At Slack, we use Terraform for managing our Infrastructure, which runs on AWS, DigitalOcean, NS1, and GCP. Even though most of our infrastructure is running on AWS, we have chosen to use Terraform as opposed to using an AWS-native service such as CloudFormation so that we can use a single tool across all of our infrastructure service providers. This keeps the infrastructure-as-code syntax and deployment mechanism universal. In this post, we’ll have a look at how we deploy our infrastructure using Terraform at Slack.