Opensolr vs AWS OpenSearch — Stay on Apache Solr

AWS OpenSearch

AWS OpenSearch Service runs OpenSearch, a different engine from Solr. Moving a Solr application there means rewriting its schema, configuration, queries and client code. Opensolr keeps you on Apache Solr and adds site search on top.

On OpensolrOn AWS OpenSearchSchemaKeepschema.xmlRewriteJSON mappingsConfigurationKeepsolrconfig.xmlRewriteindex settingsQueriesKeepSolr syntaxRewriteQuery DSLClient codeKeepSolr clientsRewritenew clientsOpensolrOpenSearchSchemaKeepschema.xmlRewriteJSON mappingsConfigurationKeepsolrconfig.xmlRewriteindex settingsQueriesKeepSolr syntaxRewriteQuery DSLClient codeKeepSolr clientsRewritenew clients

Moving an existing Solr application: what you keep and what you rewrite.

01 · Side by side

 
Opensolr
AWS OpenSearch
Engine
Opensolr: Apache Solr.
AWS OpenSearch: OpenSearch, or legacy Elasticsearch up to 7.10.
Configuration
Opensolr: schema.xml and solrconfig.xml, edited in the browser or uploaded as a ZIP.
AWS OpenSearch: Mappings and index settings through the REST API, in JSON.
Queries
Opensolr: Solr syntax and eDismax.
AWS OpenSearch: OpenSearch Query DSL, in JSON.
Access
Opensolr: A username and password on every index, plus IP rules per request handler.
AWS OpenSearch: IAM, VPC and fine-grained access control by index, document and field.
Meaning vectors
Opensolr: Made for you for every page and record.
AWS OpenSearch: You connect an embedding model through ML connectors.
The bill
Opensolr: One plan price. Every plan includes 500 AI requests a month.
AWS OpenSearch: Instance hours, storage and data transfer.

02 · IP rules per request handler

A common setup: all on /select, so every visitor can search, and your server’s address on /, so only your server can write. You set them in the Security tab of the index: Choose who can reach your index.

03 · Also part of Opensolr site search

Crawling your site, a hosted search page, hybrid search, AI Hints, AI Reader, the chat bot, search by image, text read from scans, facets, Query Elevation, Search Tuning and search analytics. One page each: Enterprise Site Search, all in one.

04 · When AWS OpenSearch fits

Your stack already lives on AWS, your team works with the OpenSearch query model, and you want IAM, VPC and CloudWatch around your search.

Try it on your own data. Create a free account, see the plans on Pricing, or watch it work first: live demos and RAG in 60 seconds.

AWS details as published on aws.amazon.com on 10/11/2026. Check their site for current plans and prices.