Atrium | 6,712 followers on LinkedIn. Exceptional professional services delivered differently. | Atrium is reimagining the way professional services for startups are delivered. Through a technology platform and network of expert providers, Atrium’s mission is to accelerate the growth of startups by advising them in the areas where they most need help, such as legal, fundraising, HR & culture, and hiring. This empowers founders and startup executives to no longer be bogged down by the operational details and instead focus on their superpower.