When comparing OCR.Space vs Tesseract, the Slant community recommends Tesseract for most people. In the question“What are the best OCR libraries?” Tesseract is ranked 1st while OCR.Space is ranked 4th. The most important reason people chose Tesseract is:
A full list of languages can be found [here](https://github.com/tesseract-ocr/langdata).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro API
Free API available, can be used for free up to 25000 requests per month.
Pro C# (Visual Studio Project)
Ready-to-use C# project for using the OCR API on GitHub.
Pro Understands 40 languages
A full list of languages can be found here.
Pro Free, open source and cross-platform
Tesseract is licensed under the Apache with source code available on GitHub. It's available for free on Windows, Linux and OSX.
Pro Multiple front-ends available
Multiple GUIs have been developed for Tesseract, including OCRFeeder.
Pro Can work with custom training data
By inputting custom .traineddata files, Tesseract can adapt to different styles of text accurately.