Slack doubles user base to 1.1m daily active users

25 Jun 201513 Shares

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Slack, the productivity and communications tool for teams who see email for the steaming morass it has become, has doubled its user base to 1.1m daily active users.

Just four months ago the company passed 500,000 daily active users.

Slack is understood to have grown its paid customers to 300,000, up from 135,000, bringing in annual recurring revenue of US$25m.

The company has also made a strategic hire in the person of April Underwood, former director of product at Twitter, who will now become Slack’s first head of platform.

Slack is in the process of creating 100 new jobs in Dublin and has established an office at the Digital Hub in Dublin 8.

In March, it emerged that Slack, founded by Stewart Butterfield, is in the process of raising US$160m in a funding round that could value the company at up to US$2.76bn.

Canada-born Butterfield co-founded image-sharing site Flickr in 2002 with Caterina Fake and Jason Classon, originally as a video games business.

After a subsequent start-up called Glitch shut down in 2012, Butterfield started Slack in 2013. Slack is a project management tool that was created by the Glitch team.

Slack has quickly become the tool of choice for a growing number of creators, designers, entrepreneurs and software developers and is growing to become a mainstream productivity tool for businesses.

Teamwork image via Shutterstock

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Editor John Kennedy is an award-winning technology journalist.

editorial@siliconrepublic.com