Apollo refers to several widely known things depending on context: a Greek god of music and prophecy, NASA’s historic moon-landing program, a major investment firm, a sales software platform, or a developer tool for building APIs. If you searched “what is Apollo,” you likely encountered one of these and want to know what it is. Here’s a clear breakdown of each.
Apollo in Greek Mythology
Apollo is one of the most important gods in the Greek pantheon. He ruled over an unusually wide range of domains: prophecy, music, archery, healing, and poetry. He also served as a protector of crops and herds, warding off disease and wild animals. The Greeks gave him the epithet Alexikakos, meaning “Averter of Evil.”
From the time of Homer onward, Apollo represented divine distance, the god who made mortals aware of their own guilt and purified them of it. He presided over religious law and the constitutions of cities, and he communicated the will of his father, Zeus, to humans through oracles. The most famous of these was the Oracle at Delphi.
In art, Apollo appears as a beardless youth, either naked or robed, almost always carrying one of his two signature attributes: a bow and a lyre. The bow symbolized death, terror, and awe. The lyre represented the joy of music, poetry, and dance. His sacred tree is the laurel, tied to the myth of Daphne, who was transformed into a laurel tree while fleeing his pursuit.
NASA’s Apollo Program
The Apollo program was NASA’s effort to land humans on the Moon and return them safely to Earth. It ran from 1962 to 1972 and achieved six successful lunar landings, making it the only program in history to put people on another world.
The program’s goals extended beyond the landings themselves. NASA aimed to establish the technology needed for broader national interests in space, achieve American preeminence in space during the Cold War, conduct scientific exploration of the lunar surface, and develop the human capability to work in the lunar environment. Apollo 11 in 1969 carried the first crew to walk on the Moon, and Apollo 17 in 1972 was the last.
Apollo Global Management
Apollo Global Management is one of the largest alternative investment firms in the world. It operates two primary business segments: asset management and retirement services. As of December 31, 2025, Apollo managed $938 billion in assets.
The firm’s investment philosophy centers on three principles. First, purchase price matters: Apollo focuses on allocating capital to the best risk-to-reward opportunities in any market environment. Second, the firm aims to generate excess return per unit of risk across the full spectrum. Third, Apollo emphasizes alignment with its investors by committing its own capital alongside theirs, making it one of the largest limited partners in its own funds. In practical terms, this means the people managing the money have significant skin in the game.
Apollo.io Sales Platform
Apollo.io is a sales intelligence and outreach platform used by sales teams to find potential customers and contact them at scale. Its database includes more than 230 million contacts and 30 million companies, making it one of the largest B2B (business-to-business) prospecting tools available.
The platform’s core features go beyond just finding contact information. It offers AI-powered multichannel campaigns, meaning you can set up automated outreach across email and other channels with minimal manual work. It includes built-in email deliverability safeguards to help messages land in inboxes rather than spam folders, automated follow-up sequences so leads don’t go cold, and workflow automations that help teams identify what outreach strategies are working and scale them. It also has a built-in calendar and scheduling tool for routing qualified leads directly to meetings.
Apollo GraphQL
Apollo GraphQL is a platform for building, deploying, and scaling APIs (the connections that let software applications talk to each other). It uses a technology called GraphQL, which lets developers request exactly the data they need from a server rather than getting a fixed bundle of information. Think of it as ordering specific items off a menu rather than being handed a preset meal.
The platform has two main components. Apollo Client is a library for web applications, particularly those built with React, that helps manage data on the front end (the part users see and interact with). Apollo Server is an open-source tool for building the back end, the part that receives data requests and sends responses. It can pull data from databases, third-party services, and other API types, then deliver it through a single GraphQL endpoint. For development teams, this simplifies how different parts of an application communicate with each other.