Searchanise Search & Filter

Searchanise fills the gaps that Shopify can't or won't. We use them because Search & Discovery won't allow filtering of as many products as we have in some collections. They also do 60 day best selling, so your sort order isn't locked into prioritizing some product that you blew out two years ago. They have so many features, and so many options to optimize.
The fact is, if you need features beyond Search & Discovery you end up needing a service like Searchanise. Many of these are egregiously expensive or a huge drag on performance. Searchanise is neither. Their core app is really easy on performance. Their biggest performance drawback is a reliance on jquery, which usually takes longer to load than their app. Overall though, they try hard and provide incredibly responsive support. They help you work through issues and provide support to your developers for customizations. Shout out to Ksenya for helping us fix some of our more persistent issues. The impression I get is that the Searchanise team is always improving, and in this with us when it comes to plugging the gaps in Shopify's capabilities.

Searchanise support was very quick to help me with my issues. 10/10 would work with them again.

The customer service team is quick to respond and very helpful. We encountered a couple of bugs and they promptly escalated the issues to their developers, who worked on resolving them for us.