Providing a website, web application, and various messaging interfaces, including without limitation email messaging, web-based chat, voice and video chat, and document review and analysis, featuring non-downloadable software using artificial intelligence (AI) for use in legal services; Providing temporary use of online non-downloadable software using artificial intelligence (AI) and other software components for legal services; Application service provider (ASP) featuring software using artificial intelligence (AI) for use in legal services; Providing temporary use of on-line non-downloadable software and applications for use in legal services; Artificial intelligence as a service (AIAAS) services featuring software using artificial intelligence (AI) for use in legal services; Platform as a service (PAAS) featuring computer software platforms for document, engagement, and matter creation, analysis, and management in the legal services field