char-detection has too few stars to analyse. Below that threshold there are rarely enough comparable projects for the list to be worth reading.
What is known so far comes from the other direction:
These projects were analysed and named char-detection among their alternatives. The relationship is not symmetric — how char-detection rates them is a separate judgement, made when char-detection is analysed in its own right.
calls char-detection “Only single-character detection; pick when you need character boxes rather than full OCR pipeline.”
超轻量级中文ocr，支持竖排文字识别, 支持ncnn、mnn、tnn推理 ( dbnet(1.8M) + crnn(2.5M) + anglenet(378KB)) 总模型仅4.7M