Pieter Levels had shipped more than 70 projects in roughly a decade — most failed, a few like Nomad List and Remote OK paid the bills — while building a large public following by publishing everything. His Avatar AI briefly went viral and made about $150,000 in its first week, until the funded app Lensa copied the idea and made $30 million with a polished mobile product.

Charge from day one: a monthly fee buys photorealistic AI photos made from your own selfies, and every published revenue milestone becomes the marketing.

Photo AI launched on 10 February 2023 with no free tier: users uploaded a handful of selfies, a private model was fine-tuned on them, and the service generated photorealistic headshots and lifestyle photos in any setting. Levels ran it solo on a deliberately boring stack — vanilla PHP, SQLite, one server, Stripe, and the Replicate API for GPU compute — with monthly plans from about $19 to $199 and generous annual deals. He treated the audience as the distribution: roughly half of all traffic came from his X followers, and every milestone — including a tweet revealing 1,872 paying customers making $61,808 a month inside one 14,000-line PHP file — was posted publicly and drew millions of views.

Photo AI hit about $5,400 in its first week, $28,700 in month two, $61,800 by month six and more than $100,000 a month by month 18. By November 2025 Levels reported $132,000–$138,000 in monthly revenue — roughly $1.6 million a year — with costs of about $13,000 a month, mostly GPU compute, and no employees; in 2026 he published exact figures of about $105,000 in monthly revenue and $80,000 in profit from a single 40,000-line PHP file.

By 2022 Pieter Levels was one of the best-known builders-in-public on the internet: he had shipped dozens of projects since his 2014 challenge of twelve startups in twelve months, published their revenue, and watched most of them fail. His late-2022 Avatar AI, which turned selfies into cartoon avatars, was a genuine viral hit — roughly $150,000 in its first week — until Lensa, a funded rival with a polished mobile app, copied the trick and reportedly made $30 million.

Levels' answer was not to fight harder on avatars but to change the product and the business model. In February 2023 he launched Photo AI: users upload a few selfies, a model is fine-tuned on their face, and the service produces photorealistic headshots and lifestyle photos in any setting. There was never a free tier — payment came first — and the stack stayed intentionally unglamorous: vanilla PHP and SQLite on a single server, Stripe for payments, and the Replicate API for GPU time. Prices ran from about $19 to $199 a month, with annual plans framed as months free.

The business grew on a feedback loop between product and audience. Levels' roughly half a million X followers supplied about half the traffic, and he posted revenue milestones as content: a July 2023 tweet revealing 1,872 paying customers and $61,808 a month of revenue from one raw-PHP file drew about 4.8 million views. Monthly revenue passed $100,000 by month 18 and reached $132,000–$138,000 by November 2025, with costs of about $13,000 a month and margins above 87 per cent — all for a product run by one person.

Paid-only pricing from day one filtered for real demand, funded the product immediately, and kept out the free users who generate abuse and spam.

The product rode a genuinely new capability — photorealistic images of a specific person from a phone's worth of photos — instead of competing on a copied novelty.

A decade of building in public gave Levels a distribution channel that no ad budget could buy: hundreds of thousands of followers who watched every milestone.

A boring stack and a one-server architecture kept cost and complexity near zero, so nearly all revenue — more than 87 cents of every dollar — became profit.

Distribution plus price discipline beats polish: a paid-only product validates demand in week one, and posting the revenue scoreboard keeps turning success into its own sales channel.

Photo AI became the biggest hit of Levels' portfolio: by November 2025 it was doing $132,000–$138,000 a month on about $13,000 of costs with zero employees, while funded copycats struggled to match its pace. Levels kept publishing exact numbers, and in 2026 revealed the product ran on one 40,870-line PHP file making about $105,000 a month in revenue and $80,000 in profit. His broader portfolio was reported at roughly $3.1 million in annual recurring revenue — all solo.

FOLLOW THE EVIDENCE

The sources

  1. Photo AI by Pieter Levels: Complete Deep Dive Case Study — $0 to $132K MRR in 18 Months indiehackers.com
  2. How Pieter Levels Built Photo AI to $132K MRR as a Solo Founder andrew.ooo
  3. How Photo AI Became Pieter Levels' Biggest Hit — After 70 Failed Attempts tycoon.us