Alpaca
Alpaca (AlpacaDB, Inc.) · Financial analysis & investing
API-first US brokerage offering a Trading API, Market Data API and Broker API for stocks, ETFs, options and crypto, with paper trading
Apache-2.0FreemiumUsage-basedNov 2, 2026
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Etherscan
Etherscan · Open & public data
Ethereum block explorer and multichain REST API exposing balances, transactions, token transfers, verified contract source, logs and gas data
ProprietaryFreemiumPaidNov 2, 2026
Geocodio
Dotsquare LLC (Geocodio) · GIS & mapping
Geocoding API and spreadsheet service for the US and Canada with batch processing and data appends such as census, districts and time zones
ProprietaryFreemiumUsage-basedNov 2, 2026
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