Here are some random ideas I've been thinking about, maybe some of it would be useful to you:
Possible monetization strategies:
You mentioned "paid promotion of packages" as a way to monetize, what I had in mind is a bit different: on-premise installation. You provide tools to scan an entire Github org then build your UI based on that. Besides vetting, there are plenty of features you could add:
- Blocklists: it is common for companies to have a list of packages you cannot use. It could be based on a number of criteria like authors, licenses, collaborators, etc. We have one in Confluence and I always forget to look it up.
- Commenting/Rating: When looking at a dependency, I usually do a Github search to find other teams that use it and ask them about their experience. Sometimes there are specific caveats that you can't find online; sometimes, we already have a fork that we need to use instead. A tool where I can see all projects using a particular package, internal comments, rating, and maybe even integration code samples would certainly be welcome.
- Security vulnerabilities: While there are plenty of startups in this area, most of them appeal to the security org and not the engineers. If you integrate the security component into the vetting process, I think you can touch a bigger audience.
- Fork maintenance: forks are a pain to maintain and keep up to date. Sometimes you forget why you had a fork in the first place. I'm not entirely sure how this would look like, but I think it's worth exploring.
Challenges:
- Github has been doing an excellent job recently. Building all this out is way simpler for them since they own the source data. Don't be surprised if they take you out of business by implementing similar features. Have a backup plan for when (not if) this happens.
- Github API rate limits: 5000 requests per hour is not much, it may be enough for one language, but you eventually have to add more. If you were thinking of using the user's OAuth tokens, plan on having a robust security practice, because it will be scrutinized.
- The single most important metric, in my opinion, is not present in your tool: The total number of dependencies. The flaws in direct dependencies are just as bad as flaws in indirect ones, and while I can quickly look at the package.json to determine the first level, there is no simple way to see/vet all transitive dependencies.
I wish you the best of luck and I think you have something here, but I suggest spending some time on your monetization strategy before you go any further.