campaigns. ActiveCampaign has the very best deliverability in the organization. This wasn’t readily obvious to me. I do believe MailChimp had great deliverability, and I once had a deliverability concern with ActiveCampaign( that assistance quickly corrected for me). But according to a recent report by Email Tool Tester, ActiveCampaign leads the industry with a 97 %deliverability rate. ActiveCampaign has advanced tiers of service.