> How Elasticsearch handles personal data under GDPR, legal basis, log retention, EU hosting choices and practical security and compliance steps. > > Canonical: https://www.flowconsent.com/en/services/other/elasticsearch Other # Elasticsearch Unclassified · [Official website](https://www.elastic.co) Elasticsearch is an open source distributed search and analytics engine commonly used to index logs, application data and content for fast querying. [Block Elasticsearch until consent](https://app.flowconsent.com/auth/sign-up?utm_source=flowconsent.com\&utm_medium=referral\&utm_campaign=other) · [Scan my site](https://www.flowconsent.com/en/scan) At a glance - Category [Other](https://www.flowconsent.com/en/services/other) - Consent Unclassified - Prior consent Not required - Documented cookies 0 - Servers Variable (self hosted, Elastic Cloud or major cloud providers) Overview ## What does Elasticsearch do? ## **What is Elasticsearch** Elasticsearch is an open source distributed search and analytics engine built on Apache Lucene. It powers full text search, log analytics, observability dashboards and recommendation features. It is the heart of the Elastic Stack (ELK), used together with Kibana, Logstash and Beats. You can self host it or rely on Elastic Cloud, which deploys clusters on AWS, Google Cloud or Microsoft Azure. ## **What data Elasticsearch indexes** Elasticsearch indexes whatever your application sends. In typical setups this covers product catalogues, customer profiles, support tickets, page content, and large volumes of server, application and security logs (HTTP access logs, error stacks, audit trails). Logs often contain IP addresses, user IDs, request paths and sometimes free text from users, which qualifies as personal data. ## **GDPR and ePrivacy implications** Indexed personal data is subject to the GDPR like any other database. You must apply data minimisation, define retention (especially for logs, which often grow uncontrolled), grant access on a need to know basis, secure transport, and be able to respond to access and erasure requests at the index and document level. The ePrivacy Directive does not apply to Elasticsearch directly, only to the cookies your frontend may set. ## **Consent and legal basis** No browser consent is required to operate Elasticsearch. The legal basis is contract performance (Art. 6(1)(b) GDPR) when indexed data is needed to deliver the service, or legitimate interest (Art. 6(1)(f) GDPR) for security and operational logs. Sensitive content needs an Art. 9 GDPR basis. Search query logs that reveal user behaviour are often the most sensitive part of an Elasticsearch deployment. ## **Data transfers and hosting** Self hosting Elasticsearch in an EU datacenter keeps everything in the EU. Elastic Cloud regions in Frankfurt, Paris, Ireland, Stockholm or Amsterdam host the data in the EU, but the cloud underneath (AWS, Google Cloud, Azure) is operated by a US provider. Document the transfer mechanism (EU US Data Privacy Framework or Standard Contractual Clauses) and run a transfer impact assessment for sensitive workloads. ## **Practical compliance steps** Enable the Elasticsearch security stack: authentication, role based access control, TLS everywhere, audit logging. Use index lifecycle management (ILM) policies to age out logs after a defined retention. Pseudonymise user identifiers, scrub free text fields when not strictly needed, mask sensitive fields with field level security, and never expose Elasticsearch directly to the internet. Document the cluster in your records of processing activities. Compliance ## Elasticsearch and the GDPR - Legal basis Contract performance (Art. 6(1)(b) GDPR) or legitimate interest (Art. 6(1)(f) GDPR), depending on what is indexed - Risk level medium - Applicable regulations GDPR; ePrivacy only when application logs include data placed via cookies ### Impact assessment (DPIA) A DPIA is recommended when Elasticsearch indexes large volumes of personal data, sensitive categories (health, biometrics), or feeds analytics and profiling. Pseudonymisation, field level security and retention policies materially lower the risk. ### Sample text for your banner > No browser consent is required because Elasticsearch runs server side. In your privacy policy disclose that you index application data and logs, list the categories of personal data, the retention period and the hosting region. Cookies and trackers ## What Elasticsearch sets and contacts - Tracking method Server side distributed search and analytics engine - Server location Variable (self hosted, Elastic Cloud or major cloud providers) - Cookieless mode available Yes Questions ## Frequently asked questions about Elasticsearch Can't find your question? Write to us, we answer fast. [Write to us](https://www.flowconsent.com/en/demo) ### Does Elasticsearch set cookies? No. Elasticsearch is server side; it never communicates with the browser. Kibana, when reachable through a browser, sets its own session cookies, which are technical cookies. ### Is consent required to use Elasticsearch? Browser consent is not required. As long as the data indexed is necessary to provide your service, contract performance or legitimate interest covers the processing. ### Which GDPR legal basis applies? Contract performance for indexed business data needed to deliver the service, legitimate interest for security and operational logs. Sensitive data requires an Art. 9 GDPR basis. ### Are there transfers to the United States? Elastic Cloud regions in the EU keep data in the EU, but the cloud provider is US headquartered. Cover the transfer with the EU US Data Privacy Framework or Standard Contractual Clauses and a transfer impact assessment. ### Do I need a DPIA? A DPIA is recommended when Elasticsearch indexes large volumes of personal data, sensitive categories, or feeds profiling and analytics. Generic full text search on product catalogues usually does not require one. ### How do I deploy Elasticsearch compliantly? Turn on authentication and TLS, apply RBAC, use ILM to enforce log retention, pseudonymise identifiers, mask sensitive fields, never expose the cluster directly, and audit administrative actions. ### Are there alternatives to Elasticsearch? OpenSearch is a community fork maintained by the Linux Foundation. Other options include Meilisearch, Typesense, Apache Solr and managed services from European providers such as Algolia (FR) or Sajari. ### How do I update my cookie policy for Elasticsearch? Elasticsearch itself does not belong in the cookie policy. Cover the indexed data in your privacy policy, including categories, legal basis, retention and hosting region. 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