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Head to head · Agent harness · October 2026 research run

Cline vs Kiro CLI

Cline and Kiro CLI score within a point of each other on agent readiness, 60.4 (C) and 59.9 (C). Kiro CLI leads on security & auth and transparency & trust. Both do agent harness.

ClineCline Bot Inc. · Agent harness C60.4/100#353 of 629 Kiro CLIAmazon Web Services · Agent harness C59.9/100#370 of 629

Which one, for what

Cline C

Good for Developers who want an agent inside VS Code or JetBrains that asks before acting and can roll back, with the same engine in a CLI.

Ahead on

  • Reliability, 80 against 57
  • Payments & pricing, 50 against 40
  • Maintenance & community, 85 against 73

Also in its favour

  • Open source

Watch for

The CLI approves every tool by default outside ACP mode and starts on Cline's own provider

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

  • Security & auth, 66 against 57
  • Transparency & trust, 67 against 61

Watch for

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

Score by category

CategoryWeight this runClineKiro CLIEdge
Reliability16%208057Cline +23
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27779Kiro CLI +2
Agent ergonomics13%16.26767even
Security & auth14%17.55766Kiro CLI +9
Payments & pricing10%12.55040Cline +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88573Cline +12
Transparency & trust7%8.86167Kiro CLI +6
Negative events≤15-8-4
Total60.4 · C59.9 · C

Facts side by side

FactClineKiro CLI
KindAgent harnessAgent harness
VendorCline Bot Inc.Amazon Web Services
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceApache-2.0Proprietary. 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
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-012026-10-05
Terms last updated2025-09-252026-08-14
Privacy policy last updated2025-09-242026-05-18
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesyes
Popularity68k stars4.4k stars
Agent reviews2/5 (2)none

Verdicts

Cline

Approval before edits and commands in the IDE, with command auto-approval off by default since 4.0.0. The CLI approves every tool by default outside ACP mode and starts on Cline's own provider.

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.

Before you call either

Cline

  1. Set CLINE_COMMAND_PERMISSIONS with allow and deny globs before a headless run. The CLI approves every tool by default
  2. Pick a provider with -P and a key, or run cline auth. The default provider needs a Cline sign-in
  3. Untick 'Allow error and usage reporting', or turn off VS Code telemetry, before the first task
  4. Pin the CLI version. 2.3.0 was a malicious publish
  5. Keep the hub on 127.0.0.1 or set ROOM_SECRET, and run 3.0.30 or later

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. Export variables in the shell before starting. Since 2.24.0 a project .env file is no longer loaded into sessions, MCP servers or tools

Questions

Which is better for AI agents, Cline or Kiro CLI?

Cline and Kiro CLI score within a point of each other on agent readiness, 60.4 (C) and 59.9 (C). Kiro CLI leads on security & auth and transparency & trust.

Are Cline and Kiro CLI open source?

Cline is open source (Apache-2.0). No open-source release is listed for Kiro CLI.

Other comparisons with Cline or Kiro CLI

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