Redis vs Memorystore: Key Differences in 2026

This post details the comparison between Redis and Google Cloud's Memorystore, highlighting key differences in engine versions (Redis 8.x vs. Memorystore's frozen Redis 7.2 and Valkey 9.0), feature sets (vector search, hybrid search, semantic caching, context engine for agents, JSON, time series, probabilistic structures), persistence (hybrid AOF+RDB vs. RDB only or AOF/RDB not both), deployment options (multi-cloud vs. Google Cloud only), and operational control (full vs. locked parameters). It emphasizes that Memorystore is optimized for caching and session storage within Google Cloud, while Redis is a unified real-time data platform suitable for AI workloads, mixed workloads, and multi-cloud environments. The post also discusses the impact of the 2024 license change on Google Cloud's adoption of Valkey and the divergence in roadmaps.