How would you market these two Saas apps, if you were the creators?

Hey Indies,

I have built these two Saas apps

thumbgenix.com -- An AI-powered thumbnail generator saas tool that can generate thumbnails using prompts
dubtitles.io -- This is an AI Saas tool that can auto-generate English subtitles/captions for any language YT videos/Audios(good for podcasts)

If you were the developers of these Saas apps, how would you approach your target customers and how would you market them?