If you're looking for another PPTX.ai alternative, MagicSlides is definitely worth a look. This AI-powered presentation tool can create presentations from text, YouTube videos, PDFs and even Docx files, and offers a variety of ways to integrate with Google Slides, PowerPoint and Figma. It supports more than 100 languages and offers a range of pricing tiers to suit your needs, including a free tier with up to three presentations per month.
Another good option is Sendsteps, which is geared to help you create presentations that are engaging and interactive. The tool offers features like quizzes, word clouds and live Q&A that can help keep your audience interested. It can export to PowerPoint, and you can try it out with a free tier that includes two AI presentations, so it's a good option if you want to try out presentation tools without breaking the bank.
If you want a tool with a lot of customization options, Powerpresent could be a good fit. It offers a variety of art styles to customize your presentations, and its pay-as-you-go pricing could be more adaptable to your needs. Presentations can be exported to Google Slides or PowerPoint, so you can continue to refine your designs.