Writer, an AI writing assistant for professional users, announced a $21 million Series A funding round.

The financing was led by Insight Partners along with Gradient Ventures, the Todd & Rahul Angel Fund, Scott Belsky, Oliver Jay, Jack Altman, Allison Pickens, Packy McCormick, Lenny Rachitsky, Austin Rief, Ankur Nagpal, Alex MacCaw, Camille Ricketts, Vivek Sodera, Julia Lipton, and James Beshara.

Writer's platform gives companies a single source of truth for content guidelines, makes brand compliance simple, and uses in-context coaching to teach team members how to write using their company's voice.