Slack uses Amazon Elastic Block Store (Amazon EBS) for nightly backups of MySQL instances running on Amazon EC2 i2s instances the Amazon EBS volumes are attached to the instances and used as temporary storage before being sent to Amazon S3. Slack has a relatively simple IT architecture that is based on a broad range of AWS services, including i2.xlarge Amazon Elastic Compute Cloud (Amazon EC2) instances for basic compute tasks Amazon Simple Storage Service (Amazon S3) for users’ file uploads and static assets and Elastic Load Balancing to balance workloads across Amazon EC2 instances. “During the development of Slack, the feeling was that AWS was good to us and would continually improve with more and better features. “Given their expertise and pains running a more traditional environment when Flickr was developed, Slack’s founders realized it was a no brainer to use AWS,” says Crowley. Tiny Speck-the original company name for what became Slack Technologies-used AWS in 2009 when it was the only viable offering for public cloud services. We could have operated with that kind of IT infrastructure, but the cost and complexity would have made it much harder to launch the business.”Ĭrowley says Slack turned to Amazon Web Services out of experience and because it was the best choice for the company going forward. “Plus we would have needed an extra layer of expertise just to run the infrastructure. “The realities of physical space, hardware acquisition, replacement parts, running a server facility with all its costs-all the physical manifestations that can lead to breakages-made a traditional IT environment impractical for an Internet startup,” says Richard Crowley, Slack’s director of operations. Going to the cloud was the logical choice. If Slack was to succeed in a fiercely competitive business-software marketplace, its founders knew they would need a lean staff, low costs, and above all an IT environment capable of supporting speed, agility, and innovation. One of those was the importance of picking the right IT infrastructure to run the business. Slack’s founders had already learned hard lessons from previous failed ventures. By June 2015-less than 18 months after its launch-the company already had more than 1.1 million daily users, 300,000 paid seats, and more than 30 million messages flowing through Slack each week via integrations with other services. In the age of the unicorn startups, Slack has drawn attention for its meteoric rise and potential for disrupting traditional business communications tools, particularly email.
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