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Four Bolt.new alternatives, Lovable, v0, Replit and Base44, scored on BuilderProof's neutral six-axis 2026 rubric. See which one replaces Bolt for your build, and when to stay on Bolt.
The 2026 prompting guides of Lovable, Bolt and v0 all say prompt wording changes the output. So a single prompt cannot benchmark a builder. Why prompt sensitivity is a validity threat, and what a fixed, versioned prompt suite looks like.
AI app builders swap default models and scaffolding almost weekly. Read from five 2026 vendor changelogs: why an undated benchmark score decays, and the versioning protocol BuilderProof uses to keep scores reproducible.
Four Replit alternatives, v0, Bolt, Lovable and Base44, scored on code portability, deploy quality and auth posture with BuilderProof's neutral 2026 rubric. v0 and Bolt only tie Replit at 23/30; none beat it.
We scored v0, Replit, Lovable, Bolt.new and Base44 across six documented axes and summed them into one composite ranking. See the 2026 leaderboard, who wins each axis, and how to reproduce every score.
Every builder now makes pretty output; the code underneath diverges. We score five AI app builders on visual fidelity, code structure, and functional correctness against one fixed brief. Lovable leads at 93/100.
Replit, v0, Bolt and Lovable scored as Base44 alternatives on code portability, deploy quality and auth posture, using BuilderProof's published rubric. Neutral, sourced, and dated July 9, 2026.
Deploying is solved; deploy quality is not. We score five AI app builders on the SEO, accessibility, and performance of the app they actually ship. v0 leads at 9/10.
A documentation-sourced, single-axis leaderboard scoring how easily you can export and own the code from five AI app builders. v0 and Bolt lead at 8, Lovable and Replit at 7, Base44 at 4.
A reproducible, documentation-sourced leaderboard of the top Lovable alternatives: v0 (47/60), Replit (45/60), and Bolt (44/60) scored on BuilderProof's six axes, with Lovable (44/60) as the reference line.
A reproducible, documentation-sourced scorecard: v0 by Vercel scores 47/60 and Lovable 44/60 across BuilderProof's six axes. See where each one actually wins in 2026.
Bolt and v0 scored across BuilderProof's six axes in July 2026. v0 finishes 47/60, Bolt 45/60, and they split the axis wins. Here is the per-axis scorecard, with every score cited.
