A decade ago, no-one had heard of Twinkl. Fast forward ten years, and if you still haven't then you must have been hiding somewhere.
Twinkl is one of the city's biggest employers along with millions of users right around the world.
But what do they do, and how have they got so big so quickly? James met up with chief product officer Helen Fulson and chief operating officer David Angrave to find out.
Steel City Business is the Sheffield Business podcast, highlighting the great stuff happening within the business community here in Sheffield.
Each episode features a company or organisation based in or around the city - from the big ones right down to the sole traders. If it’s happening in Sheffield, we’ll be covering it.
It’s brought to you by the team at Rebel Base Media, the Sheffield-based podcasting experts. 
Find out more at steelcitybusiness.com - and if you want to appear on Steel City Business or know someone we should feature email hellothere@rebelbasemedia.io