Gamma is the fastest — paste your content or a prompt and it builds a complete presentation in under 60 seconds. Beautiful.ai is better for polished business presentations with more design control.
Yes — SlidesAI creates Google Slides automatically. ChatGPT can write all the content for each slide which you then paste into PowerPoint or Google Slides.
Gamma has a free plan that includes AI-generated presentations. The free tier has a watermark and limited exports. Paid plans start at $8/month and remove all restrictions.