If you're looking for another Tiptap alternative, Bit.ai is worth a look. It's an AI-powered document collaboration tool with advanced design abilities, real-time collaboration and smart editing features. The service also has AI-powered writing, interactive living documents and a range of integrations, so it's good for knowledge management and collaboration.
Another option is Narrato, which packages AI tools to help you create content more easily. It includes an AI Content Assistant, automated content workflows, inline commenting and collaboration tools. Narrato is for content marketers and teams that want to create high-performing content without so much extra work.
If you need something more scalable, check out Sanity. It's a flexible, collaborative content management system with real-time collaboration, an extensible editing interface and APIs that integrate with services like Shopify and Mux. Sanity is good for e-commerce, marketing sites and other digital projects, and it offers a broad foundation for handling constantly changing digital products.
Last, Payload is an open-source, headless CMS written in TypeScript and React that offers AI-powered content generation, visual editing and customizable components. It supports real-time collaboration and offers a flexible foundation for building custom business applications, so it's a good option for agencies and developers.