Meilisearch is nice for tiny indexes, but it’s extremely slow at indexing and it’s not really comparable to elastic or manticore when it comes to larger datasets and requirements beyond the most basic use cases.
Good comparision. MeiliSearch's BucketSort and RAM consumption are the reasons I decided not to use MeiliSearch after testing it.
I just couldn't tweak ranking with BucketSort to get a desired relevancy. And memory usage was extremely high.
I didn't bother testing Manticore since there was no good open source client for C#, but seeing they released an official client I might test it to see how it compares to Solr.
Solr needs better documentation and community, but it's crazy fast, stable, and works well for what I do with search. It could also stand to have an improved UI to enable a better getting started experience and an easy means to index webpages out of the gate.
If anyone were to search for how to index a webpage with it, they'd get frustrated pretty quickly. I started a new version of Grub to address this, but I've found my motivation for working on it lacking: https://github.com/kordless/grub-2.0
A friend and I assembled a module for that repo called Aperture, which implements a scalable screenshot crawler that sends document into Solr. If anyone is interested, hit me up and I'll provide some instructions for using it!