Who actually built AOL Instant Messenger?
AOL Instant Messenger came off AOL's engineering floor rather than out of a product plan. Barry Appelman, an AOL engineer who had worked on early TCP/IP standards at IBM, built the Buddy List, the panel that showed which of your friends were signed on at that moment.
"Buddy List was done without telling anybody, because we didn't have any product management then," Appelman told Mashable in 2014. "So I just decided to do it." His first version broke often enough that colleagues called it the Buggy List.
By 1997 he had it working and filed a US patent for what the paperwork called "User definable on-line co-user lists." Strip the legal phrasing and that is the buddy list, and every contact panel in every messaging app since has worked the same way: a list of people, each one marked present or absent.
AOL released AOL Instant Messenger in May 1997. The decision that mattered was giving the client away to anyone with an internet connection instead of only to paying AOL subscribers. A teenager on a rival dial-up service could download it, pick a screen name and talk to AOL members for free. AIM grew fastest outside AOL's own walls, which is precisely what AOL's subscription business was not built to reward.
How big did AIM get at its peak?
AIM peaked as a desktop product. TechSpot puts the high point at 36 million active users in 2001, and 63 million by 2007. Those are large numbers for software that required both people to be sitting at a computer, signed in, at the same moment.
The culture around it grew faster than the feature list. Screen names worked as pseudonyms years before real-name social networks arrived. Away messages were status updates before the phrase existed: song lyrics, inside jokes, a note that dinner was happening. The buddy icon was a profile picture. Sorting buddies into groups was the first social graph most American teenagers ever edited by hand.
AIM also normalized the small signals that chat apps still use. Presence, typing indicators, one-to-one windows stacked across a desktop, file transfers between friends. MSN Messenger, Yahoo Messenger and ICQ all competed hard for the same users, and none of them was close to a monopoly. In American schools through the early 2000s, though, the default question was which screen name you used.
Is AIM still in business in 2026?
No. AOL Instant Messenger has not run since December 15, 2017. Oath, the Verizon unit that then owned both AOL and Yahoo, announced the shutdown on October 6, 2017 and gave users about ten weeks of notice. When the servers went dark, stored buddy lists and account data went with them.
"AIM tapped into new digital technologies and ignited a cultural shift, but the way in which we communicate with each other has profoundly changed," wrote Michael Albers, Oath's vice president of communications product, in the announcement Variety reported that week.
The brand behind it kept moving. Verizon later sold the AOL and Yahoo businesses to Apollo Global Management, and AOL still exists as a going concern. On January 2, 2026, the Italian software company Bending Spoons completed its purchase of AOL Holdco I LLC for about $1.45 billion, a transaction recorded in the Form F-1 registration statement it filed with the US Securities and Exchange Commission. That filing describes AOL as an email service, news portal and search engine with roughly 8 million daily and 30 million monthly active users. None of them is AIM. The trademark now sits inside a company that sells email subscriptions.
What actually killed AIM?
Three pressures arrived at once. The iPhone shipped in 2007, and the generation coming up behind AIM was going to communicate online mainly from a phone. Once American teenagers had texting on a handset, coming home and signing on stopped being the way you reached anybody.
Social networks then absorbed the function. Facebook and MySpace put messaging inside the place people already spent their evenings, so a separate client and a separate screen name became an extra step rather than the point. AIM shipped mobile apps, but it was answering a question the market had already moved past.
AOL's own attention was the third pressure. The company spent the 2000s inside the AOL and Time Warner merger and the long unwinding that followed, and its revenue came from dial-up subscriptions rather than from a free chat client whose biggest gains came from people who were not customers. AIM was strategically awkward at AOL for its entire life. The product with 63 million users in 2007 was not the product AOL was organized to defend.
Can you still log in to an AIM screen name today?
Not the original one. AOL deleted the service and its account data in December 2017, so an old screen name and password open nothing. What exists instead are independent servers that speak OSCAR, the protocol the classic AIM clients used.
AIM Phoenix, run by the hobbyist group Wildman Productions, operates a private network that period AIM clients can connect to once you register a fresh account. A developer publishing as mk6i has since released Open OSCAR Server, an MIT-licensed reimplementation written in Go that anyone can host and that decades-old Windows clients connect to without modification.
These are reconstructions, not a restoration. The project's own repository describes it as "Independently developed, not affiliated with or endorsed by AOL or Yahoo! Inc." and entirely non-commercial. Nobody's buddy list is waiting on these servers unless two people agree to install a 2002 client on purpose. What they preserve is the behavior: the sign-on sound, the window stack, the away message sitting there all afternoon. ICQ fans have the same option, because the same protocol family served both services.
Frequently Asked Questions
When did AIM shut down?
AOL Instant Messenger shut down on December 15, 2017, after 20 years of service. Oath, the Verizon division that owned AOL at the time, announced the closure on October 6, 2017, and stored buddy lists and account data were deleted when the servers went off.
Can you still use AIM in 2026?
There is no official AOL Instant Messenger service in 2026 and there has not been one since December 2017. Enthusiast networks such as AIM Phoenix, and the open-source Open OSCAR Server that people host themselves, let classic AIM clients sign in again, but they need a new account and none of them is run by AOL.
Why did AOL Instant Messenger fail?
AOL Instant Messenger lost its users to phones and social networks. The iPhone arrived in 2007, texting and in-platform messaging took over the habit of signing on at a desktop, and AOL, whose money came from subscriptions, never turned its free chat client into a business before closing it in 2017.