When comparing IEX Developer Platform vs Twelve Data, the Slant community recommends IEX Developer Platform for most people. In the question“What is the best stock market API?” IEX Developer Platform is ranked 2nd while Twelve Data is ranked 5th. The most important reason people chose IEX Developer Platform is:
It has multiple SDKs ready to use on plenty of platforms.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Unofficial libraries and integrations
It has multiple SDKs ready to use on plenty of platforms.
Pro There are no request limits
They do throttle requests per IP, but you should get over 100 per second.
Pro Good documentation
The API is well documented with examples.
Pro No login required
No paperwork or login required to get started.
Pro Free as in 'free pizza'
It costs nothing.
Pro International markets
Wide range of assets supported including non-US markets (India, Canada, etc).
Pro Data quality
Reliable data for real-time and historical analysis.
Pro Human support
Very fast and polite support, always responding within a few hours.
Pro Streaming data
Apart from classical API, there is an opportunity to streaming low latency data using Websocket.
Pro Technical indicators
The largest collection of indicators anywhere observed, including complex ones as Ichimoku.
Cons
Con No official libraries or integrations
Only third-party integrations so you likely need to write your own for your own needs.
Con Does not have technical instruments
API does not provide you stats like MACD, STOCH etc.
Con Some missing SDKs
No SDKs for some languages, in my case C#.
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