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$400 million cash plus around US$600 million in Facebook stock). 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 one week from its IPO, and Mark Zuckerberg drove the deal himself with minimal board process—a deliberate snap acquisition.

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. It hit 100 million DAU within two months and stopped Snapchat's growth dead. Adam Mosseri (later head of Instagram) publicly acknowledged learning the idea from Snapchat.

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

Across aggregators—Backlinko, Business of Apps, DataReportal—as of May 2026 Instagram reports roughly:

• MAU: around 2.1 to 2.4 billion (sources vary)
• DAU: around 500 million
• Ad revenue: estimated above US$70 billion (around 40 per cent of Meta's total)
• Average session time: around 33 minutes per day

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

What It Changed

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.