Finqual – Free SEC-based API for fundamentals, insider and 13F data
Clean SEC data API, but Bloomberg Terminal, FactSet, Alpaca, and yfinance already dominate this category.

Aggregates 13F, insider, and congressional trades with a cleaner UI than Dataroma.
Retail investors, finance analysts
Dataroma · WhaleWisdom · Quiver Quantitative
Clean SEC data API, but Bloomberg Terminal, FactSet, Alpaca, and yfinance already dominate this category.
Form 4 insider trading backtester with Alpaca paper trading integration.
30-second latency on SEC filings beats the usual batch delays by miles.
Insider transaction alerts from SEC Form 4, but retail trading signal detection is crowded.
14-component confidence score filters 214 daily filings down to the 5-10 that matter.
Institutional holdings scraper; FactSet and Bloomberg terminals already own this.