Timescale: Time-Series DB based on Postgres: $unicorn

Why You Need A Time-Series Database – The Data Exchange

co-founders of Timescale,

with "protective" open source license that prevents cloud hosting

Timescale raised a massive funding round and achieved unicorn status

"PostgreSQL is the best foundation for software applications; and SQL is, and will continue to be, the universal language for data analysis."

timescale/timescaledb: An open-source time-series SQL database optimized for fast ingest and complex queries. Packaged as a PostgreSQL extension. @GitHub

• C74.2% 
• PLpgSQL19.9%
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