Rockset

Rockset was founded in 2016 in San Mateo, California, by three former Facebook (Meta) infrastructure engineers: CEO Venkat Venkataramani, CTO Dhruba Borthakur, and Tudor Bosman. Borthakur was the original creator of RocksDB, the embedded key-value storage engine open-sourced by Facebook that underpins databases across the industry, and Venkataramani led large-scale data infrastructure teams at Facebook; this RocksDB/Facebook lineage directly shaped Rockset's technical approach. The company built a cloud-native 'real-time analytics database' that used a proprietary 'converged index' (combining inverted/search, columnar, and document indexes, built on RocksDB internals) to let developers run fast SQL queries directly on raw, continuously updating JSON and semi-structured data from operational databases, streams (Kafka, Kinesis), and data lakes — without traditional ETL pipelines or schema-first data modeling.

Greylock Partners was Rockset's earliest and most consistent institutional backer: Greylock partner Jerry Chen led/co-led the company's seed investment around its 2016 founding and sat on Rockset's board from inception through the eventual acquisition. Rockset went on to raise roughly $105 million in venture funding across six rounds. Sequoia Capital publicly announced a partnership/investment in Rockset in November 2018 (widely understood to be its Series A), and the company later disclosed a $40 million round in October 2020. Its final, largest disclosed round was a $44 million raise announced in August 2023 ($37 million in equity plus $7 million in venture debt), led by Icon Ventures with participation from Glynn Capital, Four River Partners, K5 Global, and existing investors Sequoia Capital and Greylock; at that point the company had roughly 80 employees, growing toward about 100 by early 2024. Sequoia's Mike Vernal also served on Rockset's board.

On June 21, 2024, OpenAI announced it had acquired Rockset, its second publicly disclosed acquisition after Global Illumination in 2023. Reuters reported the deal was an all-stock transaction in the 'nine figures,' though neither company disclosed exact financial terms. OpenAI said Rockset's real-time indexing and retrieval technology would be folded into OpenAI's own infrastructure to improve retrieval-augmented generation, enterprise search, and ChatGPT's ability to ground responses in customers' own, continuously updating data — directly addressing hallucination and data-freshness challenges in AI applications. OpenAI COO Brad Lightcap said the goal was to bring these capabilities to OpenAI's products and customers. Rockset's engineering team joined OpenAI to work on retrieval infrastructure, and Greylock's Jerry Chen publicly congratulated the company, noting Rockset had 'positioned itself at the center of major technology transitions' from cloud-native infrastructure in 2016 to the AI-driven cloud era of 2024.

Business model

B2B SaaS / cloud database-as-a-service, consumption-based pricing for real-time indexing, storage, and compute ("virtual instances").

Usage-based cloud subscription (compute + storage consumption pricing) for its managed real-time analytics database service.