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# How to pronounce LLM eval + observability tools

Braintrust, LangSmith, Langfuse, Helicone, PostHog, Ragas — LLMOps tool names.

Once you're running LLM apps in production you'll hit the eval and observability layer. Most tool names compound around 'lang', 'fuse', or 'helicone' — each pronounced differently than it looks.

Word | Audio | Respelling | IPA | Category
--- | --- | --- | --- | ---
braintrust |  | BRAIN trust | `/ˈbreɪn trʌst/` | tool
langsmith |  | LANG smith | `/ˈlæŋ smɪθ/` | tool
langfuse |  | LANG fyooz | `/ˈlæŋ fjuːz/` | tool
helicone |  | HEL ih kohn | `/ˈhɛ lɪ koʊn/` | tool
posthog |  | POST hog | `/ˈpoʊst hɒɡ/` | tool
RAGAS |  | rag us | `/ˈræɡəs/` | product
Comet |  | com et | `/ˈkɒmət/` | product
MLflow |  | M L flow | `/ˌɛm ɛl ˈfloʊ/` | product

Tap a word to open its full dictionary entry — every page has audio, alternate readings, sources, and CLI examples.

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