughout. It recognises over a hundred languages, has bindings for every language you might be writing in, and is packaged in every Linux distribution. Modern neural extractors beat it on complex layouts, but on clean scanned text it is fast, dependable and effectively free of dependencies — often the right tool precisely because it is boring.
Marker
The best PDF-to-Markdown quality here — check the licence first.
Marker converts PDFs to Markdown with the highest fidelity of anything in this list: it handles equations, code blocks, tables and multi-column layouts, and optionally uses an LLM pass to improve difficult sections. For academic papers and technical documents the output quality is noticeably ahead. The caveat we would rather state than have you find in a licence review: Marker is GPL-3.0 with an additional revenue condition from its maintainer, so organisations above a revenue threshold need a commercial licence. Free for research and for smaller organisations, but not unconditionally.
Side by side
6 points of comparison, every one read from a verified field. Green marks the side that wins a row outright. A dash means we do not hold that fact — never that it is zero.
| Tesseract | Marker | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 95 | 70 |
| Open source | Yes | No |
| Self-hostable | Yes | Yes |
| Local-first data | Yes | Yes |
| License | Apache-2.0 | GPL-3.0 with commercial revenue condition |
| Pricing | Free, Apache-2.0. | Free below the maintainer's revenue threshold; a commercial licence is required above it. |
Tesseract edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
Weighing both against staying on AWS Textract? Is AWS Textract free? What it actually costs →
Tesseract
Strengths
- +Over a hundred languages, bindings for everything
- +Extremely mature and stable — decades of production use
- +Packaged everywhere; trivial to install and deploy
- +Apache-2.0 with no dependency weight
Trade-offs
- −Weak on complex layouts, multi-column pages and tables
- −Needs image pre-processing for good results on poor scans
- −No document understanding — it gives you text, not structure
Marker
Strengths
- +Best PDF-to-Markdown fidelity of the options here
- +Handles equations, code blocks and complex tables well
- +Optional LLM pass for difficult pages
- +Runs entirely locally
Trade-offs
- −Not unconditionally open source — revenue-gated commercial terms
- −GPL-3.0 copyleft affects how you can distribute derived work
- −GPU strongly recommended for reasonable throughput
Which one fits you
The trade-offs above, turned into a decision. Find the line that describes your team.
Choose Tesseract
if you want the source and the option to fork it, and over a hundred languages, bindings for everything.
Choose Marker
if best PDF-to-Markdown fidelity of the options here.
Neither, yet
if both carry a real cost you should weigh first — weak on complex layouts, multi-column pages and tables, and not unconditionally open source — revenue-gated commercial terms. If either of those is a dealbreaker for your team, the shortlist is wrong rather than the choice.
Tesseract vs Marker — common questions
Is Tesseract a better fit than Marker for document ai & ocr?
It depends on what you are optimising for, and the honest split is this: Tesseract scores 95 to Marker's 70 on data ownership and exit cost, so it is the safer choice if you care about being able to leave. Marker earns its place on a different axis — best PDF-to-Markdown fidelity of the options here. Neither is a wrong answer for every team; the table above is the actual comparison.
What happens if we want to switch later?
Tesseract keeps its data local or in open formats, so leaving is an export rather than a negotiation. Marker is still self-hostable, so the files stay on your server either way — but it is not local-first by design, so check what its export produces before you rely on it.
Can I self-host Tesseract or Marker?
Both can be self-hosted. The difference is what it costs you in time rather than whether it is possible — see the setup and maintenance rows above.
Are Tesseract and Marker both alternatives to AWS Textract?
Yes — both appear in our AWS Textract comparison, which is why they are worth putting side by side. People usually arrive here already having decided to move off AWS Textract and now choosing between the two replacements, which is a narrower and much easier question.
Related alternative guides
Facts verified 2026-08-11. Licenses and pricing change — spotted something out of date? That's a correction we want.