The Idea: In 2021, three University of Cambridge grads had a simple observation: students spend nine hours a day on their phones getting hooked by TikTok's infinite scroll, and then close the app to "go study" using tools that felt like homework from 2003. The engagement gap wasn't a technology problem - it was a design problem. Petros Christodoulou (ex-Amazon ML researcher), Robin Jack, and Paul Evangelou believed the same psychological loops that make social media addictive - streaks, leaderboards, limited lives, bite-sized dopamine hits - could be applied to learning. The insight wasn't "study apps should be fun". It was "people aren't addicted to their phones, they're addicted to progress, novelty, social connection, and reward." So why not redirect that energy toward something that actually builds their future? They started building an AI-native learning platform that turns any notes, PDF, YouTube video, or lecture slide into a gamified quiz. This was the beginning of Gizmo.

The Execution:

• 2021: Petros, Robin, and Paul found Gizmo in London, fresh out of Cambridge, with a singular thesis: make studying as addictive as TikTok.
• 2022: Build a web and mobile platform that uses proprietary LLMs to generate quizzes from any content the user uploads - PDFs, PowerPoints, YouTube videos, Quizlet imports. Launch daily streaks, 15 lives per day, and friend leaderboards straight out of the Duolingo playbook.
• Sep 2023: Hit 300,000 users growing 50% month-over-month mainly through word of mouth, and raise a $3.5M seed round led by NFX with Ada Ventures and Capital T participating. Some users are on 365+ day streaks.
• 2024-2025: Double down on TikTok as the primary acquisition channel, partnering with study creators and posting hacks. Build a data network effect - every quiz a student creates makes the platform more valuable for the next student studying the same material. Expand into 120+ countries.
• Apr 2026: Announce a $22M Series A led by Shine Capital with NFX, Ada Ventures, Seek Investments, and GSV participating. User base has crossed 13 million learners across 120+ countries - a 43x increase in under three years.
• Today: Scaling the team from 7 to 30 employees, expanding aggressively into the US college market, and leaning further into the "better screen time" positioning. At $8.80/mo and $52.80/yr, even modest conversion on 13M users puts Gizmo on a real path to profitability.

The lesson? Don't fight the attention economy - repoint it. Every edtech startup for the last decade has tried to compete with social media by being the opposite of social media: quiet, serious, "distraction-free". Gizmo won by using the exact same behavioral mechanics - streaks, lives, leaderboards, progression - and aiming them at a better outcome. When your users already have a habit loop, the fastest path to growth is hijacking it, not replacing it.