---
title: PromptRails
---

# PromptRails

**Local-first, honestly-benchmarked AI for privacy.**

We build small models that run on your own machine — no cloud, no API, no data
leaving the device — and we test them on independent, adversarial benchmarks so
the numbers actually mean something.

## Shipped

🔒 **[piimask-qwen2.5-0.5b](https://huggingface.co/promptrails/piimask-qwen2.5-0.5b)**
— a 0.5B model that detects PII in **English and Turkish**, fully on-device.
Turkish PII (names, addresses, TCKN, IBAN) is underserved by English-first tools;
piimask is built for it.

📊 **[piimask-eval-tr-en](https://huggingface.co/datasets/promptrails/piimask-eval-tr-en)**
— an independent, adversarial **bilingual** PII benchmark. We publish the set we
test on — including the cases we still miss.

## What we care about

- **Local-first** — privacy by default; nothing leaves your machine.
- **Honest benchmarks** — independent sets, disclosed limitations, reproducible numbers.
- **Open** — Apache-2.0 weights, open eval data.

🌐 [promptrails.ai](https://promptrails.ai/) · 💼 [LinkedIn](https://www.linkedin.com/company/promptrails)