Finnhub
Financial data API providing real-time stock quotes, fundamental data, earnings, news, and alternative data (insider trading, ESG scores) via REST and WebSocket, with a generous free tier.
Best When
You want a generous free tier with WebSocket support for real-time data, plus decent fundamental and alternative data coverage — good for prototyping and medium-scale production use.
Avoid When
You need institutional-grade data quality guarantees, options data, or fixed income coverage.
Use Cases
- • Real-time stock price monitoring via WebSocket for event-driven financial agents
- • Earnings calendar and earnings surprise data for trading strategy automation
- • Company news and sentiment analysis for fundamental research agents
- • Insider trading and institutional ownership data for alternative data signals
- • Crypto exchange rates and OHLCV data for multi-asset portfolio agents
Not For
- • Options chains and derivatives data (limited coverage)
- • Ultra-low latency HFT trading (not a direct market feed)
- • Fixed income and bond data
- • Global macroeconomic datasets at depth (use Quandl/NASDAQ Data Link)
Alternatives
Full Evaluation Report
Comprehensive deep-dive: security analysis, reliability audit, agent experience review, cost modeling, competitive positioning, and improvement roadmap for Finnhub.
AI-powered analysis · PDF + markdown · Delivered within 30 minutes
Package Brief
Quick verdict, integration guide, cost projections, gotchas with workarounds, and alternatives comparison.
Delivered within 10 minutes
Score Monitoring
Get alerted when this package's AF, security, or reliability scores change significantly. Stay ahead of regressions.
Continuous monitoring
Scores are editorial opinions as of 2026-03-01.