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A neutral, documentation-based benchmark axis for whether AI app builders commit to accessible output, scored across v0, Lovable, Replit, Base44, and Bolt.new (August 2026).
As of July 2026, AI app builders increasingly claim to "test" the apps they generate, but that is not the same as handing you a re-runnable test suite you own. This proposed benchmark axis scores each builder on five documented sub-criteria and finds that agent-side verification is common while a persisted, developer-owned test suite is largely undocumented across the cohort.
A neutral BuilderProof proposal to score AI app builders on how autonomously each recovers from errors in its own generated code, separating build-error detection from runtime-error capture.
A neutral BuilderProof proposal to score AI app builders on Stack Currency across five documented sub-criteria. The finding: only v0 publicly version-stamps its generated stack in a dated changelog; three of five builders leave their framework foundation undocumented.
A neutral BuilderProof proposal to score AI app builders on Rollback Safety across five documented sub-criteria. The finding: code version history is now table stakes, but data-layer rollback is the sub-criterion almost none of them document.
Code and data lock-in get benchmark axes; how a builder handles your API keys does not. A proposed BuilderProof axis with a reproducible five-check rubric and a preliminary July 2026 docs read across five AI app builders.
Benchmarks measure whether you can leave an AI app builder with your code. Almost none measure whether you can leave with your data. A proposed sixth-family BuilderProof axis with a five-check rubric and preliminary, docs-based reads of five builders.
BuilderProof's six-axis composite ranking was withdrawn on August 21, 2026 after one of its six inputs was withdrawn at source. This hub now documents the axis set and the per-axis documentation-derived assessments for v0, Replit, Lovable, Bolt.new and Base44, and ranks no builder overall.
Every builder now makes presentable output; the code underneath diverges. A documentation-derived read of five AI app builders on the BuilderProof output-quality axis. The numeric 0-100 ranking was withdrawn on August 21, 2026 because it reused figures from a June 2026 round the lab cannot substantiate.
Deploying is solved; deploy quality is not. Five AI app builders are placed on the SEO, accessibility and performance posture of the app they actually ship, read off public vendor documentation. v0 is assessed highest at 9/10.
BuilderProof has withdrawn the six-axis totals for this pairing, and two of the five surviving axes tie. A reproducible, documentation-sourced scorecard of the closed no-code generator versus the open cloud IDE.
A reproducible, documentation-sourced comparison of the top Lovable alternatives, v0, Replit and Bolt, read against BuilderProof's axis set with Lovable as the reference line. The six-axis totals and the output-quality cells are withdrawn; the five surviving rows stand.
