This report highlights Slack as a potential disruptor in the enterprise software market, with the potential to reshape how white-collar workers collaborate. Slack has experienced unprecedented growth, reaching $10M ARR in a few months, $100M in less than three years, and $400M in less than five years. The report estimates the total enterprise productivity market at $230Bn today and expects it to grow to $500Bn by 2024, with Slack targeting the collaboration space which currently accounts for 14% of the total addressable market. Slack's unique business model combines highly recurring revenue and viral growth driven by bottom-up and top-down customer acquisition channels. The company has achieved significant traction with over 10M DAUs and 85K paying teams, which are unlikely to churn due to high engagement levels and increasing amounts of data created and stored. Slack is also becoming a platform, further entrenching itself within the corporate environment with a growing ecosystem of over 1,500 integrations powered by Slack's API.