Question: Is there a writing platform that allows collaboration with others and has features like content clustering and custom style generation?

If you're looking for a collaborative writing tool with some higher-end features, Moonbeam could be a good fit. It's got real-time feedback and editing with Smart Chat, content clustering, and a Custom Style Generator. It's also got Collaboration Mode for working with others and a variety of templates for technical documentation and social media posts. It costs $49/month to $99/month per user, with a 30-day money-back guarantee.

Another contender is Craftly, an AI writing assistant geared for high-quality content. It's got collaboration tools like project management, versioning and tracking, so it's good for teams. Craftly also lets you customize content with parameters for tone, audience and language, and it works with more than 25 languages. Pricing starts at $29/month for individuals and scales up to custom Enterprise plans, and you can try it for free for 5 days.

TextCortex is another option. This AI-platform is designed to boost productivity by combining the knowledge of multiple users and providing real-time insights. It's customizable with style and tone controls, has a generative search function and integrates with more than 30,000 apps and websites. It's good for overcoming writer's block and speeding up writing, with a free plan and several paid options to suit your needs.

Last is Reword, which offers personalized writing assistance and integrates with common content management systems and supports more than 25 languages. It's got tools like Cowriter for coauthoring and SEO Optimization, and a desktop app for a more immersive writing experience. It costs $48/month for individuals and small teams, and you can try it for free for 7 days.