EU-hosted, non-EU parentAI SecurityHeadquarters: IE

CalypsoAI: sovereignty score and 8 European alternatives

CalypsoAI, founded in 2018, provides security for AI models and applications at the inference layer. Its platform covers protection against attacks such as prompt injection and jailbreaks, runtime guardrails for sensitive data, AI red-teaming, and centralised observability with audit logs. It works regardless of model or cloud. F5 announced in September 2025 that it would acquire CalypsoAI; the product is now offered as F5 AI Guardrails, and the calypsoai.com website redirects to that product page.

F5 is a US-listed company (NASDAQ: FFIV), while CalypsoAI has major operations in Dublin, Ireland. According to the vendor, F5 AI Guardrails can be deployed in the public cloud (AWS, Azure and Google Cloud), in a private cloud, or on-premises, including fully air-gapped environments. The product is not open source. Organisations that run it on their own infrastructure keep inspection and enforcement within their own boundaries; the owner, however, is subject to US jurisdiction. It is therefore worth confirming per deployment where data is processed.

See the 8 European alternatives ↓Assess your stack with CalypsoAI pre-selected

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Sovereignty score

59 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-2100
Headquartered in the EU: European law applies
Data residency SOV-350
Hosting inside and outside Europe (US, EU)
Cryptographic key sovereignty SOV-360
Key management with a European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-645
Closed source, runtime with the vendor

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 9, 2026

Headquarters	IE (EU)Verified by hand
Ultimate parent company	USVerified by hand
Sovereignty model	Vendor-hosted (EU)Verified by hand
Data hosting	US, EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Category	AI Security
Type	Product
Website	f5.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to CalypsoAI

The European alternatives to CalypsoAI 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 CalypsoAI

CalypsoAI is headquartered in IE and therefore falls under European law: the GDPR, NIS2 and the Data Act. No foreign legislation can compel access to your data. The ultimate owner is based in US. Foreign control undermines part of the certainty a European headquarters offers.

CalypsoAI hosts data in US, EU. Exactly what stays within the EU — and what does not — is defined by the vendor's data processing agreement and sub-processor list, not by a setting you control yourself; check those documents for the precise scope, including backups, logs and support access.

CalypsoAI is closed source and hosted by the vendor. The encryption keys and the runtime sit with the vendor and switching requires data migration. Ask about bring-your-own-key, export options and open standards.

What this means for your organisation depends on your whole stack and context. The free assessment weighs CalypsoAI 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 CalypsoAI?

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

Are there open-source alternatives to CalypsoAI?

Yes. Open-source EU alternatives to CalypsoAI include Giskard and Mistral Shieldstral. These keep your data fully under your own control and let you self-host if you want to.

Is CalypsoAI GDPR-compliant and where is the data hosted?

CalypsoAI is headquartered in IE (EU) and hosts data in US, EU. That makes CalypsoAI an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.

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 9, 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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