Sequoia (Sequoia Consulting Group / Sequoia Benefits & Insurance Services) is a U.S.-based benefits brokerage and HR advisory firm that also provides a software platform, Sequoia OS (also referred to as Sequoia People Platform), for consolidating compensation and benefits data and running compensation and benefits workflows. Sequoia operates Sequoia One, a professional employer organization (PEO) that provides outsourced HR, payroll, benefits, and compliance services targeted at venture-backed startups.
In practice, Sequoia is frequently purchased as a combined services and software offering (brokerage/advisory plus PEO) with the software functioning as an enabling layer, rather than as a stand-alone, self-service HRIS product.