Scylla

Performance
How fast the database performs under data load
Category average: 9.2
Availability
Availability is the probability that the NoSQL database will be available to preform its function when called upon.
Category average: 8.9
Concurrency
Concurrency is the ability for multiple processes to access or change shared data simultaneously. The greater the number of concurrent user processes that can execute without blocking each other, the greater the concurrency of the database system.
Category average: 9

Data model flexibility
NoSQL databases do not rely on rely on tables, columns, rows, or schemas to organize and retrieve data, but use use more flexible data models to accommodate the large volume and variety of data being generated by modern applications.
Category average: 9