OpenCorporates vs SEC API (sec-api.io) comparison

OpenCorporates focuses on Data APIs, Regulatory Filings Monitoring, and Other while SEC API (sec-api.io) specializes in Data APIs, Regulatory Filings Monitoring, and Insider Data. They overlap in 2 categories, so choose based on your preferred workflow and pricing.

Good news—both OpenCorporates and SEC API (sec-api.io) offer free plans. You can try each platform without commitment and only pay when you need premium features.

Yes, both platforms offer API access for developers and quants who want to build custom integrations or automate their workflows.

Choose OpenCorporates if you need 230M+ company records spanning 145+ jurisdictions, aggregated from 140+ official registries with full provenance and source links., and Versioned REST API with JSON (default) or XML output; API keys required. Free tier provides up to 200 requests per month (50 per day).. Go with SEC API (sec-api.io) if Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings., and Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN). better fits how you invest.

Both cover common asset types. OpenCorporates also includes Other. SEC API (sec-api.io) adds coverage for Stocks, ETFs, Mutual Funds, and Funds.

SEC API (sec-api.io) offers real-time data feeds, which is essential for active traders. OpenCorporates uses delayed or end-of-day data, which works fine for longer-term investors who don't need up-to-the-second quotes.

OpenCorporates supports data exports to CSV, and JSON. SEC API (sec-api.io) has more limited export options.