Self-hosted / open sourceAI SecurityHeadquarters: US

LLM Guard (Protect AI): sovereignty score and 8 European alternatives

LLM Guard is an open-source security toolkit for interactions with language models, developed by Protect AI. It provides scanners for inputs (prompts) and outputs (responses), including against prompt injection, for anonymising sensitive data, detecting secrets, recognising harmful language and preventing data leakage. The toolkit is installed as a Python package, can be integrated into an application or run as an API service, and is licensed under the MIT licence. It is a library rather than a hosted service, so you run it in your own environment.

Protect AI is based in Seattle (United States). Palo Alto Networks announced in 2025 that it would acquire Protect AI. The GitHub repository is archived and read-only, and the page states that the project and its Hugging Face models are no longer under active development or maintained. Because the code runs in your own environment, prompts and responses need not reach the vendor, but you must arrange security updates or an alternative yourself.

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Sovereignty score

69 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-3100
No hosting in Europe (self-hosted)
Cryptographic key sovereignty SOV-390
Self-hostable: encryption keys under your own control
Freedom from lock-in SOV-680
Open source: low switching costs
Source & runtime sovereignty SOV-4 · SOV-665
Source code auditable, forkable and self-hostable

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 6, 2026

Headquarters	US (US)Verified by hand
Ultimate parent company	USVerified by hand
EU adequacy decision	Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model	Open-source, distributedVerified by hand
Data hosting	self-hostedVerified by hand
Open-source	YesVerified by hand
GDPR-compliant	YesVendor-stated
Category	AI Security
Type	Product
Website	github.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to LLM Guard (Protect AI)

The European alternatives to LLM Guard (Protect AI) come from our knowledge base of over 6,800 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

12 European AI Security vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

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Why digital sovereignty matters with LLM Guard (Protect AI)

LLM Guard (Protect AI) is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

LLM Guard (Protect AI) hosts data outside the EU (self-hosted). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

LLM Guard (Protect AI) is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs LLM Guard (Protect AI) together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to LLM Guard (Protect AI)?

It depends on your use case. Strong EU alternatives to LLM Guard (Protect AI) include 2021.AI GRACE, CalypsoAI and Giskard. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to LLM Guard (Protect AI)?

Yes. Open-source EU alternatives to LLM Guard (Protect AI) include Giskard and Mistral Shieldstral. These keep your data fully under your own control and let you self-host if you want to.

Is LLM Guard (Protect AI) GDPR-compliant and where is the data hosted?

LLM Guard (Protect AI) is headquartered in US and hosts data in self-hosted. The vendor states it is GDPR-compliant, but the data falls under non-EU jurisdiction. For full EU data residency the EU alternatives on this page usually offer more certainty.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 6, 2026.

Sources

Public sources used in the latest check of this record.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

Digital sovereignty in AI Security

AI Security: Security for AI/LLM systems — prompt-injection detection, AI red-teaming, agentic security posture management and AI governance guardrails. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

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