If you're looking for Postie alternative, Adobe Marketo Engage is worth a look. The marketing automation, account-based marketing, lead management and email marketing service also offers AI-powered marketing automation and predictive audiences. It's geared for B2B marketing and tightly integrated with other Adobe products.
Another option is Listrak, which offers a unified platform for email, SMS, social media, push notifications and direct mail marketing. It has features like journey management, email automation, predictive analytics and customer insights, and is designed for retailers and brands that want to improve customer engagement and revenue.
Last is Blueshift, an AI-powered marketing service that marries customer data with AI-powered decision making across multiple channels. It includes a Customer Data Platform and offers predictions and recommendations, and could be a good fit for companies that want to better segment customers and improve marketing efficiency.