Talkstack AI is a platform that utilizes artificial intelligence technology to provide customer support and sales agent services. With AI agents, it can perform complex tasks in multiple languages, supports text and voice communication, and offers enterprise-level security. Key advantages of the product include no need for pre-recorded audio or trigger words, fully AI-generated voice responses, and the capability to scale sales and operational teams. It also supports the creation of custom workflows and makes it easy to review the accuracy of responses generated by the AI agent.