RavenDB

RavenDB is a document database designed to be self-contained, with indexing, full-text search, distributed operation and administration tooling built into the product rather than assembled from separate services, and it publishes a direct comparison against MongoDB.

Including the surrounding capabilities is the distinguishing philosophy and it addresses a real accumulation problem. A team choosing a document database usually adds a search engine, a caching layer and a monitoring stack around it, and ends up operating four systems whose failure modes interact. A database with those capabilities native has fewer moving parts to keep in agreement.

Publishing a head-to-head comparison with MongoDB is a confident move and a useful one for buyers, because MongoDB is the default choice in this category and any alternative has to answer why it should be considered at all. A vendor willing to make that argument explicitly is easier to evaluate than one that pretends the comparison does not exist.

The developer material is substantial, with a developer hub, quick start guides, documentation, a bootcamp and workshops published openly. That matters for a database outside the default choice, since the practical barrier to adopting one is not capability but the availability of answers when something goes wrong at midnight. Rates are not published; RavenDB is quoted through sales.