---
title: "Discussion on \"Presidio vs regex before the LLM: author P/R/F1 on 30 synthetic docs\" | Hashnode"
description: "Discussion on \"Presidio vs regex before the LLM: author P/R/F1 on 30 synthetic docs\". Canonical: PII redaction Presidio vs regex on eWorld.liveCheck date: 2026-09-28 PT · API spend $0\n30 author synthetic English docs / 33 gold spans (EMAIL/PHONE/CC/SSN/PERSON/LOC + confounders). Regex"
url: "https://hashnode.com/posts/presidio-vs-regex-before-the-llm-author-p-r-f1-on-30-synthetic-docs/6aba84adae8eec315ee08420"
---

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Discussion

# [Presidio vs regex before the LLM: author P/R/F1 on 30 synthetic docs](https://eworldlive.hashnode.dev/presidio-vs-regex-before-the-llm-author-p-r-f1-on-30-synthetic-docs?utm_source=hashnode&utm_medium=feed)

Canonical: PII redaction Presidio vs regex on eWorld.liveCheck date: 2026-09-28 PT · API spend $0 30 author synthetic English docs / 33 gold spans (EMAIL/PHONE/CC/SSN/PERSON/LOC + confounders). Regex

Sep 28 · 1 min read · eworldlive.hashnode.dev  
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-   [#pii](https://hashnode.com/tag/pii)
-   [#presidio](https://hashnode.com/tag/presidio)
-   [#privacy](https://hashnode.com/tag/privacy)
-   [#rag](https://hashnode.com/tag/rag)
-   [#spacy](https://hashnode.com/tag/spacy)

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