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Azure Document Intelligence vs Chandra

Chandra is cheaper per page; Azure Document Intelligence is faster; only Azure Document Intelligence supports confidence; only Chandra supports math.

Get API keyAll models
Azure Document Intelligenceazure/document-intelligenceChandradatalab/chandra
TypeOCR APIOpen source
Price15 credits / page2 credits / page
Per 1,000 pages$15.00$2.00
Typical speed1.5 s / page2.0 s / page
Best forEnterprise forms and IDsComplex layouts and handwriting
InputsPDF, imagesPDF, images
Languages300+ languages40+ languages
Max pages per request2,000500
Tables✓ Yes✓ Yes
Handwriting✓ Yes✓ Yes
MathNo✓ Yes
Bounding boxes✓ Yes✓ Yes
Confidence✓ YesNo
Forms✓ Yes✓ Yes
Multilingual✓ Yes✓ Yes
On OCRRouterAvailableComing soon

Prices are what you pay on OCRRouter. Speed is the provider's typical figure, not a benchmark we ran.

What each one is

Azure Document Intelligence

Azure layout model with tables, selection marks and prebuilt invoice and ID readers.

Azure Document Intelligence details

Chandra

Datalab's OCR model that keeps layout and handles forms, tables and handwriting.

Chandra details

Use one, fall back to the other

Request body
{
  "model": "azure/document-intelligence",
  "fallbacks": ["datalab/chandra"],
  "file_url": "https://example.com/document.pdf"
}

Questions

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