Vespa
Yahoo's open-source search engine with vector + sparse retrieval.
Vespa is the engine Yahoo and Spotify use for real-time, mixed (vector + lexical + structured) search at massive scale. Heavy to operate, but unbeatable at scale.
Pros
- ✅ Battle-tested at huge scale
- ✅ Mixed retrieval out of the box
- ✅ Open source
Cons
- ⚠️ Steep learning curve
- ⚠️ Heavy to operate
Use cases
large-scale searchrankinghybrid retrieval
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