Postmates CEO tells Fortune that his company has "a beautiful path to an IPO in 2019. ": On-demand food and grocery delivery service Postmates just earned itself a place among the tech unicorns with a fresh $1.2 billion valuation, as reported by Fortune. On Tuesday morning, the Silicon Valley-based startup, which competes against tech giants like Amazon.com Inc. (AMZN), Uber Technologies Inc., and GrubHub Inc. (GRUB), announced that it has raised another $300 million in venture funding. The latest round, intended to help accelerate Postmates' growth in the U.S., was led by U.S. Tiger Global.