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Hushbridge vs Microsoft Purview

Purview lets an IT team warn or block risky pastes into AI sites. Hushbridge swaps the details out so the prompt can still go.

Who it is for

Microsoft Purview

Platform feature

Purview is the data security and compliance suite in Microsoft 365. It is a set of platform controls, and AI redaction is not one of them. Endpoint data loss prevention can warn or block a user who pastes sensitive content into a third-party AI site. Microsoft gives the example of a user stopped from pasting credit card numbers into ChatGPT. Audit captures prompts and responses for supported AI apps. It fits IT and compliance teams that already run Microsoft 365 and manage their devices.

Hushbridge

Local protection layer

Hushbridge works where people already use AI. On your device it swaps details for placeholders such as [PERSON_1] and shows you what the AI will get. After you review it, the placeholder version goes to the AI. Real values come back on your device. The user can still finish the task with the details hidden from the AI. It fits professionals and developers who need the AI answer as well as the protection.

At a glance

Question	Microsoft Purview	Hushbridge
What it protects	Company data on managed devices and in Microsoft 365. Policies match sensitive information types or sensitivity labels.	Names, identifiers, addresses, secrets and anything on your own "always protect" list, in text you type or paste.
Where processing happens	On onboarded Windows and macOS devices, with policy evaluation in the Microsoft Purview service.	On your device.
Where original values are stored	Nothing is swapped, so there is nothing to store. When a paste is allowed, the original text goes to the AI site.	In a swap table that stays on your device.
Restore in replies	No. It allows, warns or blocks. It does not replace values with placeholders.	Yes. Real values return on your device in supported replies.
How you use it	Admins create an endpoint policy for "Paste to supported browsers" set to Audit, Block with override, or Block. Prompts and responses in supported AI apps are recorded in the unified audit log.	A browser extension for ChatGPT, Claude, Gemini, Copilot and Perplexity, a web workspace, or the SDK and local proxy in your own code.
Deployment	Devices must be onboarded to Microsoft Purview. Paste control works in Edge and Safari, and in Chrome and Firefox on Windows with the Purview extension.	Extension version 0.1.1 installs manually in Chrome with "Load unpacked". Workspace and billing run on tightlipai.com during the move to the new name.
Pricing	Not verified. Part of Microsoft licensing. A third-party guide says advanced AI protection often needs Microsoft 365 E5, Purview add-ons or pay-as-you-go features.	USD 0.05 per credit. Top-ups from USD 100. USD 20 free credit on sign-up (to be reconfirmed before launch). One credit covers each started block of 8,000 tokens.

Purview behaviour comes from Microsoft Learn pages. We did not set up a Purview tenant to test it.

Choose Microsoft Purview when

Your company already licenses Purview and onboards its Windows or Mac devices.
You want a central rule that stops certain data from reaching AI sites at all.
You need prompts and responses kept for audit, eDiscovery or retention.
You want the same policies to cover Microsoft 365 Copilot and other Microsoft AI apps.

Choose Hushbridge when

A block would stop the work, and you need the AI to help with the details swapped out.
You want the AI answer to come back with the real names in place.
You work on your own or in a small firm without managed devices.
You build your own AI feature and need an SDK or a local proxy.

Limits of each

Microsoft Purview

It does not swap values for placeholders, so a blocked paste means no AI help with that text.
Endpoint controls apply only to devices onboarded to Purview.
Chrome and Firefox paste control needs the Purview extension and is listed for Windows only.
Microsoft notes a short delay while a paste is classified.
ProArch notes Purview does not enforce its policies inside ChatGPT the way it does in Microsoft 365.

Hushbridge

Detection can miss a name with no context cues. The rest of the text can still point to a person.
The extension does not scan attachments.
A chat site's page can read text while you type it.
It has no admin console, audit log or retention controls.
You still need to review the text before you send it.

Sources

Microsoft Purview protections for Microsoft 365 Copilot and other AI apps (overview page) | Microsoft Learn. https://learn.microsoft.com/en-us/purview/ai-microsoft-purview. Checked 2026-10-15.
Learn about Endpoint data loss prevention | Microsoft Learn. https://learn.microsoft.com/en-us/purview/endpoint-dlp-learn-about. Checked 2026-10-15.
Help prevent leakage of sensitive content by restricting paste actions into browsers | Microsoft Learn. https://learn.microsoft.com/en-us/purview/endpoint-dlp-create-policy-restrict-paste-in-browsers. Checked 2026-10-15.
Can Microsoft Purview Protect Data in ChatGPT and Other AI Tools? | ProArch (22 Jun 2026). https://www.proarch.com/blog/microsoft-purview-chatgpt-ai-data-protection. Checked 2026-10-15.
Pricing | Tightlip (Hushbridge billing during the migration). https://tightlipai.com/pricing. Checked 2026-10-15.

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