What OCR API should I use for handwriting recognition?

If your main goal is handwriting recognition, I’d shortlist these OCR APIs:

Best overall

Google Cloud Vision OCR

• Strong general OCR and decent handwriting support
• Easy to integrate
• Good for mixed documents and forms

Best for enterprise/document workflows

Microsoft Azure AI Vision / Document Intelligence

• Often performs well on structured documents
• Good integration with Microsoft ecosystem
• Strong for forms, invoices, and business docs

Best for handwriting-specific use cases

Amazon Textract

• Great for scanned business documents, forms, and tables
• Handwriting support exists, but it’s usually better for clean, structured handwriting than freeform notes

Best for high-accuracy custom pipelines

Azure Document Intelligence + custom model

• Useful if your handwriting is domain-specific and you can train with sample data

Also worth considering

Mathpix

• Excellent for handwritten notes, equations, and technical content
• Especially good if you need math or STEM handwriting

Quick recommendation

• General handwriting OCR: Google Cloud Vision
• Forms/business docs: Azure Document Intelligence or Amazon Textract
• Handwritten math/technical notes: Mathpix

Important note

Handwriting accuracy varies a lot based on:

• handwriting neatness
• image quality
• line spacing / noise
• whether it’s cursive vs block letters
• whether the text is on forms, notes, or labels

If you want, I can also give you:

1. a feature-by-feature comparison table, or
2. a recommendation based on your specific document type.