Lovable is built to turn an idea into a working app, with logins, a database and payments, from a conversation. SOSEI takes a different input: the domain you already own, crawled and rebuilt, with your copy and brand carried across.
Run a free audit of your current siteLovable is one of the fastest ways from an idea to a working full-stack product: a real front end with logins, a database, file storage and payments, a live preview while you talk to it, and code you can take with you. For anything that behaves like an app, it does far more than a website builder.
Lovable builds what you describe, so the result is only as complete as the description. SOSEI starts from what you already published, and puts the website rules (consent, legal pages, contrast, AI-crawler files) into every build instead of leaving them to the prompt.
Structural differences only — no prices and no scores, because both change faster than this page does. Two rows go to Lovable.
| Capability | SOSEI | Lovable |
|---|---|---|
| Starts from the website you already haveYou give a domain, not a blank canvas or a prompt. | Yes | Possible, but you configure it |
| Existing copy, images and brand carried overYour pages are crawled and rebuilt, not retyped into a template. | Yes | Possible, but you configure it |
| One-click rebuild of the whole site against current standardsYou trigger it — the pipeline regenerates against today's standards, not the ones in place when the site was first built. | Yes | No |
| Report of what AI assistants actually answer about youBuyer questions run against several assistants and scored. | Yes | No |
| llms.txt and an AI-crawler allowlist shipped with the site | Yes | Possible, but you configure it |
| Cookie consent banner in every published siteBuilt in on every page we serve — tracking scripts stay gated behind it. | Yes | Possible, but you configure it |
| Privacy, terms, cookie and accessibility pages generated | Yes | Possible, but you configure it |
| WCAG 2.1 AA contrast enforced by the rendererColor choices that fail the ratio are corrected before publish. | Yes | Possible, but you configure it |
| Fonts self-hosted, no third-party font CDN | Yes | Possible, but you configure it |
| Drag-and-drop visual editorSOSEI edits by chat and direct in-page tweaks instead. | No | Possible, but you configure it |
| Template gallery to browse and pick fromEach SOSEI site is generated for one brand, so there is nothing to browse. | No | Yes |
| Builds web apps too — logins, a database, custom logicSOSEI builds and hosts business websites: pages, a blog and a contact form, not apps. | No | Yes |
A dash means the capability is available but set up per site by the owner, rather than being part of every published page.
Before choosing between SOSEI and Lovable, it helps to know what is actually wrong with the site you have. The 40-point audit scores it across SEO, AI discoverability, accessibility, privacy, mobile, performance and design.
Run the free audit