S2 blog · Apr 2026
Introduced client-supplied encryption keys for durable streams, letting teams control key material without changing record APIs.
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Overview
S2.dev (also branded Stream Store) is a San Francisco-based developer infrastructure company building a serverless API for unlimited, durable, real-time streams—an S3-like storage primitive for data in motion, with replay, tailing, access control, and self-hostable/open-source components. Public sources disagree on the founding year (company/profile sources point to 2023; YC lists 2024), so I used 2023 here.
Primary product
Serverless API for durable, real-time streams
Founded
2023
Headquarters
San Francisco, California, United States
Team size
1-10 employees
Industry
Technology, Information and Internet
Sub-industry
Streaming data infrastructure / developer tools
Offices
San Francisco, California, United States
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