Non-EU vendorCybersecurityHeadquarters: US

Zscaler: sovereignty score and 8 European alternatives

Zscaler provides cloud-delivered security for organisations. The platform is built around the Zero Trust Exchange, which securely connects users, locations and cloud environments to applications, and includes Zscaler Internet Access and a SASE offering. It covers threat protection, data protection and zero trust connectivity without requiring you to operate your own security appliances. The service is delivered as a cloud service.

Zscaler, Inc. is a US company listed on Nasdaq and headquartered in San Jose, California, so it is subject to US jurisdiction. According to Zscaler, it operates 25 data centres in Europe, 19 of them in the EU. Customers can restrict processing to the European infrastructure, and logs are stored in Europe by default and can be limited to the EU and Switzerland. A user who travels to the US is processed at the nearest data centre, though. Zscaler also offers, together with Schwarz Digits, a separate sovereign service on the STACKIT cloud, hosted in German data centres.

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

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Sovereignty score

27 / 1000 = high exposure
100 = sovereign

Jurisdiction SOV-210
Headquartered in the US: CLOUD Act and FISA 702
Data residency SOV-350
Hosting inside and outside Europe (US, EU)
Cryptographic key sovereignty SOV-320
Key management with a non-European vendor
Freedom from lock-in SOV-640
Closed source: switching requires data migration
Source & runtime sovereignty SOV-4 · SOV-615
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 September 20, 2026

Headquarters	US (US)Verified by hand
EU adequacy decision	Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model	Vendor-hosted (non-EU)Verified by hand
Data hosting	US, EUVerified by hand
Open-source	NoVerified by hand
GDPR-compliant	YesVendor-stated
Compliance documents	1 published, see belowVendor-stated
Hosting signal	CLOUDFLARENET - Cloudflare, Inc., US (US)Technically measured
Category	Cybersecurity
Type	Product
Website	zscaler.com ↗

The hosting signal shows the network that serves the vendor's website, often a CDN, and not necessarily where the service or your data is hosted. How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Zscaler

The European alternatives to Zscaler 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

93 European Cybersecurity 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 Zscaler

Zscaler 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.

Zscaler 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.

Zscaler 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 Zscaler 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 Zscaler?

It depends on your use case. Strong EU alternatives to Zscaler include NetBird, WireGuard and Stormshield. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Zscaler?

Yes. Open-source EU alternatives to Zscaler include NetBird and WireGuard. These keep your data fully under your own control and let you self-host if you want to.

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

Zscaler is headquartered in US and hosts data in US, EU. 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 September 20, 2026.

Sources

This record was checked via the vendor's website and legal notice when it was added on September 20, 2026. Source links have been recorded per record since 20 September 2026.

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".

Security page / trust center: zscaler.com/privacy-compliance/overview

Provenance of the links above:Vendor-stated

CSA STARConfirmed in registry

Links checked on September 21, 2026.

Cyber Resilience Act

Public signals that relate to the EU Cyber Resilience Act. They do not count towards the score. A missing line means "not found publicly".

Report a vulnerability: zscaler.com/security/vulnerability-disclosure-program

For products in scope of the CRA, CE marking is required from 11 December 2027; this cannot be checked yet.

Checked on October 9, 2026. What is the Cyber Resilience Act?

Digital sovereignty in Cybersecurity

Cybersecurity: Threat detection, endpoint protection, SIEM, vulnerability management. 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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