Amazon QLDB is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log owned by a central trusted authority. Amazon QLDB tracks each and every application data change and maintains a complete and verifiable history of changes over time.
Scylla is an open source drop-in replacement for Apache Cassandra with scale-up performance of 1,000,000 IOPS per node, scale-out to hundreds of nodes and 99% latency of < 1msec. Available as a managed service (Scylla Cloud), on popular cloud providers or on-prem
Amazon QLDB is ranked 15th in NoSQL Databases while Scylla is ranked 9th in NoSQL Databases. Amazon QLDB is rated 0.0, while Scylla is rated 0.0. On the other hand, Amazon QLDB is most compared with MongoDB and Oracle NoSQL, whereas Scylla is most compared with MongoDB, Couchbase, Aerospike Database, Apache HBase and Cassandra.
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