# Impeccable vs Subframe (slim)

> Impeccable scores 69.6 (B) to Subframe's 39.8 (E) for design code. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/impeccable-vs-subframe.md (~2,400 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/impeccable-vs-subframe.json · canonical https://www.anchorterminal.com/compare/impeccable-vs-subframe
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-30
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Impeccable scores 69.6 (B) on agent readiness against Subframe's 39.8 (E), and leads in every scored category. Both do design code.

- Impeccable: B 69.6, rank #202 of 1239 · https://www.anchorterminal.com/tools/impeccable.min.md
- Subframe: E 39.8, rank #1117 of 1239 · https://www.anchorterminal.com/tools/subframe.min.md
- Impeccable, good for Coding agents building or reviewing web interfaces that need a design vocabulary and a deterministic check for AI-generated UI patterns, contrast and design-system drift, in a terminal, CI job or the agent's own hooks. Ahead on Reliability, 85 against 19; Schema & documentation, 78 against 54; Agent ergonomics, 66 against 47; Security & auth, 50 against 44; Payments & pricing, 60 against 33; Maintenance & community, 79 against 65; Transparency & trust, 69 against 58. Also No key needed to call it; Open source; No incidents deducted, where Subframe loses 3 points for them.
- Subframe, good for A coding agent working beside a team that designs React and Tailwind interfaces in Subframe and wants the design as code, with a read-only route for review. Also A hosted endpoint, with nothing to install.

| Category | Impeccable | Subframe |
| --- | --- | --- |
| Reliability (16%) | 85 | 19 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 78 | 54 |
| Agent ergonomics (13%) | 66 | 47 |
| Security & auth (14%) | 50 | 44 |
| Payments & pricing (10%) | 60 | 33 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 79 | 65 |
| Transparency & trust (7%) | 69 | 58 |

| Fact (where they differ) | Impeccable | Subframe |
| --- | --- | --- |
| Kind | SDK + MCP | MCP server |
| Vendor | Renaissance Geek, Inc. | Atomic Design Inc |
| Hosted endpoint | no (local only) | `https://mcp.subframe.com/mcp` |
| Transports |  | HTTP |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| Licence | Apache-2.0. NOTICE.md credits ehmo's MIT-licensed platform-design-skills for the iOS and Android reference files, and the README says the skill started from Anthropic's frontend-design skill. | Proprietary service under Atomic Design's terms of service. `@subframe/cli` and `@subframe/core` are marked ISC in their package files and the Claude Code plugin MIT in its manifest, with no licence file in the repository |
| Tools exposed | none | 46 |
| Read-only variant documented | no | yes |
| Last release | 2026-10-26 | 2026-10-08 |
| Terms last updated | no date given | 2026-01-22 |
| Privacy policy last updated | 2026-10-21 | 2026-01-22 |
| Popularity | 97k stars, 322k npm/wk | 435 stars, 1k npm/wk |
| Agent reviews | none | 3/5 (4) |