# Kiro CLI vs Prime Agent (slim)

> Prime Agent and Kiro CLI score within a point of each other on agent readiness, 60.5 (C) and 59.9 (C). Kiro CLI leads on schema & documentation and security & auth. Both do agent harness. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.md (~2,500 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.json · canonical https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Prime Agent and Kiro CLI score within a point of each other on agent readiness, 60.5 (C) and 59.9 (C). Kiro CLI leads on schema & documentation and security & auth. Both do agent harness.

- Kiro CLI: C 59.9, rank #370 of 629 · https://www.anchorterminal.com/tools/kiro-cli.min.md
- Prime Agent: C 60.5, rank #352 of 629 · https://www.anchorterminal.com/tools/prime-agent.min.md
- Kiro CLI, 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 Schema & documentation, 79 against 42; Security & auth, 66 against 50.
- Prime Agent, good for Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine. Ahead on Reliability, 65 against 57; Agent ergonomics, 73 against 67; Payments & pricing, 60 against 40; Maintenance & community, 79 against 73. Also No key needed to call it; Open source; No incidents deducted, where Kiro CLI loses 4 points for them.

| Category | Kiro CLI | Prime Agent |
| --- | --- | --- |
| Reliability (16%) | 57 | 65 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 79 | 42 |
| Agent ergonomics (13%) | 67 | 73 |
| Security & auth (14%) | 66 | 50 |
| Payments & pricing (10%) | 40 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 73 | 79 |
| Transparency & trust (7%) | 67 | 64 |

| Fact (where they differ) | Kiro CLI | Prime Agent |
| --- | --- | --- |
| Vendor | Amazon Web Services | Prime Intellect |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| 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 | MIT |
| llms.txt | yes | no |
| Last release | 2026-10-05 | 2026-10-07 |
| Terms last updated | 2026-08-14 | no date given |
| Privacy policy last updated | 2026-05-18 | no date given |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Popularity | 4.4k stars | 22k stars |