Blue Mantis | 19,484 followers on LinkedIn. Blue Mantis is a security-first, IT solutions and services provider with a 30+ year history of successfully helping clients achieve business modernization by applying next-generation technologies including managed services, cybersecurity and cloud. Headquartered in Portsmouth, New Hampshire, the company provides digital technology services and strategic guidance to ensure clients quickly adapt and grow through automation and innovation. Blue Mantis partners with more than 1,500 leading mid-market and enterprise organizations in a multitude of vertical industries.