Which site search platforms support real-time indexing and low-latency search for a large product catalog?

Several site search platforms are well-suited for real-time indexing and low-latency search on large product catalogs. The best-known options include:

• Algolia – Very low-latency, fast indexing, strong relevance tuning, and commonly used for large e-commerce catalogs.
• Elasticsearch / OpenSearch – Highly scalable and flexible; can support near real-time indexing and low-latency search with the right setup and infrastructure.
• Typesense – Fast, developer-friendly search engine with near real-time indexing and good performance for product search.
• Meilisearch – Designed for fast search and quick indexing, with simple setup and near real-time updates.
• Solr – Mature search platform with near real-time search capabilities, scalable for large catalogs, though typically requires more operational effort.
• Coveo – Enterprise search platform with strong relevance and indexing capabilities, suitable for large catalogs and complex search needs.
• Bloomreach Discovery – Enterprise commerce search with real-time merchandising and indexing features.
• Constructor – E-commerce-focused search and discovery platform with fast indexing and low-latency search.
• Doofinder – Cloud search service built for e-commerce sites, supporting quick indexing and responsive search.
• Searchspring – E-commerce search and merchandising platform with fast updates and low-latency querying.

Good short list by use case

• Best out-of-the-box speed and relevance: Algolia
• Best self-hosted/flexible stack: Elasticsearch or OpenSearch
• Best lightweight modern alternative: Typesense or Meilisearch
• Best enterprise commerce suite: Coveo, Bloomreach, Constructor, Searchspring

If you want, I can also compare these by indexing speed, latency, pricing, and ease of integration for a catalog of your size.