QuantConnect
Free plan
Open-source algorithmic trading platform with cloud backtesting and data.
Verdict. Best for coders building serious quant strategies in Python or C#.
Skyrexio
Crypto trading platform with an AI agent that builds and backtests bots from plain English.
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Best for crypto traders who want chat-built bots with approval before anything trades.
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Composer
Paid
Build, backtest and automate trading strategies with AI and no code.
Verdict. Best for turning a rules-based portfolio idea into an automated strategy without code.
TradersPost
Free plan
Connects TradingView alerts and webhooks to broker execution.
Verdict. Best bridge from TradingView alerts to automated orders. Start in paper mode.