g2.com
In short: G2 (g2.com) accepts vendor profile/reviews. It is free + paid tier to submit, takes a moderate amount of preparation, and scores 81/100 on our impact ranking (high impact).
Create seller profile and list product if eligible.
Needs B2B SaaS positioning and review collection.
Priority is high, which sets the band. It is free + paid tier and moderate to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.