I'm building a compliance pipeline and need OCR with minimal data retention

For a compliance pipeline, the main thing is to pick an OCR setup that lets you control where data is processed, whether requests are logged, and how long images/text are retained.

Best approach for minimal retention

1. Use local/on-prem OCR if possible

   • Best option for data minimization.
   • No third-party storage of documents.
   • Examples: Tesseract, PaddleOCR, EasyOCR, docTR, ABBYY FineReader Engine (self-hosted), Azure/AWS/GCP OCR only if strict retention controls are acceptable.

2. If using a cloud OCR API, verify retention settings Look for:

   • “No training on customer data”
   • “No persistent storage”
   • “Data residency” options
   • Audit log controls
   • Ability to disable request/response logging where possible

3. Minimize what you send

   • Crop to only required regions
   • Redact sensitive fields before OCR if feasible
   • Split documents by page or zone
   • Avoid sending full documents when only a field extract is needed

4. Minimize what you keep

   • Don’t store raw images unless required
   • Store only extracted text/fields necessary for compliance
   • Apply short TTLs to temp files, queues, and logs
   • Encrypt at rest and in transit
   • Separate OCR temp storage from long-term evidence storage

A practical compliant pattern

• Ingest document
• Write to ephemeral encrypted storage
• OCR in a local container or isolated VM
• Extract only required fields
• Immediately delete source image/temp artifacts
• Store only normalized output and audit metadata
• Keep a hash/signature if you need integrity proof without retaining the file

If you need vendor options

• Lowest retention / highest control: self-hosted Tesseract or PaddleOCR
• Enterprise self-hosted: ABBYY, Kofax
• Cloud with controls: AWS Textract, Google Document AI, Azure OCR — but confirm retention, region, and logging settings in your account contract/config

Questions to narrow the recommendation

1. Do you need handwritten text, forms, or just printed text?
2. Must it be fully offline/on-prem, or is cloud with no retention acceptable?
3. Do you need structured field extraction or just raw OCR text?
4. What compliance regime applies: HIPAA, GDPR, SOC 2, PCI, FINRA, etc.?

If you want, I can recommend a specific OCR architecture for your compliance requirements and retention constraints.