Reference
Stack & integrations (reference) →
The tools and integrations this practice is built on.
08 · Pillar
Tools & Landscape
What to actually adopt — from someone who has used the stack. Straight comparisons and landscape maps across the eval, RAG, and testing tool ecosystems. Written from hands-on use, not SEO farming.
Reference
Product & platform (reference) →
How the pieces fit into a product and platform view.
Compare
Tool comparisons →
Honest head-to-head comparisons — Promptfoo vs DeepEval, LangSmith vs Braintrust, Playwright vs Cypress, and more — each ending in a real recommendation.
Tool
Embeddable diagrams →
Free, code-native diagrams on eval metrics, RAG, and eval gates — drop them into your own docs or posts with attribution.
Glossary
Glossary — 52 terms →
Plain-English definitions of the eval, RAG, agent, and testing vocabulary, each a real page with a concrete example.
Reference
Proof index →
Every verifiable artifact behind the claims on this site, in one place.
Guide
The State of LLM Evaluation Tools in 2026 →
A 2026 map of the LLM evaluation tool landscape and how to navigate it.
Guide
Open-Source vs Commercial LLM Eval Platforms →
The real trade-off between open-source and commercial LLM eval platforms.
Guide
The Best LLM Observability Tools in 2026 →
What LLM observability is and how the 2026 tools compare.
Guide
The Best Open-Source LLM Eval Frameworks in 2026 →
A roundup of the best open-source LLM eval frameworks and what each is best at.
Continue across the library
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