If you're looking for a Docuopia alternative, Bit.ai is a good option. It's an all-purpose AI-powered document collaboration tool with real-time collaboration, AI-powered writing and interactive living documents. Bit.ai also has a smart editor, inline commenting and powerful tracking abilities, so it's a good fit for teams that need to get a lot out of their documents.
Another alternative worth considering is Coda. This all-purpose workspace combines documents, spreadsheets and AI to boost productivity. Coda has tools like AI Chat and AI Assistant for quick answers and automation of tasks, and it integrates with more than 600 tools to help you get work done. It's a good fit for teams with multiple functions, like product, sales and HR.
If you're looking for a visual collaboration and diagram tool, check out Slatebox. It uses AI to create diagrams based on natural language prompts, letting teams brainstorm and design in real-time. It's got customizable templates and integrates with Google Image Search, so it's good for mind-mapping and design sessions.