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Polygon.io offers streaming realtime data for stocks/equities, ETFs, Indecies and Forex/Currencies including crypto currencies. Our Real-Time Stock Data APIs help you build the future on fintech.

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Which is more popular?
Based on our record, Polygon.io seems to be more popular. It has been mentioned 85 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | polygon.io | dataprotocol.com |
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Get Stock Pricing Data From The Polygon.io API For Algo-Trading Using Python
Sven Mawson - Evolution of the Google Data Protocol
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Recommendations tracked on public social media and blogs since March 2021.


Polygon.io gives you 5 API calls/minute on the free tier. That’s rough for options scanning since you need one call per expiration per symbol. I’d only recommend this if you’re scanning fewer than 20 symbols. - Source: dev.to / 6 months ago
The market data will be streamed from polygon.io. All trades should be handled by the Game Engine, so in the simplest form, the architecture looks like this:. - Source: dev.to / about 1 year ago
Here are some valuable resources for developers exploring share price API solutions: Alpha Vantage API: A free platform offering extensive stock market data, including historical trends and real-time updates. Yahoo Finance API: A... - Source: dev.to / over 1 year ago
Tracking Data Protocol since Oct 2023.
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