* License preference: Some people prefer true open-source licenses as opposed to the license that Elasticsearch has switched to.
* Performance and resource consumption: For some, performance and resource consumption are significant factors in their choice of a search engine.
* SQL vs JSON DSL: Some people prefer using SQL over Elasticsearch's JSON domain-specific language.
* Maintenance: Some believe that maintaining Elasticsearch can become challenging when the data collection becomes large enough.
That's what I've heard from those who preferred Manticore over Elasticsearch.
Those people can also use OpenSearch, which is a recent fork of ElasticSearch (by Amazon) that is using the Apache 2.0 license.
* License preference: Some people prefer true open-source licenses as opposed to the license that Elasticsearch has switched to.
* Performance and resource consumption: For some, performance and resource consumption are significant factors in their choice of a search engine.
* SQL vs JSON DSL: Some people prefer using SQL over Elasticsearch's JSON domain-specific language.
* Maintenance: Some believe that maintaining Elasticsearch can become challenging when the data collection becomes large enough.
That's what I've heard from those who preferred Manticore over Elasticsearch.