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Z.ai (Zhipu AI)

How safe is GLM (Z.ai) for cybersecurity?

GDPR profileOur summary of what the provider itself publishes about your data: EU hosting possible, no training on your data for business use, and self-hosting available. Caution is given to a model with a documented issue, such as an investigation by a regulator. How we measure for cybersecurityCaution

GLM (Z.ai) raises a concrete GDPR concern. Parent company Zhipu (Beijing) falls under Chinese data and security law, regardless of where the servers are located. For sensitive data, self-hosting the MIT-licensed weights is the recommended mitigation. Weigh this heavily before using it in cybersecurity.

Where does GLM (Z.ai) stand on cybersecurity?

Shared place 19 of 25 options for cybersecurity (professional tools and general assistants) on GDPR profile. 7 options, like GLM (Z.ai), have a caution. Each tile is an option we follow for this field; click to check.

Strong5
Good7
Limited1
Unknown5
Caution7

Published safeguards

–EU hosting possibleNot known
–No training on your data (business)Not known
✓Self-hostable (on-premise)Yes

The international service Z.ai runs through JINGSHENG HENGXING TECHNOLOGY PTE. LTD. (Singapore); personal data is in principle processed in Singapore. According to the data processing agreement, API content is processed in real time and not stored. GLM-5.2 is open-weight under MIT and can therefore be fully self-hosted or hosted through an EU provider.

How to use GLM (Z.ai) safely

  • Use the business variant and sign a data processing agreement (DPA).
  • Do not enter unnecessary personal data into prompts; anonymise where possible.
  • Ask the provider explicitly where data is stored and processed.
  • Keep a professional in the loop: a security tool sees everything: log files, emails, usernames and network traffic.

Stronger or equally strong in cybersecurity

SoSafeSoSafe SE (Cologne, Germany)Aikido SecurityAikido Security BV (Ghent, BE)Eye SecurityEye Security (The Hague, Netherlands)HadrianHadrian Security B.V. (Amsterdam, Netherlands)SekoiaSekoia (Rennes, France)

Latest developments

26 October 2026Cloudflare Workers AI: GLM-5.3 leaked 155 answers between customers

Cloudflare reported that GLM-5.3 on Workers AI (@cf/zai-org/glm-5.3) returned data from other customers' requests in 27 answers between 9 August and 2026 September 155. Only prompts above 681,280 tokens were affected; the cause was a KV cache that was too small in the hosting configuration, not the model itself. Cloudflare found no evidence of misuse and fixed it on 9 September. If you used very long prompts containing personal data via Workers AI in that period, assess whether a data breach has occurred. source

Questions

How safe is GLM (Z.ai) for cybersecurity?
GLM (Z.ai) has a concrete GDPR point of attention. Parent company Zhipu (Beijing) falls under Chinese data and security law, regardless of where the servers are located. For sensitive data, self-hosting the MIT-licensed weights is the recommended mitigation. Weigh this heavily before using it in cybersecurity. There is a concrete GDPR point of attention, read the details on the page.
Does GLM (Z.ai) train on my data?
The international service Z.ai runs through JINGSHENG HENGXING TECHNOLOGY PTE. LTD. (Singapore); personal data is in principle processed in Singapore. According to the data processing agreement, API content is processed in real time and not stored. GLM-5.2 is open-weight under MIT and can therefore be fully self-hosted or hosted through an EU provider.
What should I watch out for with AI in cybersecurity?
A security tool sees everything: log files, emails, usernames and network traffic. That is personal data, so you need a data processing agreement and must know where the data is stored. Also ask whether the AI assistant is trained on your data. WithSecure (Finland) says it processes data for Luminen in AWS in Europe and does not train foundation models on customer data. Sekoia stores data in Germany or elsewhere in the EU/EEA and is ISO 27001 certified. SoSafe (France) can run self-hosted. With Microsoft Security Copilot you choose the geo of your workspace, but sharing data with Microsoft is on by default. For Charlotte AI, ESET LiveAI and Mindgard the hosting location is not public. Never let an agent act on production systems without analyst approval, and record who makes the 24-hour report under the Cybersecurity Act when an incident occurs.

Source documents

docs.z.aiz.aidocs.z.ai

Everything about GLM (Z.ai) Best AI for cybersecurity

Summarised by the editorial team from provider documentation · not legal advice

Last checked: 1 November 2026 · How we check

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