BalanceProof compared

What the API does, with a real response from it.

• XBRL balance sheet API for US public companies
• Free SEC fundamentals API: what the free key includes
• BalanceProof MCP server: SEC balance sheets for AI clients

BalanceProof against one other data source.

• BalanceProof vs Intrinio: SEC Filings API Comparison
• BalanceProof vs sec-api.io: Which SEC XBRL API Should You Use?
• BalanceProof vs Xignite: Financial Data API Comparison
• BalanceProof vs Financial Modeling Prep: SEC Balance Sheet Data
• BalanceProof vs Polygon.io: Fundamentals, and Where Polygon Went
• BalanceProof vs Alpha Vantage: SEC Fundamentals Compared
• BalanceProof vs Finnhub: SEC Fundamentals Compared
• BalanceProof vs EODHD: SEC Balance Sheets Compared
• BalanceProof vs Tiingo: Two Kinds of Data Quality
• BalanceProof vs Nasdaq Data Link: Fundamentals
• BalanceProof vs Financial Datasets AI: Sampling vs a Test on Each Filing

What to look for in a replacement for a named product.

• Intrinio Alternatives for SEC Balance Sheet Data
• Financial Modeling Prep Alternatives for SEC Balance Sheets
• Polygon.io Alternatives for SEC Fundamentals
• Alpha Vantage Alternatives for SEC Balance Sheets
• sec-api.io Alternatives: Filings, or the Figures Inside Them

What to test before you pick a filings or fundamentals API.

• The Best SEC Filings API for Quants: How to Actually Choose One
• The Best SEC XBRL API: What Actually Separates Them
• The Best Balance Sheet API: What to Test Before You Buy
• The Best Free Financial Statement API: Reading the Fine Print

The method behind every figure is on how we verify; the study that motivates it is why naive XBRL extraction is wrong 1 in 5 times; how many filings fail and why is in the report on 38,568 balance sheets.