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DDatabentoDatabento, Inc. · Market & fundamentals dataIn-depth entryUsage-priced market data platform with normalized order-book (MBO/MBP), trades, OHLCV and reference schemas for futures, options and equities, delivered via historical, live and batch APIs in the DBN formatMixedUsage-basedPaidNov 2, 2026
PPolarsPolars (Ritchie Vink and contributors) · DataFrames & array computingIn-depth entryRust-based DataFrame library with Python, Rust, Node and R bindings offering lazy query optimization, multithreading and Arrow-native memoryMITOpen sourceFreeLocalNov 2, 2026