CuneiForm was a close competitor to Abbyy that got open sourced, both were Russian companies. CuneiForm OCR is certainly better to Tesseract OCR. The open source Windows version is feature complete and very similar to Abbyy though it compiles only with VS 6. Some converted it to an Linux application, but most advanced features never got ported nor the great native UI is available - unfortunately. It would be great if a community would re-activate this open source OCR gem, though some Russian speaking devs are needed to translate the comments. (Tesseract OCR is based on 1995 HP OCR application and more behind than CuneiForm OCR) https://en.m.wikipedia.org/wiki/CuneiForm_(software)