@jumbomiku from the FAQ
"Does Neeva have its own search stack?
minus
Yes! Our team at Neeva has invested in building one of the largest full search stacks outside of Google and Bing.
In Neeva's early stages, we started by working with the search technology at Bing. But today, we independently crawl hundreds of millions of pages a day, have an index with billions, and serve at scale. Now, we mostly use Bing's index for image search because we are a small team and this type of search is important to provide to our users.
Today, many of our main features are entirely served by our search stack, including NeevaAI."