5 Quant Trading Repos — Tier List

Ranks five open-source quant trading repos from S to D tier (NautilusTrader, HftBacktest, Kalshi Market Making, VectorBT, TensorTrade). Each one comes with what to check before you pip install it, like licenses, stale commits, and default zero fees and slippage.

By Felipe Sinisterra · October 26, 2026