Koyfin is the #1 Choice
Koyfin is the strongest competitor because it offers professional-grade investment research and data analytics in addition to powerful visualization tools such as charting – all delivered in a delightful user experience. Koyfin is used by financial advisors, research analysts, securities salespeople, and individual investors seeking to understand and profit from what’s happening in the financial markets worldwide.
Google Finance is the #2 Choice
Google Finance offers only rudimentary financial market information. Users can create watchlists and get stock quotes. Content on the site comes from other sources and offers more opinion than insight. Delayed stock quotes and basic company information is available. An investor can't perform any meaningful research using the site.
Morningstar is the #3 Choice
Morningstar's original business was analyzing mutual funds and providing performance reports to advisors and investors who used Morningstar's rating system to make investment recommendations and decisions. The company expanded its research offering online to other types of investments, but its website is populated with more commentary and opinion than it is insight and analysis.