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ArcadeDB vs Couchbase Server: catalog facts
ArcadeDB	Couchbase Server
Free Free and open source under the Apache 2.0 licence.	Freemium A community edition is available; enterprise and hosted options are sold by Couchbase.
Self-hosted	macOS, Self-hosted
Several data models in one ACID-compliant engine Supports SQL, Cypher, Gremlin, GraphQL and MongoDB queries	JSON documents queried with SQL++ In-memory architecture with built-in search and vector services
A database server rather than a desktop client; needs setup and administration Embedding is limited to Java applications	Aimed mainly at business deployments More complex to operate than a single-node database
Downloadable app, Self-hosted	Self-hosted
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.