Question: Is there a tool that allows me to update my email campaigns in real-time to reflect changing inventory levels or customer behavior?

One good option is Liveclicker, a real-time email marketing and personalization service that works in conjunction with your existing ESP. It offers live promotions, videos and countdowns, and real-time updates based on inventory levels and customer behavior. It's designed to increase engagement and get people to click, which is good if you want to get the most out of your email campaigns.

Another good option is Zembula, which uses existing data to update content in real-time. Its Smart Banner and Smart Block components are easy to set up and customize to show personalized CTAs and content blocks. Zembula offers multichannel personalization for email, SMS, push notifications and websites so you can offer a personalized experience to your customers regardless of how they're interacting with you.

If you want a broader marketing foundation, check out ActiveCampaign. It offers personalized email marketing, automation and sales engagement with more than 900 native integrations. It uses AI-powered automations to personalize and automate marketing campaigns, helping businesses better engage with customers and nurture their audience.