Side-by-side rankings of AI builders, scored against a public methodology.
93 posts
Six of eight AI app builders document a way to hand over an app, and they move six different things. Only Lovable and v0 have written down what happens when the person who built it is already gone. Compared September 2026.
Ask eight AI app builders whether they train on your code and you get five structurally different answers, only one of which is a plain no. The switch is never in your project, it is gated at a different plan on every platform, and on every vendor that documents it, opting out is forward-only.
A PDF is a rendering job, not a data format, and your backend runtime decides which of the four possible renderers you can reach. Bubble is the only one of eight with a documented path, Webflow the only one that names the constraint, and Replit the only one that can host the renderer itself.
Your spreadsheet can become the app's live backend, be imported once and archived, or be read as nothing more than a specification. The eight builders split three ways, and the documentation says which is which.
A beta label is not a quality warning, it is a vendor excusing itself from its own deprecation promises. We measured what Lovable, Bolt.new, Replit, Base44, Bubble, Softr, v0 and Webflow publish about feature maturity in 2026. Four label it, four do not, and the absence of a label is evidence of nothing.
Comparison lore asks what happens when you leave a builder. It rarely asks what happens when the builder moves on without you. Across eight AI app builders, a platform change lands on a shipped app as disabled, frozen or grandfathered, and the quietest outcome is the one that hurts most.
If a developer is taking your app over, the question is not whether the builder exports code but who owns the source of truth afterwards. We read the documentation for eight AI app builders in September 2026 and found the received ranking inverts.
All eight AI app builders let your app use somebody else's code, and they mean five different things by it: a package registry, a real machine, a plugin marketplace, a design-system registry, or a snippet box. The mechanism decides who patches it.
Every AI app builder is an AI product. That says nothing about whether the app you ship can call a model. Eight builders compared on managed inference, bring-your-own-key routes, and the column that decides the bill: whose meter the call lands on.
The auth column says yes on seven of eight, so it decides nothing. A client portal turns on whether the product has a first-class idea of a person who uses your app without being on your team. Three of eight name it, one retired the billing model built on it, and one removed app logins entirely.
Three of the eight builders we track document a real mechanism for live data in the app you ship. A scored comparison of Lovable, Bolt.new, Replit, Base44, Bubble, Softr, v0 and Webflow, with the four different things their docs mean by the phrase real time.
Seven of eight AI app builders let you edit the generated code, but only Bolt.new lets you lock files against the AI, and v0 documents that your manual edits create no restore point at all. Eight builders compared on the four questions that decide whether hand-editing is safe.
