Congressional stock trading trackers all read the same STOCK Act filings. They differ in what they do with them. Five options, honestly differentiated.
- Capitol Trades: the free lookup king: per-politician pages with a "filed after" delay column. No alerts or backtester.
- Quiver Quantitative: dashboards, strategy mirrors, and API access for the data-hungry.
- Unusual Whales: speed-first feed, best if you already live in its options world.
- OpenSecrets: the context layer: who the politician is, not just what they traded.
- InsiderPulse Pro (stockspro24.com): $12/mo puts congressional trades beside corporate insider buys in one schema.
Sources: [NexusTrade comparison](https://nexustrade.io/blog/nancy-pelosi-stock-trades-capitol-trades-vs-quiver-quantitative-vs-unusual-whales-vs-nexustrade-20260924)
Free lookup starts at Capitol Trades. If you mirror trades, Quiver's strategy tools matter. If you just want to know what one politician did, Capitol Trades answers in ten seconds. Everything else is about workflow.