When comparing ALPHA VANTAGE vs Twelve Data, the Slant community recommends ALPHA VANTAGE for most people. In the question“What is the best stock market API?” ALPHA VANTAGE is ranked 3rd while Twelve Data is ranked 5th. The most important reason people chose ALPHA VANTAGE is:
Alpha Vantage API supports a lot of technical indicator out of the box
Ranked in these QuestionsQuestion Ranking
Pros
Pro Has a lot of technical indicators
Alpha Vantage API supports a lot of technical indicator out of the box
Pro Good documentation with examples
Pro Has free tier
You can get started without paying a dime.
Pro Has real-time data
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 API Call limits
Free tier has API request limitation of up to 5 API requests per minute and 500 requests per day. If you would like to target a larger API call volume, you will need premium membership.
Con Some missing SDKs
No SDKs for some languages, in my case C#.