Comparison
Evaluation Context Protocol (ECP) vs Stele
A factual side by side of two tools in AI Agents & Automation. Figures come from each product’s own site.
Evaluation Context Protocol (ECP)
ListedECP is a vendor-neutral JSON-RPC protocol for grading agent outputs, tool calls, and audit context across frameworks, models, and CI systems.
Stele
ListedShared memory for AI coding agents. Claude Code, Cursor and Codex read what your project already decided, so context survives between tools and sessions.
| Evaluation Context Protocol (ECP) | Stele | |
|---|---|---|
| Category | AI Agents & Automation | AI Agents & Automation |
| Pricing model | Not disclosed | Freemium |
| Starting price | Not disclosed | Not disclosed |
| Free tier | No | Yes |
| Platforms | Not disclosed | Not disclosed |
| Techavy score | Not rated yet | Not rated yet |
About Evaluation Context Protocol (ECP)
ECP is a vendor-neutral JSON-RPC protocol for grading agent outputs, tool calls, and audit context across frameworks, models, and CI systems. ECP gives evaluators a common way to inspect what an agent returned, what tools it used, and what audit evidence it exposed, independent of the framework that built the agent or the platform that runs the test. tool_calls Did the agent call the required tool with the right arguments?. ecp run --manifest Can this run in CI and fail a build?.
About Stele
Shared memory for AI coding agents. Claude Code, Cursor and Codex read what your project already decided, so context survives between tools and sessions. Only one of these agents knows this was tried last spring and rolled back. KNOW-142 : a captcha on checkout shipped last spring and was reverted after two weeks. The bot traffic is real, though it spikes on release days and is quiet the rest of the time. A gate armed only during a release window would avoid repeating that.
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