OpenSearch vs Elasticsearch
OpenSearch against Elasticsearch for self-hosted search and logs: Apache-2.0 against ELv2, SSPL or AGPL, shared 7.10 roots and where the APIs have since diverged, release support windows, and migration both ways.
OpenSearch
Comparisons anchored on OpenSearch, the Apache-2.0 search and analytics engine forked from Elasticsearch 7.10, as a log and SIEM backend.
OpenSearch vs Grafana Loki
Full-text indexed logs in OpenSearch against label-indexed logs in Loki on object storage: query power against storage cost, Apache-2.0 against AGPLv3, authentication, retention and which fits security logging.
OpenSearch vs Elasticsearch licensing
What each license allows: OpenSearch under Apache-2.0 against Elastic's ELv2, SSPL and the AGPLv3 option added in 2024, including managed service restrictions and what this means for vendors and internal platforms.
OpenSearch vs Elasticsearch security features
Which security controls come free: OpenSearch Security's SAML, OIDC, LDAP, document and field level security and audit logs against Elastic's Basic tier and the features it reserves for paid subscriptions.
OpenSearch Kubernetes operator vs Helm charts vs VM installs
Three documented ways to run a self-managed OpenSearch cluster: the OpenSearch Kubernetes Operator, the community Helm charts, or Debian, RPM, tarball and Ansible installs on virtual machines. Covers what the operator automates (node pools, rolling upgrades, TLS), what the charts leave to you, host tuning on VMs and which model suits a team without Kubernetes skills.
OpenSearch vs ClickHouse for logs
A full-text search engine against a columnar analytical database as the store for security and application logs: query model, storage engine, licensing (both Apache-2.0) and the operational trade-offs of each for log analytics.
