the demo didn't work for me (could be on my end) but the problem is real (and growing quickly) and the ideas/solutions presented are quite promising. it might be worth looking at Jericho Security (https://www.jerichosecurity.com/) for inspiration for parts of this (seed startup solving similar problems).

The problem is known and definitely real. Scams are a persistent issue so this is definitely solving a real problem. Have a demo that works is also a plus.

It's hard for me to judge how effective this would be because you're essentially trying to solve several difficult problems at the same time: Message coordination across multiple apps, UX to nudge consumers to be less susceptible to scams and scam detection across modalities at scale. Scams also rely on a very low success rate with high payoff, so it'll be hard to find datapoints and iterate. Also keep in mind that you'd be competing not just with new anti-AI scam detection solutions, you're competing with existing in-house solutions to catch scams deployed at big tech platforms, as well as experienced cybersecurity professionals.

For the purpose of a product/demo (although again, good that you have a demo), I recommend solving one very specific problem that would've otherwise been intractable without your approach, and then either solving it and iterating to more general solutions, or pivoting to something else if it proves too intractable. Solving too many things at once is difficult.

I won't really comment on technical feasibility because currently most of the problems you're trying to solve do seem to be UX problems, and the stack seems relatively straightforward, if requiring high robustness.

Interesting market. Scams are indeed a real problem, and especially one that causes distress and trauma for many people affected. I think I would have three suggestions for the current approach: 1) An app that monitors all of your communication channels is just majorly invasive and raises major privacy and data security concerns. 2) Your current target group of elderly people is incredibly hard to sell to, as they often are not within the digital space and their tech is oftentimes up to date -> would your solution work with a landline? Or how would you sell to those demographics -> going via (younger) relatives that care might be best here. In general I really like the aspect of notifying third parties such as relatives and friends in case of a scam, this seems like something I haven't seen much and could also see in a context, where people would want to easily share e-mails or messages that they find suspicious. 3) In other markets (esp. corporate) I feel like there is a lot of competition already focused on this (not to say there isnt room for a startup to innovate)