Best alternatives to ADE (Agentic Development Environment) in 2026

Developers increasingly use more than one AI coding assistant — maybe Claude Code for one task, Cursor for another — but juggling them means separate windows, separate terminals, and no easy way to see what each one is actually doing at a glance. ADE works like a control room with several screens, one per assistant, each watching its own isolated workspace, so you can run multiple AI coding agents on different parts of a project in parallel and check in on any of them from your laptop, an iPhone, or a terminal, with everything staying in sync. Technically, ADE orchestrates multiple AI coding agents (Claude Code, Codex, Cursor, Factory Droid, OpenCode) simultaneously using isolated Git worktrees per "lane," so concurrent agents don't step on each other's changes. It syncs state in real time across macOS, iOS (via TestFlight), and terminal, includes a built-in browser and file editor, consolidated GitHub PR management with diffs and CI status, and a "CTO" feature meant to hold project-level memory and oversight across sessions. It's free and open source, local-first, with a backend machine handling the sync.