bgp tools for route optmization based on(performance, cost and reliability

Hi all,

Looking for tools to optimize bgp routes based on performance, cost and
reliability. Paid, open source, doesn't matter. Even presentations or
research papers on performing tasks are welcome. But not configuration
guides on multihoming :slight_smile: Specifically in the context of a hosting provider
who's multihomed to several tier 1's.

What tools do you use for such optimization and just every day maintenance?