Postmark vs SendGrid

Pick SendGrid if you need AI-driven email workflows beyond basic sends—its 50 tools cover list management, template operations, suppression handling, and analytics queries that let an agent troubleshoot bounces or segment campaigns without opening the dashboard. Pick Postmark if you're wiring transactional emails into a support or onboarding flow and want zero distraction: no tools means the MCP acts as a pure send pipe, which keeps your Project's surface area small and your auth scope narrow. For most teams running customer-facing automation, SendGrid's tool count justifies the setup overhead. Switching from Postmark to SendGrid after you've built workflows costs a day of re-mapping template IDs and rewriting suppression checks; going the other direction is faster but you lose the agent's ability to query delivery stats mid-conversation.