Best In-Memory Databases in 2025

Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Key Redis features:

Performance Data Structures Scalability Persistence

Open Source

The most intuitive platform to manage projects and teamwork.

Key monday.com features:

User-Friendly Interface Customization Collaboration Integrations

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Aerospike is a high-performing NoSQL database supporting high transaction volumes with low latency.

Key Aerospike features:

High Performance Scalability ACID Compliance Hybrid Storage

Open Source

Dragonfly - Scalable in-memory datastore made simple.

Open Source

Swarm City is a decentralized commerce platform.

Kx Systems has a high-performance vector database, kdb+, with a built-in programming language, q, that sets the standard for time-series analytics.

Key KX features:

High Performance q Programming Language Time-Series Data Handling Scalability

Clustering and highly scalable data distribution platform for Java.

Key Hazelcast features:

Scalability In-Memory Data Grid High Availability Ease of Use

High-performance, distributed memory object caching system.

Key memcached features:

High Performance Scalability Simplicity Open Source

Open Source

SAP HANA is an in-memory, column-oriented, relational database management system.

Key SAP HANA features:

High Performance Real-Time Analytics Scalability Advanced Data Processing

Database for real-time transactions and analytics.

Key MemSQL features:

Performance Scalability SQL Compatibility Operational Simplicity

KeyDB is fast NoSQL database with full compatibility for Redis APIs, clients, and modules.

Key KeyDB features:

High Performance Redis Compatibility Active Replication Built-in TLS

eRAG: Take the GenAI leap with your operational data: Know more. Act faster. Better business outcomes. .

In-memory JavaScript Datastore with Persistence.

Key LokiJS features:

In-Memory Storage Lightweight NoSQL Document Store Persistence Options

clientDB is an open source in-memory database for enabling real-time web apps.

Key clientdb features:

Ease of Use Customization Integrated Communication Scalability

Open Source