When comparing ConcourseDB vs Couchbase, the Slant community recommends ConcourseDB for most people. In the question“What are the best self-hosted NoSQL distributed databases?” ConcourseDB is ranked 5th while Couchbase is ranked 6th. The most important reason people chose ConcourseDB is:
Concourse tracks versions of your data by default. This way you can easily edit data without being afraid of losing anything since Concourse can easily revert to a previous state.
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Pros
Pro Built-in version control
Concourse tracks versions of your data by default. This way you can easily edit data without being afraid of losing anything since Concourse can easily revert to a previous state.
Pro Fully ACID compliant
ConcourseDB is known to have a very holistic approach to robustness and data integrity which is reflected by it being fully ACID compliant.
ConcourseDB has always been strict about making sure data is valid before allowing it into the database, and there is no way for a client to bypass those checks.
Pro Can easily query data from any point in the past
Because of its powerful version control capabilities, Concourse can easily and painlessly query and get data from any point in the past.
Pro Open source
Couchbase and Couchbase Mobile are open source and released under the Apache License.
Pro Easy to implement N1QL queries
Pro Ability to run ad-hoc SQL like queries on realtime big data
Couchbase N1QL allows native SQL processing over JSON data with high performance indexing for low latency queries at scale.
Pro Easy sync protocol to mobile devices
The minimal code needed to pull data down to a device
Pro Available on Windows, Linux & macOS
Pro Ability to make predefined fast queries
With Couchbase you can make "Views" of data, which are practically predefined queries which are fetched with an O(1) algorithm.
Cons
Con Not very popular
Since ConcourseDB is not a very popular solution among developers, it may be hard to find libraries or SDKs to easily integrate it into any platform with which you are developing.
Con Vendor lock-in
Con No model mapper for Android
Couchbase does not have a model mapper for Android built-in and out of the box, instead you will have to write your own from scratch.
Con Not Compatible with couchdb
Since version 2 the sync-protocol is no longer compatible with couchdb. This makes couchbase nearly worthless
