D4, LLC is a national leader in providing litigation support and ediscovery services to law firms and corporate law departments. D4 covers the spectrum of the Electronic Discovery Reference Model (EDRM), from identification and preservation of data through forensic and targeted onsite data collection; from data analytics and defensible search methodology through hosted review and production services. D4 assists attorneys in litigation response planning, strategies for negotiation of scope and meet-and-confer, computer forensics, expert testimony, and approaches to cost reduction in litigation support projects and in corporate law department operations. For its rock-solid and highly-scalable performance in hosted review and its outstanding service to clients, D4 was named by kCura as “Relativity Best in Service”. D4 is also a certified reseller of Relativity by kCura as well as Legal Hold Pro by Zapproved.