ChatGPT can take a conversation all the way to a published page or small web app. SOSEI starts from somewhere else: the domain you already own, crawled page by page and rebuilt, with the copy and brand carried across.
Run a free audit of your current siteChatGPT is where many people already do their thinking, and it can go from that conversation (research, copy, files, data) to a working page or small web app with its own data, without leaving the chat. For a quick tool, a prototype or a one-off page, nothing is closer to hand.
ChatGPT builds what the conversation describes, one request at a time. SOSEI is a pipeline for one job, rebuilding a whole existing website, with the crawl, the website rules and the hosting part of every build rather than things to remember to ask for.
Structural differences only — no prices and no scores, because both change faster than this page does. One row goes to ChatGPT.
| Capability | SOSEI | ChatGPT |
|---|---|---|
| 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 | Possible, but you configure it |
| 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 | No |
| Template gallery to browse and pick fromEach SOSEI site is generated for one brand, so there is nothing to browse. | No | Possible, but you configure it |
| 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 ChatGPT, 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