RonDB vs Upstash Redis

RonDB is an open-source distributed storage engine for real-time applications and a fork of MySQL NDB Cluster. Its shared-nothing design supports up to 1 PiB of storage, with online horizontal and vertical scaling for storage and MySQL-server compute. Applications can use the MySQL Server API for SQL-compatible access and parallel queries. ACID transactions are provided through MySQL-server support; in-memory data is persisted using REDO logs and checkpoints.

RonDB describes its performance aims as low latency, high availability, high throughput, and scalable storage. It supports AI application storage integrated with Spark and Kafka, while Rondis implements a Redis server using RonDB storage and the Redis wire protocol. Deployment options include local testing, Docker, cloud deployments using your own AWS, Azure, or GCP credentials, and on-premises deployment by inquiry. Replication can be synchronous active-active across availability zones or asynchronous across regions with conflict resolution. RonDB is used as the online feature-store database for machine-learning applications in Hopsworks. The serverless plan through Hopsworks is free, with quotas on Feature Groups and memory usage.

Upstash Redis is a fully managed, serverless Redis database in the cloud, with durable storage and pay-per-request pricing. It accepts connections over HTTP REST and the standard Redis TCP protocol. Databases can be replicated across regions for low-latency reads near users; the product describes multi-zone replication, automatic failover and persistence through restarts and failures. Listed use cases include caching, rate limiting, queues and streams, session storage, search and AI agent memory. It supports the Redis client protocol through version 8.4 and adds Search and Vector command families. Any Redis client can connect, including clients for TypeScript, Python, Go and Java. A Vercel integration can create or connect databases and expose environment variables to Vercel projects. TLS is enabled by default and cannot be turned off. The Free plan provides 256 MB of data, 10 GB of monthly bandwidth and 500K monthly commands. Pay as You Go is billed at $0.20 per 100K commands; storage and bandwidth charges may also apply. Its headquarters are in California.