For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
Mobile US PressList your app
Vendor dashboard

Calamari OCR

No phone app

6.0No. 22 of 27
in OCR API Software
  • Recognised40% of the score37
  • Phone app26% of the score0
  • Documented20% of the score81
  • Free plan14% of the score30
Free plan
No
Runs on
api, Linux, self-hosted
Visit site Alternatives

Summary

Calamari OCR is ranked #22 of 27 in OCR API software on Samsung Mobile US Press. It runs on API, Linux, Self-hosted.

Compared on OCR API software

Structure extraction
Yesgithub.com
Handwriting OCR
Yesgithub.com
SDK languages
Pythongithub.com

Facts

Purpose
Calamari is a Python 3 OCR engine based on OCRopy and Kraken.github.com · 4 Oct 2026
Line recognition
The project describes Calamari as a line based text recognition engine.github.com · 4 Oct 2026
Command line
Calamari is designed to be used from the command line.github.com · 4 Oct 2026
Customization
The engine is modular and can be integrated and customized from Python scripts.github.com · 4 Oct 2026
Training
Its documentation includes commands for training, resuming training, and cross fold training models.calamari-ocr.readthedocs.io · 4 Oct 2026
Pretrained models
The project links to repositories of pretrained and experimental models.github.com · 4 Oct 2026
Data formats
The documentation lists plain files, PageXML, Abbyy, and HDF5 dataset formats.calamari-ocr.readthedocs.io · 4 Oct 2026
PageXML workflow
For PageXML training, the documentation instructs users to provide page images with corresponding XML files.calamari-ocr.readthedocs.io · 4 Oct 2026
Installation
The maker provides pip installation instructions and a source installation path, with Conda as an alternative environment setup.calamari-ocr.readthedocs.io · 4 Oct 2026
License
The repository is published under the GNU General Public License version 3.github.com · 4 Oct 2026
Audience
PyPI classifies the package for developers, education, and science or research, and labels it OS independent.pypi.org · 4 Oct 2026
Notable limitation
The command line documentation states that currently only OCR on lines is supported.github.com · 4 Oct 2026
Support
The project links users to its documentation for further installation and usage instructions.github.com · 4 Oct 2026

Best Calamari OCR alternatives

See all 12
OCR.space No. 1 9.8 iPhone + Android$30/moPaddleOCR No. 2 9.7 iPhone + AndroidFreeTesseract OCR No. 3 9.5 iPhone + AndroidFreeVeryfi Invoices OCR API No. 4 8.3 iPhone + Android$500/moAmazon Textract AnalyzeExpense No. 5 7.8 No phone app$0.01/moOCRmyPDF No. 6 7.8 No phone appFree

Where it ranks on Samsung Mobile US Press

Is Calamari OCR yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Calamari OCR

Sources