The classic build or buy. It seems we'd be one of the first SaaS products in the space, but I've heard of a few open-source projects as well. Is there any site

The classic build or buy. It seems we'd be one of the first SaaS products in the space, but I've heard of a few open-source projects as well. Is there any site that ties open-source programs to their equivalent SaaS product? That would be very interesting to look at, to see what went into building these various SaaS products.