Shape Security has now raised $91m in funding since it was founded, after closing a fourth consecutive GV-backed round.

US-based cybersecurity technology developer Shape Security has raised $25m in a series D round backed by GV, the corporate venturing unit formerly known as Google Ventures.

The round, co-led by Baseline Ventures, Northern Light and Epic Ventures, also included existing backers Kleiner Perkins Caufield & Byers (KPCB), Venrock, Norwest Venture Partners and Tomorrow Ventures.

Shape Security’s Shape Botwall Service works to stop automated web and mobile app attacks, protecting accounts for businesses spanning the financial services, airline, retail and government…