Replit Parallel Agents lets you launch up to 10 AI agents simultaneously, each working inside its own sandboxed copy of your codebase on dedicated compute. Instead of waiting for one agent to finish before starting the next task, you can run multiple workstreams at once — one agent refactoring a module, another writing tests, a third building a new feature — all without conflicts. When agents complete their tasks, Replit merges the results back into your project agentically. It's built for developers who find sequential AI assistance too slow and want to compress iteration cycles without manually juggling multiple environments or branches.