Yoast guides the WordPress post you are editing; SEO by Daniel audits the whole domain from outside, whatever CMS it runs.
August 7, 2026 · 4 min read
The short version
Yoast is an installed WordPress plugin for on-page and schema, while SEO by Daniel audits any website you didn't install anything on.
Competitor: Yoast SEO · Pricing checked August 2026 from their site
Yoast SEO is the default WordPress SEO plugin, used by 13 million sites for on-page guidance, schema and sitemaps. It optimizes the site it is installed on. SEO by Daniel audits any website you did not install anything on, from the outside. Yoast improves a WordPress site from the inside. SEO by Daniel inspects any site and scores it. The two overlap less than people expect.
A freelance WordPress developer maintains 12 client sites, all running Yoast. Every post shows a green score. One client emails to say organic traffic has dropped.
Yoast still shows green on the pages the developer checks. He runs the client's domain through SEO by Daniel and gets a 58. The audit finds six redirect chains left over from an old permalink structure, 40 images without alt text, and a separate plugin injecting a noindex on the tag archive that Yoast does not manage.
That is the gap. Yoast grades the post you are editing, on the site it runs on. It does not crawl the whole domain, it does not see other plugins, and it cannot audit a client's site you do not administer. A green Yoast score means the post is well-formed. It does not mean the site is technically healthy.
He fixes the redirect chains, adds the missing alt text, and rewrites the rule so the tag archive is indexable. The score moves from 58 to 83. He then runs the same audit on the other 11 client sites and finds two more with similar plugin conflicts. For a freelancer maintaining a portfolio of WordPress sites, that batch check is the useful part, and no single-site plugin can do it.
| | Yoast SEO | SEO by Daniel | |---|---|---| | Job | Installed WP on-page plugin | External technical audit | | Where it runs | Inside WordPress | Browser, any domain | | Scope | The one site it is installed on | Any site, any CMS | | Instant no-account score | No | Yes | | Entry price | Free core; Premium $118.80/yr | From €19/mo | | Finds cross-plugin noindex | Not reliably | Yes, from outside |
Pick Yoast when you manage a WordPress site and want in-editor on-page and schema controls from inside the CMS. It is a free, mature enhancement for the site itself, and it does that job well. If you write and edit in WordPress all day, Yoast belongs there.
Pick SEO by Daniel when you need to audit a website you did not install anything on, produce a scored client-ready report, or monitor sites across different CMS platforms. It answers "how is this site built" without touching its code. If Yoast is green and traffic still drops, the answer is probably outside the post editor, and an external crawl is the fastest way to find it.
Does Yoast replace a full site audit? No. It guides the page you are editing. It will not crawl the whole domain or flag problems caused by other plugins.
Do green Yoast scores mean a healthy site? No. They describe the content of a page, not its speed, crawlability or indexation across the site.
Can I audit a WordPress site without installing anything? Yes. SEO by Daniel works from the outside, so it needs no plugin or admin access.
If the editor is green and traffic is down, look at the whole domain: run a free scan.
Run a free scan and see what a scored report looks like in seconds. Drop in a domain and get a 0-100 scored report in about two seconds.
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