Here are the top 10 fastest-growing apps of the year so far

ClickUp is a project management tool that combines to-do lists with spreadsheets and other kinds of documents, to help you organize any kind of task.

Landbot lets users make their own simple chatbots without any coding. Zapier CEO Wade Foster says that he sees Landbot as an emerging player in helping companies find new ways for their customers to navigate their websites.

Coda is a program that combines documents and spreadsheets for a new way to organize information.

SalesFlare is a automated customer relationship management (CRM) tool aimed at small businesses and startups.

Square is the ubiquitous credit card processing system helmed by Jack Dorsey, who does double duty as the CEO of Twitter. Unique among all the companies on this list, Square is a publicly traded company, with a market cap of about $26 billion at the time of writing.

Klaviyo is an email marketing platform focused on online retailers.

Leadpages lets businesses build custom websites and landing pages for specific marketing campaigns.

Things 3 is a to-do list app for Apple iPhone and MacOS. While Zapier is generally focused on workplace software, Things 3 is more of a consumer tool, making its inclusion somewhat unexpected.

Discord is another odd duck: It's a voice and text chat app that's wildly popular with video gamers, with almost 90 million monthly active users at last count.

Its inclusion on the Zapier list — at the top spot, no less — is an indication that people are taking their personal chat apps into the workplace. It's also an indication that Zapier is perhaps growing beyond its enterprise roots.