Workplace communication app creator Slack Technologies raised the cash at a $1.1bn valuation, just over a year after launching its product.

Slack Technologies, the US-based developer of a workplace communication app, has raised $120m in a series D round co-led by Google Ventures, the Wall Street Journal reported on Friday.

The company secured the funding at a $1.12bn valuation. Google Ventures, the corporate venturing arm of internet company Google, co-led the round with venture capital firm Kleiner Perkins Caufield & Byers.

Andreessen Horowitz, Accel Partners and The Social+Capital Partnership, the three investors in Slack’s $42.8m series C round in April this…