In the beginning, Customer.io’s ease of setup feels like a win. But as you scale, challenges appear—sluggish launches, channel silos, and generic messaging. To keep pace with fast-moving audiences, you need cross-channel marketing platforms designed for speed and personalization. Here are the best Customer.io alternatives, with Questera at the top. https://www.questera.ai/blogs/top-5-customer-io-alternatives-for-cross-channel-marketing