[gregjor]

Given the high failure rate of early stage startups (all startups, really), and knowing that choice of tech stack rarely makes or breaks the venture, pick what you or your team can use to get to MVP fastest. If you make something useful no one will care about the underlying language or framework.

For simple web sites it's still hard to beat PHP for simplicity and ease of deployment, and since it dominates web development by a wide margin you can find developers.

For building apps (mobile? desktop?) you are constrained by the tools intended for the platform -- Swift, Java, C# -- unless you have the expertise and time to do your own thing or work with a cross-platform development tool.

For simple web sites WordPress is the almost "no code" solution. Inelegant and definitely not sexy, but gets the job done, zero to web site in a few days.