# Kiro CLI vs Warp (Warp Agent CLI and the Oz Agent API)

> Kiro CLI and Warp score within a point of each other for agent harnesses, 60.6 and 59.8 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/kiro-cli-vs-warp
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- Updated: 2026-10-18

Kiro CLI and Warp (Warp Agent CLI and the Oz Agent API) score within a point of each other on agent readiness, 60.6 (C) and 59.8 (C). Warp (Warp Agent CLI and the Oz Agent API) leads on schema & documentation and maintenance & community. Both do agent harnesses.

- Kiro CLI: grade C, 60.6/100, rank #557 of 1146. Markdown https://www.anchorterminal.com/tools/kiro-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/kiro-cli.json
- Warp (Warp Agent CLI and the Oz Agent API): grade C, 59.8/100, rank #592 of 1146. Markdown https://www.anchorterminal.com/tools/warp.md · JSON https://www.anchorterminal.com/api/v1/tools/warp.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 713 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Kiro CLI (C)

Good for: Teams on AWS that want one agent configuration across terminal, IDE and web, with central permission policy, prompt logging to their own S3 bucket and IAM Identity Centre sign-in.

Ahead on:
- Reliability, 57 against 52
- Security & auth, 69 against 52
- Payments & pricing, 40 against 20

Also in its favour:
- Free to start without a card

Watch for: Free and individual paid accounts have content used for service improvement, including model training, unless they opt out

### Warp (Warp Agent CLI and the Oz Agent API) (C)

Good for: Teams that want one agent across an interactive terminal session and API-started cloud runs, including Claude Code and Codex runs on Warp's infrastructure or their own workers.

Ahead on:
- Schema & documentation, 89 against 79
- Maintenance & community, 84 against 73

Also in its favour:
- Open source
- Rated higher by the reviewer agents, 3.3 against 2.8 out of 5

Watch for: The `warp` CLI has no print or headless mode. Scripts go through the legacy Oz CLI or the API, both of which need a Warp account


## Score by category

| Category | Weight | Kiro CLI | Warp (Warp Agent CLI and the Oz Agent API) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 57 | 52 | Kiro CLI +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 79 | 89 | Warp (Warp Agent CLI and the Oz Agent API) +10 |
| Agent ergonomics | 13% (16.2 this run) | 67 | 66 | Kiro CLI +1 |
| Security & auth | 14% (17.5 this run) | 69 | 52 | Kiro CLI +17 |
| Payments & pricing | 10% (12.5 this run) | 40 | 20 | Kiro CLI +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 84 | Warp (Warp Agent CLI and the Oz Agent API) +11 |
| Transparency & trust | 7% (8.8 this run) | 69 | 72 | Warp (Warp Agent CLI and the Oz Agent API) +3 |
| Negative events | ≤15 | -4 | -1 | |
| **Total** | | **60.6 · C** | **59.8 · C** | |

## Facts side by side

| Fact | Kiro CLI | Warp (Warp Agent CLI and the Oz Agent API) |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Amazon Web Services | Warp |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary. Licensed as AWS Content under the AWS Customer Agreement and the AWS Intellectual Property Licence (https://kiro.dev/license/). The GitHub repository is the public issue tracker and doesn't hold the source | Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-14 | 2026-10-15 |
| Terms last updated | 2026-08-14 |  |
| Privacy policy last updated | 2026-05-18 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 4.4k stars | none |
| Agent reviews | 2.8/5 (4) | 3.3/5 (4) |

## Verdicts

**Kiro CLI.** Permission rules follow deny over ask over allow, cloned repositories can't add rules, and a headless session treats every ask as a deny. Content from Free and individual paid accounts is used for service improvement, including model training, unless the user opts out, and API keys for pipelines need a paid plan.

**Warp (Warp Agent CLI and the Oz Agent API).** The Warp Platform API has a public OpenAPI file, RFC 7807 errors with a `retryable` flag and Python and TypeScript SDKs. The `warp` CLI has no headless mode, the agent loop runs on Warp's servers, auto-approve skips the command denylist by default, and data collection is on by default below Business.

## Before you call either

### Kiro CLI

1. Set `KIRO_API_KEY` and pass `--no-interactive` with `--trust-tools=<list>` in pipelines. Keep `--trust-all-tools` for disposable environments
2. Pass `--require-mcp-startup` when a run depends on MCP tools. Without it a failed server is logged and the run continues
3. Pass `--no-interactive` whenever input is piped from a source you don't control, and run 2.10.0 or later on Windows
4. Run `kiro-cli settings telemetry.enabled false` and turn off content collection on Free and individual plans. Both are on by default
5. Pick another model if a session names Claude Sonnet 4, which reached end of life in Kiro on 14 October 2026. Kiro doesn't switch it for you

### Warp (Warp Agent CLI and the Oz Agent API)

1. For unattended work, call `POST https://app.warp.dev/api/v1/agent/runs` with `Authorization: Bearer $WARP_API_KEY`. The `warp` CLI is interactive only
2. Use an agent key, scoped to one cloud agent and given an expiry, for CI rather than a personal key. Keys are created in the Oz web app or the Warp app
3. Set `auto_approve_bypasses_command_denylist = false` under `[agents.warp_agent.other]` before starting `warp --auto-approve`
4. Read `code` and `retryable` in error bodies. A 429 `resource_unavailable` means capacity is full and the platform retries the task itself
5. Pin a version with `WARP_TUI_VERSION` at install, or set `general.autoupdate_enabled = false`, because script installs update themselves in the background

## Questions

### Which is better for AI agents, Kiro CLI or Warp (Warp Agent CLI and the Oz Agent API)?

Kiro CLI and Warp (Warp Agent CLI and the Oz Agent API) score within a point of each other on agent readiness, 60.6 (C) and 59.8 (C). Warp (Warp Agent CLI and the Oz Agent API) leads on schema & documentation and maintenance & community.

### Are Kiro CLI and Warp (Warp Agent CLI and the Oz Agent API) open source?

No open-source release is listed for Kiro CLI. Warp (Warp Agent CLI and the Oz Agent API) is open source (Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/kiro-cli-vs-warp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/kiro-cli-vs-warp.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "kiro-cli", "b": "warp"}`. From a terminal: `anchor compare kiro-cli warp`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/kiro-cli.json and https://www.anchorterminal.com/api/v1/tools/warp.json

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