Redis is the company behind the world's most popular in-memory data store, the open-source database that began as a side project by Salvatore Sanfilippo in 2009 and now sits in the stack of most of the internet's largest applications. It sells managed and self-hosted enterprise versions - Redis Cloud and Redis Software - layered on the open-source core, and has pushed hard into real-time AI use cases like vector search and LLM memory. After a turbulent 2024 licensing fight that spawned the AWS-backed Valkey fork, Redis returned to an open-source license (AGPLv3) with Redis 8 in 2025.
Imply is a San Francisco-based data analytics company that built its platform on Apache Druid - the open-source real-time analytics database that its co-founders helped create. The company offers Imply Polaris, a fully managed cloud database-as-a-service for real-time analytics, and Imply Lumi, billed as the industry's first Observability Warehouse. With $215M in total funding and unicorn status at a $1.1B valuation, Imply serves 100+ enterprise customers including Atlassian, Reddit, and Cisco ThousandEyes, enabling sub-second query performance across terabytes to petabytes of streaming and historical data.
PingCAP is the company behind TiDB, an open-source, MySQL-compatible distributed SQL database built for hybrid transactional and analytical workloads. TiDB scales horizontally across cloud and on-prem deployments, and now powers AI agent workloads through TiDB X with built-in vector search.