Bloomberg Terminal for finance (1981-present)
Michael Bloomberg built a dedicated hardware-and-data terminal for financial professionals in 1981, bundling proprietary market data, analytics, and messaging.
The terminal became the standard tool in finance. It survived competition from Reuters and Thomson because its data was exclusive and its workflow integration was total.
Bloomberg's roughly $30 billion in annual revenue half a century later shows how a domain-specific data-plus-tools bundle can dominate a professional market.
Astra for Law bundles a model, a legal index, and workflow plugins — a Bloomberg-style bundle for lawyers. Whether the legal index is exclusive enough to sustain a moat is the open question.
