
Polygon.io
Twelve Data
Financial Modeling Prep
BloombergView
Finage
FinancialData.net
FinFeedAPI
Alpha Vantage offers free APIs in JSON and CSV formats for realtime and historical stock and forex data, digital/crypto currency data and over 50 technical indicators.

Extism
OpenCL
Add design patterns to C# and VB without boilerplate code with PostSharp. Choose from ready-made design patterns for C# and VB or create your own.

Which is more popular?
Based on our record, Alpha Vantage seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | alphavantage.co | postsharp.net |
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What each product offers, as listed by its team.


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Python Stock Screener: Alpha Vantage API vs. Google Finance | #28 (Python for Finance #7)
Aspect Oriented Programming with PostSharp | Pluralsight
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Alpha Vantage is one of the most interesting services. Mainly because it’s extremely simple to use, provides a ton of information (full historical records), and it’s not only cryptos, also has stock prices and other...
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Recommendations tracked on public social media and blogs since March 2021.


Source: code-(right click, view source) | stock data-alphavantage.co. Source: over 3 years ago
Stock prices is really not something you would want to webscrape. It's just not worth it, using an API is a lot faster. Eg alphavantage.co, it's free to use and you get your data in a structured form with zero hassle:. Source: over 5 years ago
Beware, you need to register on alphavantage.co to get your own API key which you put into the url instead of 'demo'. Source: over 5 years ago
Tracking PostSharp since Mar 2021.
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