promptshield - 2026 Pricing, Features, Reviews & Alternatives

promptShield is a privacy-first document anonymizer that runs entirely on your own machine. Built for teams handling confidential files — legal, healthcare, finance, HR, and compliance — it detects and redacts personal and sensitive data before documents are shared, without ever sending a byte to the cloud.

How it works. A three-layer detection pipeline combines high-precision regex patterns (SSNs, emails, phone numbers, IBANs, national IDs, financial figures), on-device AI named-entity recognition, and optional local LLM analysis. Detections are merged, de-duplicated, and propagated across pages, so a name found on page 1 is caught on page 12. You review every proposed redaction, adjust anything, and export a clean file in seconds.

Reversible tokenization. Instead of destroying data, promptShield can replace each value with a stable code and store the mapping locally. Share the coded document — or paste it into ChatGPT, Claude, or any AI tool — then decode the response on your machine to restore the real values. The original data never leaves your device.

Security and architecture. Fully offline by design: the only network calls are license validation and optional crash reporting. Works with PDFs and Office formats, including scanned/OCR documents. Multi-language detection across seven languages. Local processing means no data retention, no third-party servers, and a strong fit for GDPR, HIPAA, and other strict data-protection regimes.

Start free. The free plan is not a time-limited trial or a locked demo — it's a fully functional, offline redaction tool you can use on real documents from day one, with no credit card required. Move to a paid plan only if you later need higher volume or advanced capabilities.

Fast, private, and fully under your control — promptShield lets you get the productivity of modern AI on the documents you could never safely upload before.