The public history of Gmail dates back to 2004. Gmail, a free, advertising-supported webmail service with support for Email clients, is a product from Google used by more than 3 billion active users globally . Over its history, the Gmail interface has become integrated with many other products and services from the company, with basic integration as part of Google Account and specific integration points with services such as Google+, Google Calendar, Google Drive, Google Hangouts, Google Meet, YouTube, and Google Buzz. It has also been made available as part of Google Workspace (formerly G Suite). The Official Gmail Blog tracks the public history of Gmail from July 2007. In 2026, Google integrated the AI model Gemini 3 into Gmail to turn it into personal assistant that composes messages via the (Help me write) feature.
Internal development Gmail was a project started by Google developer Paul Buchheit, who had already explored the idea of web-based email in the 1990s, before the launch of Hotmail, while working on a personal email software project as a college student. Buchheit began his work on Gmail in August 2001. At Google, Buchheit had first worked on Google Groups and when asked "to build some type of email or personalization product", he created the first version of Gmail in one day, reusing the code from Google Groups. The project was known by the code name Caribou, a reference to a Dilbert comic strip about Project Caribou. At the time when Gmail was being developed, existing email services such as Yahoo! Mail and Hotmail had extremely slow interfaces written in plain HTML, with almost every action by the user requiring the server to reload the entire webpage. Buchheit attempted to work around the limitations of HTML by using highly interactive JavaScript code, an approach that ultimately came to be called AJAX (Asynchronous JavaScript and XML). Buchheit recalls that the high volume of internal email at Google created "a very big need for search". Advanced search capabilities eventually led to considerations for providing a generous amount of storage space, which in turn opened up the possibility of allowing users to keep their emails forever, rather than having to delete them to stay under a storage limit. After considering alternatives such as 100 MB, the company finally settled upon 1 GB of space, compared to the 2 to 4 MB that was the standard at the time. Buchheit had been working on Gmail for about a month when he was joined by another engineer, Sanjeev Singh, with whom he would eventually found the social-networking startup FriendFeed after leaving Google in 2006. Gmail's first product manager, Brian Rakowski, learned about the project on his first day at Google in 2002, fresh out of college. In August 2003, another new Google recruit, Kevin Fox was assigned the task of designing Gmail's interface. When the service was finally launched in April 2004, about a dozen people were working on the project. Initially the software was available only internally as an email system for Google employees. According to Google, the software had been used internally for "a number of years" before it was released to the public in 2004.
Public release For much of its development, Gmail had been a skunkworks project, kept secret even from most people within Google. “It wasn’t even guaranteed to launch–we said that it has to reach a bar before it’s something we want to get out there,” says the Gmail interface designer Kevin Fox. By early 2004, however, almost everybody at Google was using Gmail to access the company's internal email system. Gmail was announced to the public by Google on 1 April 2004, after extensive rumors of its existence during testing. Owing to the April Fool's Day release, the company's press release aroused skepticism in the technology world, especially since Google had been known for making April Fool's jokes, such as PigeonRank. However, they explained that their real joke had been a press release saying that they would take offshoring to the extreme by putting employees in a "Google Copernicus Center" on the Moon. Jonathan Rosenberg, Google's vice-president of products, was quoted by BBC News as saying, "We are very serious about Gmail." Even when the service was announced to the public, Google did not have the required infrastructure in place to provide millions of users a reliable service with a gigabyte of space apiece. Gmail ran on three hundred old Pentium III computers nobody else at Google wanted. This was sufficient for the limited beta rollout the company planned, which involved inviting about 1,000 opinion leaders and then allowing them to invite their friends and family members to become beta testers, with trials beginning on 21 March 2004.
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