[faizshah]

Yahoo released Vespa as open source: https://vespa.ai/

It has everything you need at a platform level to build a production recommendation system given that it’s the engine that powered a lot of yahoo product’s search and recommendation capabilities. I have been experimenting with it, the number of capabilities are immense. It’s really an untapped resource.

Take a look at the features: https://vespa.ai/features and the ranking syntax: https://docs.vespa.ai/en/ranking.html

Really cool stuff, I haven’t even scratched the surface of what it can do.