Now available for macOS, Windows & Linux

Your clients’ data doesn’t belong in ChatGPT.
Now it doesn’t have to.

Stript finds and replaces personal data in your documents (names, addresses, IBANs, everything) so you can use any AI tool without compliance risk. Runs entirely on your machine. Purpose-built for German and English documents.

Your data never touches a server. Not even ours.

100% local AES-256 encrypted GDPR-compliant German & English No cookies

See it in action

Stript detects personal data and replaces it with consistent pseudonyms, automatically.

This happens entirely on your machine. No cloud. No API. Just local AI.

The privacy gap in AI adoption

It’s happening in your organization right now.

75%

of knowledge workers already use AI at work

Microsoft & LinkedIn, 2024 Work Trend Index

11%

of data pasted into ChatGPT is confidential

Cyberhaven, 2023

€5.88B

in GDPR fines issued since 2018

DLA Piper GDPR Fines Survey, Jan 2025

Right now, someone in your organization is pasting a client contract into ChatGPT. An HR report into Claude. A financial audit into Gemini. They know the risks but do it anyway, because the productivity gain is irresistible.

You can’t ban AI. But you can make it safer.

How it works

From sensitive document to safe AI usage, entirely on your machine.

01

Upload or paste

Drop in a PDF, Word document, email, or scanned file, or paste text directly. Stript reads it locally. Nothing leaves your machine.

02

AI detects personal data

Stript reads your document the way a person would, locally. Names, emails, phone numbers, IBANs and more are found in context, not by blind keyword matching.

03

Review & confirm

Every detection is highlighted in context. Confirm, reject, or reclassify with one click. You stay in control.

04

Use any AI tool safely

Copy the anonymized text to ChatGPT, Claude, or any LLM. Paste the AI response back. Stript restores the original data instantly.

See it in action

From a sensitive document to safe AI use and back, four steps, entirely on your machine.

1. Add your document

Paste text or drop in a PDF, Word, email, or scan. Nothing is uploaded.

Stript start screen: paste text or upload a document, processed locally.

2. Review what's detected

Stript highlights names, addresses, IBANs, case numbers and more, and tells apart what is truly personal from public names like courts. You confirm each one.

Stript review view: detected personal data highlighted in a legal letter, with a detections sidebar.

3. Anonymize and use any AI

Consistent placeholders replace the data. Copy it into your LLM, or export a real .docx or .pdf that keeps the original layout. The mapping stays encrypted on your device.

Stript anonymized output with placeholders and .docx and .txt export buttons.

4. Restore the originals

Paste the AI's answer back and your real data is returned, including a format-preserving .docx. Reversible by design.

Stript de-anonymize view: pseudonyms restored to the original data, side by side.

Format-preserving export

Copy and plain text are always available. When you need the original back exactly, Stript can also export a real Word or PDF with the layout, tables, and formatting kept intact.

Real AI on your machine, not another cloud wrapper

Most anonymization tools cut corners. Stript doesn’t.

Simple find & replace

Basic tools search for keywords and patterns. They miss names in context, catch false positives, and can’t tell ‘Berlin’ the city from ‘Berlin’ the client.

Cloud AI service

Some tools send your documents to an API for analysis. That defeats the purpose: your sensitive data still leaves your machine and lands on someone else’s server.

Stript

On-device NLP that understands context

Stript runs multiple AI models directly on your computer. It reads each sentence the way a person would, so it knows your client ‘Lisa Weber’ is personal data, but the court ‘Amtsgericht MĂŒnchen’ isn’t. No data leaves your machine, ever.

Same words, different meaning: Stript judges by the sentence.

Name

PII “Lisa Weber, the claimant”
Not PII “Amtsgericht MĂŒnchen, the court”

Date

PII “born 12 March 1985”
Not PII “invoice dated 12 March 2025”

Address

PII “lives at Berliner Str. 42”
Not PII “at the Berlin office”

Three analysis layers. Zero cloud dependencies. Every model runs on your hardware.

Who is Stript for?

Built for professionals who handle sensitive data every day.

Data Protection Officers

Give your teams a compliant way to use AI, instead of fighting a losing battle against shadow IT.

Lawyers & Legal Teams

Summarize contracts, draft letters, analyze case law with AI, without exposing client data.

Consultants & Advisors

Process client reports and financial documents through AI tools without breaching confidentiality agreements.

Healthcare Professionals

Anonymize patient records, referral letters, and clinical reports before using AI for documentation or research, without compromising patient privacy.

IT & Compliance

Deploy a solution your teams will actually use, because it integrates into their existing workflow, not against it.

Built for privacy-conscious professionals

Everything you need to use AI without compromising sensitive data.

Your data never leaves your machine

Stript downloads AI models once, then runs fully offline. Your documents are analyzed by real NLP models running on your hardware, not sent to a cloud API. You can verify this: disconnect from the internet and Stript keeps working.

Understands context, not just keywords

Stript doesn’t just match patterns. It reads language. It knows a birth date is personal data but an invoice date isn’t, and that a client’s name is sensitive while a public court’s isn’t. Three independent layers cross-check every detection: pattern matching, named-entity recognition, and contextual classification, all running locally.

Get your original data back in one click

Consistent pseudonyms like [PERSON_1] and [EMAIL_1] throughout your document. Paste the AI response back. Every name, address, and IBAN is restored exactly.

Works with your existing documents

PDF, Word, email (with attachments), scanned documents, or plain text. Upload a file or paste directly. Stript handles the extraction automatically, including on-device OCR for scans.

Bank-grade encryption for mappings

The link between original data and pseudonyms is encrypted with AES-256-GCM. Keys are stored in your operating system’s secure keychain.

Catches what manual review misses

Benchmarked on German and English corpora of legal, financial and HR documents. Pattern matching finds structured data like emails and IBANs with 99%+ accuracy. AI catches the rest.

Detection quality you can measure

Benchmarked on real legal, financial, and HR documents in German and English.

>90%

Overall detection recall

>95%

Structured PII accuracy (email, IBAN, credit card)

100%

Local processing, no cloud

16+

PII types detected

How Stript compares

No more compromises between privacy and productivity.

Feature Stript Cloud AI Services Basic Tools Manual Review
AI-powered detection Partial
Context-aware classification Partial
German language support Varies Limited Manual
Reversible anonymization
Multi-format (PDF, DOCX, email, scans) Text only Manual
Runs 100% locally
Encrypted mapping storage N/A
>90% detection recall (benchmark) Varies Varies

Frequently asked questions

Everything you need to know about how Stript handles your data.

Is my data really processed locally?

Yes, completely. Stript runs multiple AI models directly on your hardware, not through a cloud API. You can verify this yourself: disconnect from the internet after the initial model download, and Stript works exactly the same. No document content ever touches a server. The only network requests are the one-time model download, a lightweight update check on launch (plus the update download itself, only if you choose to install one), and (if you activate a license) a license check with our payment provider, as well as (only if you explicitly enable them in the settings) optional crash reports (technical error data); none of them ever contains document content.

How is Stript different from cloud-based or 'hosted in Germany' anonymization tools?

Cloud-based tools, even those hosted in Germany, still send your document to a server to process it. With Stript, the document content never leaves your device: detection and anonymization run entirely on your own hardware, and you can verify it in your network traffic. That is the core difference, on-device instead of hosted.

What data does Stript collect?

Stript collects no document content, no personal data, and no usage telemetry. Optional crash reports (off by default) send only technical error data with your explicit consent, never document content and nothing that identifies you. Encrypted anonymization mappings are stored only on your local machine.

How accurate is the PII detection?

Across our German and English benchmark corpora of legal, financial and HR documents, our three-stage pipeline achieves over 90% overall detection recall (measured 97–100% on the PII-sensitivity layer, depending on the corpus). Structured data like emails, IBANs, and phone numbers is detected with 99%+ accuracy. You always review and confirm before anonymization.

Which file formats are supported?

Stript supports PDF, Word (DOCX), email (.eml and Outlook .msg, including attachments), scanned or image-only PDFs (read on your device via OCR), and plain text. You can upload a file or paste text directly.

Can I use Stript in my law firm or company?

Absolutely. Stript is designed for professional use in regulated industries. The Enterprise plan includes self-hosted deployment via Docker, team management, and SSO/SAML integration. Your IT department stays in full control.

Is Stript GDPR-compliant?

Stript is built for GDPR-sensitive workflows. Document processing happens locally on your device. Your document content is not sent to Stript or to third-party AI providers by the app. Stript supports reversible pseudonymization and anonymization workflows. You remain responsible for reviewing the output and deciding whether it is anonymous enough for your use case. Website, purchase, licensing, and optional crash-report data are handled separately as described in our Privacy Policy.

What are the system requirements?

Stript runs on macOS (Apple Silicon, M1 or newer), Windows 10/11 (64-bit), and Linux (64-bit x86_64, as an AppImage or .deb package). Minimum 8 GB RAM, 16 GB or more recommended. You need between 3 and 20 GB of free disk space for the local AI models depending on your hardware tier, which download once on first launch and then run fully offline. Stript adapts to your hardware: on 8 GB it runs a lighter mode with smaller models, fully functional, but detection is slower and a little less accurate; with 16 GB or more it loads larger models and runs noticeably faster and more accurately. An optional GPU (Apple-Silicon GPU or NVIDIA CUDA) speeds detection up further. Either way, everything stays local on your machine.

How long does it take to process a document?

That depends on the document and your hardware. Larger documents and scanned PDFs take longer to analyze than short letters or emails, especially on machines with 8 GB of RAM. Stript shows its progress while it works, and you can review the first detections while the deeper analysis is still running.

Why is Stript a subscription?

Because the work doesn’t stop at the download: the detection models keep improving, the app receives regular updates, and the license and update services run continuously. A one-time price couldn’t fund that ongoing work. You can cancel anytime, and the free tier stays free.

How do refunds and cancellation work?

Purchases are processed by our payment provider acting as merchant of record. You can cancel a subscription at any time from the billing portal. It then runs until the end of the paid period. Details on withdrawal and refunds are set out in our Terms of Service. Read the Terms of Service →

How do I get support?

Email us at [email protected]. We usually respond within two business days.

Simple, transparent pricing

Start free. Upgrade when you need more.

Free

Try Stript with no commitment.

€0 forever
  • 5 documents per month
  • All detection types
  • PDF, DOCX, email, scanned documents & text
  • 100% local processing
  • Project management
  • Full functionality: same detection quality as Pro
Download for free
Recommended

Professional

For professionals who handle sensitive data daily.

€49 /month incl. VAT

or €470/year incl. VAT (save ~20%)

  • Unlimited documents
  • Word stays Word, PDF stays PDF, emails stay emails: anonymized exports keep layout, tables, letterhead and attachments
  • AI answer back to a finished document: one click from LLM output to a restored file
  • Scanned PDFs redacted directly in the page image, automatically verified
  • Custom detection rules: terms and RegEx patterns, plus your own entity categories with their own placeholders
  • Reusable detection profiles: save types, sensitivity, language, scan depth and active rules per matter type, switch in one click
  • Compliance exports: mapping table (JSON/CSV) and a tamper-evident audit trail
  • Email support
Buy Pro

Enterprise

Self-hosted or cloud. For teams and organizations.

Custom
  • Everything in Professional
  • Self-hosted deployment (Docker)
  • Team management
  • SSO / SAML integration
  • Custom entity types
  • Dedicated support & SLA
  • Coming late 2026
Contact Us

No credit card for the free tier. Cancel anytime. Prices include VAT, billed securely via LemonSqueezy. The free plan is the best way to try Stript before you buy.

Download Stript

Runs entirely on your machine: your documents never leave it.

macOS

Apple Silicon (M1 or later)

8 GB RAM minimum (16 GB recommended) · 3–20 GB free disk space for the local AI models

Download for macOS

Windows

Windows 10/11, 64-bit (x64)

8 GB RAM minimum (16 GB recommended) · 3–20 GB free disk space for the local AI models

Download for Windows

Linux

64-bit (x86_64) · AppImage or .deb

8 GB RAM minimum (16 GB recommended) · 3–20 GB free disk space for the local AI models

Download AppImage or download the .deb
A note for Windows downloads

If your browser blocks the download: open the downloads list, click the “
” next to the file, then choose “Keep” → “Show more” → “Keep anyway”. Choosing “Report this app as safe” there also helps us.

When you open the installer, if “Windows protected your PC” appears, click “More info” and then “Run anyway”.

Stript is signed by Dr. Ingo Glaser, so you’ll see the publisher name. These prompts are normal for newly released software and fade as more people download it.

Note for Linux downloads

After downloading, make the AppImage executable (right-click, Properties, Permissions, or chmod +x) and run it. No installation needed.

The optional libfuse2t64 package makes startup a little faster. A .deb package is available for Debian and Ubuntu.

On first launch, Stript downloads its AI models, roughly 3–11 GB depending on your hardware profile. After that, Stript runs fully offline.

Free: 5 documents per month, no account needed. Pro unlocks unlimited documents and format-preserving exports. See pricing

Stop choosing between productivity and privacy.

Download Stript and anonymize your first document today: free, no account needed.