Question: I need a solution that enables users to build and share their own interactive stories with a community of creators.

If you're looking for a way to build and share interactive stories with a community, StoryNest.ai is a great option. This AI-based platform has a variety of tools to craft compelling stories, including character generation, world-building and AI-assisted editing. It can handle a variety of formats, from short stories to screenplays, and accommodates collaboration with other writers, so it's a good option for writers.

Another good option is PlotPilot, which is geared for interactive storytelling with AI-boosted graphics and sound. You can create your own characters and drop them into stories, making choices that change the plot. PlotPilot also encourages community sharing, so creators can participate and build on each other's stories. It's available on mobile devices now, with a version coming to Google Play later, and it's free to use as much as you want.

NovelAI is a subscription-based service that uses AI to tell stories and to be a virtual companion. It comes with features like character visualization, interactive fiction modules and a customizable editor. With several pricing levels, it can accommodate different needs and budgets, so it's a good option for those who want to create more elaborate stories.

Last, AI Adventure is an open-source text-based RPG platform that uses sophisticated AI for storytelling. It offers a lot of customization and the ability to share custom adventures. With built-in support for easy transactions and community-created content, it's a good place for collaborative storytelling.