Bubble

Bubble is the entry here that is genuinely a development platform. The interface is drawn on a blank canvas rather than assembled from a theme's sections, the data lives in a structured database you design, and privacy rules decide which records reach which user. Around that sits the machinery of running something real: a development version separate from the live one, an API surface, and official plugins for payments.

That reach is why it scores 5 for room to grow. Search settings cover titles, descriptions, canonical addresses, a generated sitemap and a table of redirects. Interface text can be held in several languages. Data comes back out in three formats. Capacity is bought as workload rather than capped, so an application that gets popular gets more expensive rather than hitting a wall.

The tradeoff is the learning, and Bubble takes a 2 for how far a beginner gets alone because of it. An agent will write a first version from a description, and you still have to understand workload metering, privacy rules and the difference between the version you are editing and the one people are using. The $29 plan is a floor rather than a total: storage beyond the allowance is billed, and some plugins carry subscriptions of their own.