Bloomberg terminal
A Bloomberg terminal is a subscription-based financial data and trading platform used mostly by professional investors, analysts, and trading desks. It bundles real-time market data, news, analytics, and messaging into one system that institutions have relied on for decades.
It's also extremely expensive, roughly $30,000 per year per seat, which is why it's realistically out of reach for an individual investor. That price buys real professional-grade value, speed, breadth of coverage, and integrated trading tools a retail investor doesn't need. What a retail investor does need, the core company filings, financial statements, ratios, and market data behind most fundamental research, is also available for free through other sources, just assembled by hand instead of in one system.