Nomic

Nomic is known for open-weight embedding models that anyone can run, plus Atlas, a tool that maps millions of documents or images into an explorable visual space. You can spot clusters, outliers and duplicates at a glance.

Its embedding models are fully open, including training data and code, which is rare. That transparency appeals to researchers.

Use Nomic when you want embeddings you can host yourself or need a visual way to understand a dataset.