Instagram Launches — The Invention of the Photo-First Social Network

On 6 October 2010, a free app called Instagram appeared on Apple's App Store. iPhone-only, square images only, eleven filters and a simple follow-based timeline. It picked up 25,000 sign-ups on launch day, 1 million users in two months, and 10 million in a year.

This app shifted the centre of social media from text to image. And within roughly eighteen months it would be acquired by Facebook for about US$1 billion.

From Burbn to Instagram

Kevin Systrom—Stanford graduate, two years at Google—had originally been building Burbn, a location-based check-in app. Investors saw it as a Foursquare rival and put in US$500,000. In spring 2010 Systrom, together with Mike Krieger (a fellow Stanford alum), tore Burbn apart and decided to keep only "the feature people actually used".

What survived was photo sharing, nothing else. They rebuilt it in eight weeks, named it Instagram (instant + telegram), and pushed it to the App Store. At launch, the company was just the two of them.

Why It Caught

In a crowded field of iPhone photo apps—Hipstamatic, Camera+, PicPlz—Instagram had several sharp differentiators.

The square-image constraint. It threw away 16:9 and 4:3, and forced everything to a square. The timeline layout became predictable, and a feed conveyed information without requiring a tap to open. This is the basis of the later "grid view".

Filter-driven processing. Eleven presets (Earlybird, X-Pro II, and so on) turned an ordinary iPhone 4 photo into something atmospheric. Photo quality no longer depended on the camera. At the time, that was a revolutionary message.

Aggressive removal of social bloat. No text posts, no links, no groups, no messages. One simple feature—follow people for their photos—everything else came later.

iPhone-only. The Android version did not appear until April 2012. Being a community of "creative people with iPhones" gave the early brand its specific gravity.

Facebook's US$1 Billion Acquisition

On 9 April 2012, Facebook announced it was acquiring Instagram for about US$1 billion—US$300 million in cash plus 23 million Facebook shares. At the time, Instagram had:

• 13 employees
• About 30 million users
• Zero revenue (no ads)
• Just under two years of operation

The unit numbers became famous: roughly US$33 per user, around US$77 million per employee. Facebook was about six weeks from its IPO (18 May 2012), and Mark Zuckerberg drove the deal himself with minimal board process—a deliberate snap acquisition.

One caveat that the headline never carried: US$1 billion was the value at announcement. By the time the deal closed later in 2012, Facebook's stock was trading well below its IPO price, and the company's Form 10-K books the acquisition at a purchase price of US$521 million (the US$300 million cash plus roughly 12 million vested shares), with a further US$194 million of unvested shares issued to employee shareholders as share-based compensation—about US$715 million all in. The famous billion-dollar deal was, in cash and stock actually delivered, closer to seven hundred million.

The rationale was clear. In the mobile era of social, Facebook's weakest link was the photo-taking experience. Keep Instagram as an independent brand, and lock down the photo on-ramp. The deal would become the most successful M&A in Facebook's history.

Stories, Reels — Growth by Cloning

Half of Instagram's growth has come from a deliberate strategy of importing competitor features.

August 2016 — Stories. A direct copy of Snapchat's "disappears after 24 hours" format. Within two months, 100 million people were using Stories every day, and Snapchat's growth stopped dead. Kevin Systrom, then CEO, was disarmingly blunt about it on launch day, telling TechCrunch that Snapchat deserved all the credit.

June 2018 — IGTV. Long-form vertical video, aimed at YouTube. It never took off and was retired in 2022.

August 2020 — Reels. A direct copy of TikTok's short vertical video, algorithm-driven recommendation included. It competes head-on with TikTok, and Reels usage spikes every time the US debates banning TikTok.

May 2022. Rebranded logo (the current strong-gradient camera icon).

Scale in 2026

• MAU: 3 billion. This is Meta's own figure, announced by Mark Zuckerberg on 24 September 2025—the first disclosure since Instagram passed 2 billion in 2022.
• DAU: Meta does not break out a daily figure for Instagram. The widely repeated "500 million" is a 2017 Stories number and no longer describes anything current.
• Ad revenue: also not broken out. EMARKETER estimated Instagram's 2025 US ad revenue at US$32.03 billion, or 50.3 per cent of Meta's US ad revenue—the first year Instagram accounts for more than half.
• Average session time: around 33 minutes per day.

While Facebook's core has plateaued, Instagram remains Meta's growth engine.

The Image Became the Subject

Three structural shifts trace back to Instagram.

1. The centre of social media became the image. Before 2010, social meant text (Twitter) or links plus text (Facebook). Instagram moved the form to image-as-the-subject, with text as a caption. TikTok (video-as-the-subject) and Pinterest (image-as-the-subject) sit downstream.

2. The creator economy got its ignition point. The professional categories of "Instagrammer" and "influencer" essentially came from this platform. The plumbing by which brand budgets flow to individuals was set here.

3. The "buy the future of an app" playbook. Facebook's Instagram acquisition, alongside the WhatsApp deal (2014, US$19 billion) and Google's YouTube deal (2006, US$1.65 billion), is taught in business schools as the canonical case of "buy the next social network before it grows into your competitor".

Posting a photo became a social habit of the world. This is where that begins.