cloud.google.com
In short: Google Cloud Marketplace (cloud.google.com) accepts public integrated saas listing. It is not stated to submit, takes a moderate amount of preparation, and scores 80/100 on our impact ranking (high impact).
Become a Google Cloud vendor and integrate your tool as a Marketplace-billed SaaS product.
Product must run on Google Cloud, support account and billing integration, and pass business/technical review.
Priority is high, which sets the band. It is not stated and moderate to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.