# Slack

> Team messaging and collaboration platform for workplaces.

## Why it is interesting

Fastest-growing enterprise app of its era — a16z board seat before IPO and Salesforce exit.

## Profile

- **Stage:** acquired
- **Status:** acquired
- **Industries:** generalist-tech
- **Coverage:** full
- **Last updated:** 2026-07-24

## Key facts

- Series E (Apr 2015): $160M at $2.8B; Kleiner, Spark, Index among participants (TechCrunch)
- IPO (2019) then exit (2021): acquired by Salesforce

## Investors in our directory

- https://venturecapitaltracker.com/fund/andreessen-horowitz
- https://venturecapitaltracker.com/fund/kleiner-perkins
- https://venturecapitaltracker.com/fund/spark-capital
- https://venturecapitaltracker.com/fund/index-ventures

## Related articles

- https://venturecapitaltracker.com/2026-a16z-hot-portfolio-companies

---
Source: https://venturecapitaltracker.com/startup/slack