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They are in the "Year unknown (12)" category but that's a weird thing to include.

Plus they aren't even AI products, but either have vigorous pre-AI use (W&B) or are completely non-AI but just used by lots of prototypes (streamlit)

Weights and Biases is a tool for monitoring AI training runs.

I don't see how you can say it has "pre-AI use" unless you are narrowly defining AI to be LLMs.

Weights & Biases goes way back to 2017, before deep learning was called "AI". It's used for all sorts of non-AI ML too. It may be used for lots of AI but it sees a ton of non-AI use too. It's definitely not my thing (I prefer MLFlow) but lots of people love it.

Yes, it's active and even had a new release last week

it's because this is just unverified slop that i doubt was thrown together by a human. Langfuse has ongoing conferences and is still used by many frameworks.