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FirstRate Data LLC · Market & fundamentals data

Vendor of historical intraday market data (1-minute to daily bars, tick and options) for US stocks, ETFs, futures, indices, crypto and FX, delivered as zipped CSV bundles under a perpetual licence

ProprietaryPaidAcademicNov 2, 2026

Massive (formerly Polygon.io)

Massive (Polygon.io, Inc.) · Market & fundamentals data

Market data platform (renamed from Polygon.io in October 2025) with REST and WebSocket APIs, flat files and SQL access for US stocks, options, indices, forex, crypto and futures

ProprietaryPaidEnterpriseNov 2, 2026

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FirstRate Data

Massive (formerly Polygon.io)