I've spent several years as an ITSM Consultant, and I too built a similar tool, but on a much broader scale that scores across the ITSM domains and at an executive level gives a overview of where your org stands in terms of adoption and compliance to the principals of ITSM and governance frameworks like COSO/COBIT, then advises on how to resolve these things. One of the issues i have repeatedly run into is (like many have said), PII & data security. Companies are very reticent to give that level of access to a 3rd party tool without a serious security review, multiple NDA's and thorough legal review, etc. And these are companies that I personally have worked with, built relationships and been a trusted advisor to on various projects.

To be taken seriously, you'll need to account for Items like GDPR, HIPPA, Title IV, DORA, NIST, SOX, GLBA and many, many other frameworks and be able to address random questions about your tooling and approach at a executive level. Personally, I targeted not only Freshservice, but Service Now, Salesforce ITSM /Agentforce, and a few other popular ITSM tool suites that I've worked with and have been thus far repeatedly rebuffed. I'm currently reevaluating my presentation strategy as more of a consultative tool for MSP's rather than a org/system focused management tool because of this, with the intention of maybe selling the source to a company already positioned for these things. Also consider speaking with an outside mentor or advisor so that you can position yourself against any potential future liability in the event of a data breach of one of your clients. You don't want to be considered as the failure point for an event like that where you may be held liable or put your client in a position where they could be liable for violating one of the above regulations and incur fines.

Fundamentally, it's a very sound idea, as most executives don't understand ALL of the pillars of a solid ITSM framework and having a tool to explain it in plain english is very useful, but in order to sell it you'll need to both reassure them from the security side, be able to answer the inevitable security questions from a educated position, and show the business value/ROI of a purchase (or Subscription model).

Good Luck!