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On-device AI for document privacy.

Document redaction with automatic PII detection, powered by our multilingual small language models that run entirely on your device. Built for lawyers, journalists, researchers, and compliance teams.

Designed and built in the Netherlands

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Document redaction for Mac · On-device AI

Solander.

Redact PDF, Word and Excel with provenance receipts. Own small language model fine-tuned on English, French and Dutch for optimal performance.

Free for one document at a time. No account.

Email me at launch See Solander
Writing

Machine learning · Engineering notes

Engineering blog

  1. Multi-Task Learning as Inductive Bias Under Distribution Shift

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AI models have long outrun what most tasks actually require. The issue today is rarely about model power but rather about vague task definition or inadequate security. We design purpose‑built software around small language models, each specialised for a specific job and small enough to run on your device.

Our software

Offline, no account

  • Launching soon

    Solander

    macOS 14+ · from $49

    Redact PDFs, scans, Word and Excel files, with personal details found by our own small language model. Then check that the redaction held.

    Editions
    PDF ($49) for PDFs and scans. Desk ($69) for Word and Excel, with names swapped for placeholders.
    Checks
    Reads its own output back for anything still legible
    Records
    A redaction log and a signed report with every export
    Network
    None. The app has no network entitlement.
    Email me at launch More on solander.quietsignalslab.com
  • Available

    ShadowClip

    macOS 14+ · iOS 17+

    Redact screenshots before they go to an AI tool, a colleague or a support ticket. Review what it found, then save a clean copy. The original is never touched.

    Finds
    API keys and tokens, card numbers, IBANs, emails, faces, QR codes, names
    Network
    None. The app has no network entitlement.
    Price
    One purchase covers Mac and iPhone
    Download ShadowClip on the App Store About ShadowClip
  • Available · free

    RAG Assistant for Zotero

    macOS · Windows · Linux · GPL-3.0

    Semantic search across your Zotero library. Describe what's on your mind and it finds related passages in your PDFs, surfacing connections you might miss in a literature review. A library clerk, not a summariser.

    Search
    Semantic and keyword search together, reranked passage by passage
    Models
    Local with Ollama or LM Studio, or a cloud provider you choose
    Downloads
    9,000+ across 30+ releases
    Sources
    Every passage cited to its paper and page, filterable by year, tag, collection or author
    About the app GitHub
About

Thanks for visiting my website!

My name is Alex. I am an engineer and applied researcher working on privacy, safety, and reliability in AI systems. Through my client and open-source work, I program systems that are often hybrid -- making the best of what probabilistic models offer, combined with deterministic constraints. My background in both ML and business lets me act as a bridge between the two, with end-to-end ownership of what I build.

Don't hesitate to drop me a message if you are interested in what I do.