Elasticsearch vs OpenSearch (2026): Search Engine Compared

By ToolVS Editorial · Updated April 10, 2026 · 10 min read

Quick Verdict:Elasticsearch wins on feature depth, ML capabilities, and a more mature ecosystem. OpenSearch wins for AWS-native deployments, Apache 2.0 licensing, and avoiding Elastic's SSPL restrictions. Both are excellent — your cloud provider and licensing needs often decide.

MORE FEATURES

Elasticsearch

Best Feature Depth & ML Integration

Most mature search ecosystem
Elastic ML (anomaly detection, NLP)
Kibana — powerful visualization UI
Elastic Security and Observability built-in

SSPL license (not true open source)
Elastic Cloud can be expensive

Pricing: Self-host free / Elastic Cloud from $95/mo

Try Elasticsearch →

AWS-NATIVE

OpenSearch

Best for AWS & Apache 2.0 Licensing

Apache 2.0 license (truly open source)
Native AWS integration (IAM, VPC, CloudWatch)
OpenSearch Dashboards (Kibana fork)
Growing feature parity

Behind Elasticsearch on ML features
Smaller community outside AWS

Pricing: Self-host free / AWS from $0.10/hour

Try OpenSearch →

Score Breakdown

Elasticsearch7/12

OpenSearch5/12

Full Comparison Table

Category	Elasticsearch	OpenSearch
License	SSPL (proprietary-ish)	Apache 2.0 (open source)
ML Features	⭐⭐⭐⭐⭐ Elastic ML	⭐⭐⭐ Growing
Kibana / Dashboard	Kibana (full)	OpenSearch Dashboards
AWS Integration	Third-party	✅ Native (IAM, VPC)
Vector Search	✅ ES\|QL + k-NN	✅ k-NN plugin
Security Features	X-Pack (paid tiers)	Security built-in free
Alerting	Paid tiers	✅ Free
Community	Large, established	Growing (AWS-backed)
API Compatibility	Original API	Compatible with ES 7.10
Performance	Similar at scale	Similar at scale
Managed Cloud	Elastic Cloud	Amazon OpenSearch Service
Self-host Ease	Moderate	Moderate

Regret Index

Which do you use?

Elasticsearch — richer features

OpenSearch — AWS-native, Apache 2.0

Who Should Choose What?

Choose Elasticsearch if: You need the most advanced ML features (anomaly detection, NLP, semantic search), or you're building a security/observability platform leveraging the full Elastic Stack (ELK).

Choose OpenSearch if: You're on AWS and want native IAM, VPC, and CloudWatch integration, or you need Apache 2.0 licensing for compliance reasons. Also good for teams migrating from Elasticsearch 7.x.

FAQs

Is OpenSearch as good as Elasticsearch?

OpenSearch is based on Elasticsearch 7.10 and has added many features since. For most use cases they are comparable. Elasticsearch has more advanced ML features; OpenSearch has better AWS integration.

Why did AWS create OpenSearch?

Elastic changed the Elasticsearch license from Apache 2.0 to SSPL in 2021, making it no longer truly open source. AWS forked Elasticsearch 7.10 to create OpenSearch under Apache 2.0 license.

Which is cheaper: Elastic Cloud or Amazon OpenSearch?

Amazon OpenSearch Service is generally cheaper for AWS-heavy shops since it integrates with AWS billing. Elastic Cloud can be more expensive but offers multi-cloud and more features. Both have free tiers.

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Methodology: Scores reflect hands-on testing, community sentiment, and public documentation as of April 2026. We do not accept payment for rankings.

Choose the right search engine for your stack.

Try Elasticsearch →Try OpenSearch →

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Last updated: April 10, 2026