Perhaps if you don't mind fuzzy hand-wavy claims that are as likely to mislead as inform, they could say "our project's source code includes no 'web-tech'. But

Perhaps if you don't mind fuzzy hand-wavy claims that are as likely to mislead as inform, they could say "our project's source code includes no 'web-tech'. But that's not the headline. The headline was instead that it's a service "without a website". But there is absolutely, positively, no-nitpicking-involved an HTTPS-accessible website for the service, set up by the service's own creators.