The social media app - which is owned by Facebook - is looking to challenge the video sharing platform with its own Reels feature.
In a statement to TechCrunch, a Facebook spokesperson confirmed a US and international launch, commenting: "We're excited to bring Reels to more countries, including the US, in early August.
"The community in our test countries has shown so much creativity in short-form video, and we've heard from creators and people around the world that they're eager to get started as well."
Reels - which is designed for short-form, creative content - launched in India this month after rival TikTok was banned in that market, and it has also been tested in Germany, Brazil and France.
In a new area of the Instagram app, Reels lets users create and post 15-second videos set to music or other audio, in a similar way to TikTok.
There are also editing tools, including a countdown timer and ways of adjusting the video speed.
However, one big difference is that Reels doesn't have a two-tabbed, scrollable news feed in the same way TikTok does.