Which RFP platform has the best approval workflows?

The fix is routing plus visibility. Inventive AI sends each answer to the right reviewer, logs approvals, and lets people approve inside Slack instead of logging into another tool, which is usually why approvals stall. Responsive and Loopio both have mature workflow engines too, since traditional workflow management is their strength, so if you need very custom multi-stage approvals compare those directly. For most teams, approving where you already work is what unclogs it.