Saggar vs Kiro
A whole agent, from spec to pull request, and a window for the agents you already run.
Kiro is AWS's agentic development environment. It started as an IDE built on Code OSS, the open source base of VS Code, and is now one agent across several surfaces: the IDE, a terminal CLI, a web app that runs sessions in cloud sandboxes, an iPhone app in preview, and Kiro Crew, an always-on agent workspace.
Its defining idea is spec-driven development. Before the agent writes code, Kiro turns a prompt into requirements, a design, and a sequenced task list, and steering files and hooks keep that agent consistent across a project. IDE 1.0, in August 2026, added Agent Focus, a layout for running several sessions in parallel.
Saggar is not an agent and brings no model. It runs the agent CLIs you already pay for in real terminals on a Mac, reads what each one is doing, and tells you which session needs you next. The comparison is less about which is better than about whether you want Kiro's agent or a place to supervise several of your own.
What Kiro does well
- Specs as the unit of work: requirements, a design, and implementation tasks written before code, which suits larger changes better than a single prompt.
- Steering files, hooks, MCP servers, and custom agents, kept in .kiro/ and shared across the IDE, CLI, and web.
- Parallel sessions in the IDE's Agent Focus layout, with status in the sidebar and notifications when an agent needs input or approval.
- Cloud sessions that keep working in a managed sandbox when your laptop is closed, reachable from the web, the CLI, the IDE, and the iPhone app.
- A choice of Claude and open-weight models, or an Auto mode that picks one, with a free plan to start.
- Enterprise controls through AWS IAM Identity Center, and the IDE, CLI, and web on macOS, Windows, and Linux.
Where Saggar takes a different line
- Saggar brings no model, no agent, and no credits. It runs Claude Code, Codex, OpenCode, and other agent CLIs exactly as their makers ship them.
- Prompts, failures, and finished work form one priority-ordered queue across every project, walked with ⌘J, rather than per-session notifications.
- The phone app reaches the terminals on your Mac, not only sessions running in a cloud sandbox. Pairing is gated on your account and approved at the Mac.
- No account to use the Mac app. Sign in only when you want your phone to reach it.
- A native Mac app in Swift and SwiftUI, meant to sit beside whatever editor you use, with a monitor dock for dev servers and project state in .saggar/.
Side by side
YesPartlyNo
| Saggar | Kiro | |
|---|---|---|
| Native Mac appA real Mac window with menus, keyboard shortcuts, split panes, and themes — not a text UI or a web view. | Yes. Swift and SwiftUI, built against macOS 26.Swift and SwiftUI, built against macOS 26. | No. The IDE is built on Code OSS, VS Code's Electron base. The CLI runs in whatever terminal you use.The IDE is built on Code OSS, VS Code's Electron base. The CLI runs in whatever terminal you use. |
| Status without lookingEach session says what it is doing, so you don't read five transcripts to find the one that stopped. | Yes. Needs you, working, idle, finished, or failed, re-read every two seconds.Needs you, working, idle, finished, or failed, re-read every two seconds. | Yes. Sessions show live status in the IDE sidebar and on session tabs.Sessions show live status in the IDE sidebar and on session tabs. |
| One ordered attention queueEverything waiting on a decision, collected in priority order and walkable from the keyboard. | Yes. Prompts, failures, and finished work form one queue. ⌘J walks it.Prompts, failures, and finished work form one queue. ⌘J walks it. | Partly. Notifications when an agent needs input or approval, which you choose in settings. No single ordered walk.Notifications when an agent needs input or approval, which you choose in settings. No single ordered walk. |
| Answer from your phoneRead a session and reply to its prompt while you are away from the Mac. | Yes. The Saggar iPhone app, in TestFlight beta. Pair once by scanning a QR code.The Saggar iPhone app, in TestFlight beta. Pair once by scanning a QR code. | Partly. An iPhone app in preview, on paid plans. It reaches cloud sessions, not agents running on your machine.An iPhone app in preview, on paid plans. It reaches cloud sessions, not agents running on your machine. |
| Work survives a disconnectAgents keep running when the network drops, the lid closes, or the machine restarts. | Partly. Sessions and scrollback are restored, and idle sleep is held off while work needs you. A closed lid still stops it.Sessions and scrollback are restored, and idle sleep is held off while work needs you. A closed lid still stops it. | Partly. Cloud sessions keep working with the laptop closed, on paid plans. Local IDE and CLI agents stop with the machine.Cloud sessions keep working with the laptop closed, on paid plans. Local IDE and CLI agents stop with the machine. |
| Project workspaceBranch, worktree, dirty files, listening ports, notes, and startup commands, kept per codebase. | Yes. Tracked live, and stored in .saggar/ beside the code where agents can read it.Tracked live, and stored in .saggar/ beside the code where agents can read it. | Yes. Specs, steering files, and hooks per project in .kiro/, inside a full editor workspace.Specs, steering files, and hooks per project in .kiro/, inside a full editor workspace. |
| Works without an accountInstall it and use it without signing in to anything. | Yes. The Mac app needs no account. Sign in only when you want your phone to reach it.The Mac app needs no account. Sign in only when you want your phone to reach it. | No. Setup signs you in with Google, GitHub, AWS Builder ID, or your organization. A free plan is available.Setup signs you in with Google, GitHub, AWS Builder ID, or your organization. A free plan is available. |
| Open sourceYou can read the code, fork it, and keep it if the company stops. | No. Closed source.Closed source. | Partly. Kiro Crew is Apache-2.0. The IDE, CLI, and agent harness are closed.Kiro Crew is Apache-2.0. The IDE, CLI, and agent harness are closed. |
| Runs beyond macOSLinux and Windows, for people who don't work on a Mac. | No. macOS 26 Tahoe or later, on Apple silicon.macOS 26 Tahoe or later, on Apple silicon. | Yes. macOS, Windows, and Linux, plus web and iPhone.macOS, Windows, and Linux, plus web and iPhone. |
Claims about Kiro come from its own documentation and were last checked in August 2026. If something here is out of date, tell us and we will fix it.
Which one
Pick Kiro
Choose Kiro if you want one agent that plans from a spec, writes the code, and opens the pull request, if your team runs on AWS and wants IAM Identity Center, if you need Windows or Linux, or if you want work to continue in the cloud while your laptop is shut.
Pick Saggar
Choose Saggar if you work on a Mac, have already picked your agent CLIs, and the hard part is knowing which of six sessions needs you next, including from your phone.
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