Codeium

Devin, from Cognition, operates as a self-directed agent: given a task, it plans steps, writes and executes code, runs tests, interprets the output, and iterates — without a developer holding its hand through each transition. The vendor positions it for high-volume routine tickets, legacy migrations, and exploratory codebase work where the bottleneck is throughput, not creativity. Teams delegate backlog tickets and get draft PRs back; the agent handles the scaffolding. The ceiling appears on tasks requiring deep organizational context — tribal knowledge about why a module exists, or business logic that lives in nobody's head and in no doc. At that point, a developer re-enters the loop, which partly offsets the delegation gain.