Updated March 27, 2026
Turns everyday words and actions into usable training data — converting natural-language interactions into structured datasets for model training.
State-of-the-art embedding models and rerankers for search, retrieval, and RAG. Acquired by MongoDB for $220M.
Core capabilities each platform advertises.
What each tool does well, and the limitations to keep in mind.
Pros
Cons
Pros
Cons
Choose Luel if you wantChoose if you want
Choose Voyage AI if you wantChoose if you want
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 500+ models through one gateway.
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