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KeyDB

Open Source

About KeyDB

KeyDB is a fully open source, multithreaded database designed to deliver high throughput and low latency for demanding workloads. It serves as a faster drop-in replacement for Redis, supporting a wide variety of data structures such as strings, hashes, lists, sets, sorted sets, bitmaps, hyperloglogs, geospatial indexes, and streams. KeyDB is suitable for enterprises needing scalable, reliable, and fast in-memory data storage solutions to enhance user experience across applications serving millions of users.

Built for scale, KeyDB supports vertical scaling on single nodes and horizontal scaling through active replication and cluster mode with sharded datasets. It offers multiple persistence options, high availability with active-replica failover without sentinel nodes, and advanced open source features like MVCC non-blocking architecture, cross-region multi-master support, and enhanced expiration handling. Its multithreaded design also enables TLS encryption at significantly higher throughput than Redis, making it suitable for secure enterprise deployments. KeyDB’s extensibility includes an open source JavaScript module for custom commands, appealing to organizations seeking flexible and performant database platforms.

How to evaluate Database Platforms

This is how the CIOPages Research Team evaluates this category. It is not an assessment of KeyDB. It comes from our Enterprise Database Platforms buyer guide.

25%
Data Model & Query Fit
Match of the engine to the workload: relational integrity and joins, document/JSON flexibility, key-value latency; transaction isolation levels and ACID guarantees; SQL standard coverage and dialect quirks; secondary indexes, full-text and vector (pgvector / Atlas Search) support; foreign keys and referential integrity where you need them
20%
Consistency, Scale & HA
Single-primary vs. multi-writer; synchronous vs. async replication and resulting RPO; read-replica and sharding story; horizontal write scale and global/multi-region behavior (strong vs. eventual consistency); failover time, achievable RTO, and how partitions are handled under load
20%
Operability & Managed-Service Experience
Quality of the managed offering (RDS/Aurora, Azure SQL, Cloud SQL/AlloyDB) vs. self-managed burden; in-place and major-version upgrade path; backup/PITR, observability, and connection pooling; autoscaling and serverless options; day-2 toil — vacuum/compaction, index bloat, rebalancing — and the depth of the DBA skills it demands
15%
Licensing & Portability
License class and its real constraints: OSI open source (PostgreSQL, MySQL, Valkey, Redis 8 AGPL) vs. source-available (MongoDB SSPL, CockroachDB enterprise/BSL) vs. proprietary (Oracle, SQL Server); cloud lock-in of proprietary engines (Aurora, Spanner, DynamoDB); wire-protocol and SQL-dialect compatibility that preserves an exit; audit exposure on proprietary metrics
12%
Security & Compliance
Encryption at rest and in transit, TLS enforcement, and key management (BYOK/HSM); row- and column-level security and fine-grained RBAC; field-level / queryable encryption for sensitive data; audit logging; data-residency controls and certifications (SOC 2, ISO 27001, HIPAA, PCI, FedRAMP) on the managed service
8%
Ecosystem & Talent
Driver and ORM maturity across your languages; migration and CDC tooling (logical replication, Debezium, DMS); breadth of extensions and integrations; size and hireability of the talent pool; quality of docs and the support path — first-party vendor vs. third-party (EDB, Percona, Crunchy) for open engines

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Quick Facts

docs.keydb.dev
CategoryData & Analytics
SubcategoryDatabase Platforms

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