Given that CloudMQTT is shutting down and alternatives like CloudAMQP are available, present this competition to your current supplier to leverage better pricing or terms. Highlight any offers from CloudAMQP that indicate savings or enhanced functionality that could sway your decision.

As you transition from CloudMQTT, emphasize the need for any new service to meet your existing security requirements and mention that multiple suppliers now include enhanced security or compliance features at no additional cost. This can create leverage for negotiating better terms.

Negotiate to remove any auto-renewal clause from your upcoming contract, especially since CloudMQTT is ending. This will give you flexibility as you explore alternatives, ensuring you are not locked into a service you're no longer satisfied with or that may no longer exist.

As you transition away from CloudMQTT, identify any potential overage fees associated with your usage. Emphasize your company's growth and potential to retain your business in the new platform while negotiating the elimination of such fees.

Given that you may need a larger messaging service as you migrate, communicate your growth potential clearly with the supplier. This can incentivize them to provide better rates for a larger number of users, as volume often brings cost reductions.