Choosing the product format
Product format is chosen by where people come from and how long a path they will tolerate, not by fashion or stack. The same business gets a different answer depending on whether it already has an audience inside a messenger and whether it needs search traffic.
This section compares formats by the deciding factors: the barrier before the first action, availability to search engines, offline behaviour, release speed and the entry budget. Plus the honest losses of each option, because choosing a format is a trade rather than an improvement across the board.
FAQ
Can we start with a mini app and add a website later
Yes, and it is a common path when the audience is already in a messenger. Just plan for search traffic to start only after the website ships, and treat that as a separate project rather than a migration.
Which format is cheapest to start with
Usually a website, then a mini app, then a mobile app. What matters more than build cost is the cost of acquiring the first users in each channel.