Analyze a company's investment profile by looking at pertinent news, stock price patterns, and overall sentiment.
Has a REST API. Free tier offers 1 API key, 60 requests per minute, 1000 requests per day. The premium tier isn't too bad ($25us/month) if you need to heavily use their service.
A django-framework self-hosted invest statistics tool. Works well in analysis index-based investments.
Free real-time, historical and intraday stock data APIs
Access the best stock market data from over 70 exchanges plus news, crypto and forex data, all for free. Perfect for everyone from startups to enterprise corporations. Free API key.
Free tier: 100 requests/day
Basic tier: $9us/month, 2500 requests/day
Over the years I've amassed a large collection of links, resources, tools and so on that I find useful in my trading/investing activities. I'm compiling those here, along with any that were shared with me via Twitter/Reddit/email/etc and seemed useful after a cursory look. While I've done my best to link to tools that are not only legitimate but also likely to stay active, alive and useful for the foreseeable future, obviously I have no control over these companies/websites and over time some of the links may break or situations may emerge that turn them into poor recommendations. Also, this list is not exhaustive by any means and may be updated in the future as new tools/resources emerge.
Road To FIRE is a portfolio manager app for your stocks, ETFs, mutual funds, bonds, cryptocurrencies, commodities, P2P loans and real estate. It runs in your browser, so you don't need to install anything. Privacy is important, so all data is stored in your local browser (or your cloud storage account, if you provide one in order to sync data across your devices). The only data sent to the app server are the symbols for your assets, in order to get their current quotes.