LightTag is a tool for managing in-house team annotation projects, designed to accelerate and improve the outcomes of Natural Language Processing initiatives. LightTag removes the misery of manual project management and QA of large annotation projects and instead promises ease, simplicity, speed and superior quality. As a product designed specifically for in-house annotation of complex or proprietary data by large (or small) teams, LightTag has incorporated all of the best practices into its UI, to minimize mistakes and ensure the best quality annotation output.