Tabnine and Devin are two prominent AI-powered development tools that offer different approaches to assisting developers. Tabnine excels in providing real-time, context-aware AI code completions and suggestions, while Devin takes a more autonomous approach as an AI development teammate capable of handling complete software development tasks. Both tools have strong features such as context awareness, AI chat capabilities, and privacy and security measures. However, they cater to different needs - Tabnine is ideal for developers who want to enhance their coding productivity with full control over their process, while Devin is better suited for teams looking to delegate entire development workflows to an AI coding assistant. The choice between the two ultimately depends on the specific development requirements and needs of the team.