3 tools
marimo (acquisition by CoreWeave announced October 2025) · Notebooks & interactive computing
Reactive Python notebook stored as a plain .py file that re-runs dependent cells automatically and doubles as a script or web app
Massive (Polygon.io, Inc.) · Market & fundamentals data
Market data platform (renamed from Polygon.io in October 2025) with REST and WebSocket APIs, flat files and SQL access for US stocks, options, indices, forex, crypto and futures
Tiger Data (formerly Timescale) · Relational databases
PostgreSQL extension for time-series data adding hypertables, compression and continuous aggregates, from the company now named Tiger Data
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