If you're looking for a different Nolan alternative, SAGA is well worth a look. It's a full-featured writing room app geared for film production, with tools for writing screenplays, creating characters and generating storyboards. Saga uses generative AI to try to help you overcome writer's block and flesh out your story with prompts tailored to your own style, customizable beat sheets, and the ability to generate action descriptions and dialogue. Its Storyboard Wizard lets you construct shots with interactive pre-visualization tools, too, so it's a good option for trying to get a handle on the look of your movie.
Another good option is AIScreenwriter. This AI-based screenwriting tool can help you brainstorm ideas, lay out a screenplay, and create story outlines and character sheets. It has some higher-end features, too, like real-time editing, multilingual support and the ability to generate content dynamically so you can get immediate feedback. AIScreenwriter is good for both beginners and pros, so it's good for whatever stage you're at in your creative process.
If you're looking for a tool to help you fill the talent gap and get past your creative block, Plotdot has a lot of features to help you write a script from idea to finished product. It's got tools to generate ideas, define premises, create protagonists and antagonists, and flesh out supporting characters. Plotdot comes in a few different pricing levels, so you should be able to find a plan that works for you and your budget.
Last is Katalist, an AI-based tool that can turn your ideas into visual stories for filmmakers, advertisers and content creators. It can automate the creative process by analyzing scripts and generating visuals, characters and scenes. Features like script-to-storyboard conversion, AI character consistency and dynamic scene generation can help you get a handle on content creation and make your script look more polished, so it's good for pitchers and filmmakers.