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ScyllaDB

High-performance NoSQL database compatible with Cassandra and DynamoDB APIs, self-hosted or as a managed cloud.

Free plan + paidSelf-hostableBackend and database platforms
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About ScyllaDB

ScyllaDB is a wide-column NoSQL database written in C++ that implements the Apache Cassandra query language and drivers, plus a DynamoDB-compatible API called Alternator. Its shard-per-core design aims to squeeze more throughput out of each server, so the vendor's case studies (Discord among them) describe replacing large Cassandra clusters with far fewer nodes. It is aimed at teams with latency-sensitive, high-volume workloads such as feature stores, messaging and real-time analytics, and it has added vector search for AI use cases. ScyllaDB is source-available rather than open source: the self-managed edition is free up to a storage and vCPU limit across your clusters, and larger deployments need a paid licence. ScyllaDB X Cloud is the fully managed service on AWS and Google Cloud, with a free trial. It runs on Linux servers, in Kubernetes or as the hosted service.

Best for: Teams running Cassandra or DynamoDB workloads who want lower latency and fewer servers.

Pros and cons

What works

  • Drop-in CQL and DynamoDB API compatibility
  • Fewer nodes needed for the same load, per vendor benchmarks
  • Managed cloud option on AWS and Google Cloud
  • Free self-managed tier for smaller clusters

Why people leave

  • Source-available licence, no longer open source
  • Free self-managed use is capped by storage and vCPUs
  • Same query-first data modelling limits as Cassandra

Top ScyllaDB alternatives

See all 5
  1. 1Apache Cassandra logo
    Apache Cassandra

    The fully open-source original under Apache 2.0, with the same CQL model and no usage caps.

    66.5
  2. 2Amazon DynamoDB logo
    Amazon DynamoDB

    Serverless and fully managed on AWS, with no instances to size, at the cost of per-request pricing.

    64.8
  3. 3Azure Cosmos DB logo
    Azure Cosmos DB

    Managed multi-model database on Azure with a Cassandra-compatible API and global distribution.

    61.8
  4. 4Aiven logo
    Aiven

    Hosts open-source Cassandra and other databases across clouds, if you want managed without a source-available licence.

    59.4
  5. 5MongoDB Atlas logo
    MongoDB Atlas

    Managed document database with richer ad-hoc queries, for workloads that do not need wide-column scale.

    57.5

Why people left ScyllaDB

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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ScyllaDB: common questions

Is ScyllaDB free?

ScyllaDB has a free plan and paid plans.

Is ScyllaDB open source?

No, ScyllaDB is not open source. Open-source alternatives include Apache Cassandra.

What platforms does ScyllaDB run on?

ScyllaDB is available for Web, Linux and Self-hosted.

What are the best alternatives to ScyllaDB?

The highest-ranked ScyllaDB alternatives right now are Apache Cassandra, Amazon DynamoDB and Azure Cosmos DB. See the full ranked list for pricing, platforms and verified facts.

See all 5 ScyllaDB alternatives