CORPUSCorpus Plan vs SEOptimer
Their audit is a lead-capture widget for agencies. Ours is the product.
SEOptimer's embeddable audit is sold to agencies as a lead-generation plan built on email and contact capture, and its multi-model GEO prompt-visibility checks are a separate paid product. Corpus Plan's free audit is complete with no wall, and the GEO capability lives inside the same $99/mo portal — not a second product.
Every SEOptimer claim on this page carries a numbered source — the full list, with access dates, is at the end. Where a fact is not published, the table says so; we don't guess.
Side by side
Feature by feature, with sources.
Nothing on our free report exists to capture your email — there is no wall to put one behind. And when you do pay, it is one flat price for the whole portal: plan, monitoring, GEO files, traffic, research, drafts.
| What | Corpus Plan | SEOptimer |
|---|---|---|
| Free audit — the gate | The unsaved report is a hook. The full report needs a free email-and-password account, no card. The report link lasts 30 days (permanent, with export and re-scans, once saved to that free account). 3 free audits per connection per day. | The embeddable audit widget is sold to agencies as a “Lead Generation” plan — the audit as a way to capture email addresses and contact details, with 2,000+ agencies claimed. [2] [3] |
| What the free tier includes | The unsaved report is a hook. The full report — five pillar scores (SEO, speed, trust, content, AI citability), every finding with the reason written out, and the prioritized plan — needs a free email-and-password account, no card. | — not published on the pages we checked. [1] [2] [3] |
| AI / GEO checking | AI citability is a scored pillar of every audit: llms.txt, JSON-LD structured data, AI-crawler rules in robots.txt, content extractability, question-shaped content, answer structure. The portal adds an AI-visibility check — one model, at one moment, labeled as such, never a promise of mentions. | A GEO section in every report, plus a separate paid GEO product that checks prompt visibility across ChatGPT, Claude, Gemini and Perplexity. [1] |
| Artifact generation | The portal generates the files, not just the findings: llms.txt (framed honestly — a proposed standard read today mostly by SEO and GEO audit tools, not AI crawlers, and cheap to publish), JSON-LD, robots rules for AI crawlers, FAQ suggestions, and grounded content drafts. | — not published on the pages we checked. [1] [2] [3] |
| Worked plan | A prioritized worked plan built from your findings comes with the free report; the portal adds the 30/60/90-day version. | — not published on the pages we checked. [1] [2] [3] |
| Monitoring | Weekly re-scans of every tracked site, with an alert when a score drops. | — not published on the pages we checked. [1] [2] [3] |
| Traffic data | Search Console traffic inside the portal, next to the findings it relates to, plus capped keyword and competitor research. | — not published on the pages we checked. [1] [2] [3] |
| Pricing model | $99/mo flat for the portal, up to 10 sites, cancel anytime. No credits, no metering. | Lead Generation (the embeddable widget) at $59/mo, or $44.25/mo billed annually; the GEO prompt-visibility product is a separate paid product. [1] [3] |
| Methodology transparency | Published at /methodology: every finding code, threshold band and deduction, with its basis cited — rendered from the same constants the engine runs. Deterministic checks held to a suite of 470+ automated tests. | — not published on the pages we checked. [1] [2] [3] |
"Not published" means the sources below do not establish that fact — we say so rather than guess. And a comparison table changes nothing about the one thing no tool can do: neither column is a promise of rankings or AI mentions.
Fair is fair
Where SEOptimer is strong
The GEO prompt-visibility product covers more models than our check does: ChatGPT, Claude, Gemini and Perplexity, where Corpus Plan deliberately runs one model and labels it as such. If multi-model prompt tracking is the thing you need, theirs is broader. [1]
If you are an agency that wants an audit widget on your own site to capture leads, that is exactly the product they sell — 2,000+ agencies claimed — and Corpus Plan does not offer an embeddable widget at all. [2]
Sources
Every SEOptimer claim, sourced and dated.
The numbered references in the table and above resolve here. Anything about SEOptimer that these pages do not establish is marked "not published" on this page rather than guessed.
- https://seoptimer.com/geo-audit — accessed 2026-09-02. SEOptimer's GEO audit page: the GEO section in every report and the separate paid GEO prompt-visibility product covering ChatGPT, Claude, Gemini and Perplexity.
- https://seoptimer.com/embeddable-audit-tool — accessed 2026-09-02. The embeddable audit widget pitched to agencies for lead generation — capturing email addresses and contact details — with 2,000+ agencies claimed.
- https://seoptimer.com/pricing — accessed 2026-09-02. SEOptimer's pricing page: the Lead Generation plan at $59/mo, or $44.25/mo billed annually.
SEOptimer is a trademark of its owner. Corpus Plan is not affiliated with, endorsed by, or sponsored by SEOptimer; the name appears here only to identify the product being compared, and no logos are used. Facts were verified on the dates shown above — if something here is outdated, contact Corpus Plan and we will re-check and correct it.
See for yourself
The unsaved report is a hook.
The full report needs a free email-and-password account, no card. Every check we run is published at /methodology.
Get started See the portal — live demo
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