The major difference between the GoPro and the Fitbit is that the GoPro is a camera, while the Fitbit is a wearable activity tracker. Both GoPro and Fitbit are relatively young technology companies, popular among outdoor and exercise enthusiasts.
Nick Woodman founded GoPro in 2002 after a surfing trip to Australia. He envisioned capturing high-quality images of his adventure, but the technology in commercially available amateur cameras at the time was inadequate for the task. He developed his camera as a small, portable and durable device that action sports enthusiasts and other amateurs can use to capture high-quality images of their exploits. The first GoPro cameras, released in 2004, used 35mm film, while later versions use digital photography. The company filed for an IPO in 2014.
James Park and Eric Friedman founded Fitbit in 2007. The company's namesake product contains a small motion sensor, similar to the one found in the remote for the Nintendo Wii video game system, that tracks the wearer's movements throughout the day. It helps calorie-counting and otherwise health-conscious users track such metrics as number of steps taken and calories burned, time to fall asleep, and total hours of sleep each day. Fitbit announced its IPO in May of 2015.