7 checks for comparing SEO tools, providers and sources

What to take away

1. Check the task, not the ranking

Write down two or three jobs you run weekly. A rank tracking task fits AccuRanker or Wincher. A backlink task fits Ahrefs or Majestic. A technical crawl fits Screaming Frog or Sitebulb. An all-in-one task fits Semrush or SE Ranking.

A provider earns a place only when its help centre documents that job. Where a capability appears only on a sales page, ask for the help-centre article by name and read its limits section. A solo buyer needs a smaller feature set than an agency team, so check the page for the plan you would actually buy, not the flagship feature list.

2. Check the invoicing entity and licence geography

Ask for the invoicing entity name in writing, as that detail decides which law applies if the contract goes wrong. Check the entity on the register it is registered on — Companies House for a UK company, or its national equivalent — and read the governing-law clause: that clause, not your own location, decides which law applies in a dispute.

Screaming Frog and Sitebulb are UK-based, simplifying invoicing and support hours, while Semrush, Ahrefs and Moz invoice from overseas entities. For a team buying in England, confirm where data is stored and whether support runs in your working hours, then record the answers in your SEO tools comparison sheet.

3. Check primary documentation against aggregate scores

Read the limits section first. Seat counts and API quotas shape day-to-day cost. Review platforms such as G2, Capterra and TrustRadius aggregate someone else's priorities into a single score, so treat a score as a prompt to check, not as evidence. Primary documentation tells you what a setting does and what it leaves out. Name each source in your notes.

4. Check free sources before paid seats

Google Search Console is free, showing search performance, indexing and Core Web Vitals, while Bing Webmaster Tools is free and reports its index and backlink data. Ahrefs Webmaster Tools is free for verified site owners. Moz presents MozBar as a free SEO toolbar for on-page analysis.

Treat one page as a sample, not an audit; a toolbar cannot show crawl data, log files or index status over time.

5. Check the billing model and hard limits

Screaming Frog SEO Spider is free up to 500 URLs per crawl; a paid licence removes it. Sitebulb is subscription-based and suits consultant-led audits.

Semrush and Ahrefs sell recurring subscriptions with tiered limits; Ahrefs has no permanent free plan for its main suite, though Ahrefs Webmaster Tools is free. Moz Pro is subscription-based; AccuRanker charges for rank tracking speed and volume; SE Ranking and Serpstat sell all-in-one plans. For each shortlisted provider, open its pricing page, note the cheapest tier that covers the job from check 1, the seat count, the API quota and the overage rate, and write down the date you read it, because these figures change.

6. Check data coverage and method

Ahrefs is known for backlink data, Site Explorer. Majestic reports Trust Flow and Citation Flow for link analysis; Sistrix publishes Visibility Index for organic search visibility; Similarweb estimates traffic and market share, not crawl data or log files.

Lumar and Botify target enterprise technical SEO for large sites, ContentKing monitors SEO changes in real time, Ryte checks website quality, and Wincher offers simple rank tracking. Match the method to the question you need answered.

7. Check renewal, support and the evidence register

Prices, seat rules and features change between contracts, so diarise a review 60 days before renewal. Read the notice period, cancellation and termination clauses at the same time, because they set the deadline for changing anything. Log every claim with its source and the date you read it. Record the page address and keep a screenshot, because help pages are edited without notice.

For data protection questions, the Information Commissioner's Office (ICO) publishes guidance on storing and transferring personal data. If content standards matter to you, the Government Digital Service's content design guidance on GOV.UK is a published benchmark.

Common questions

Do I need to pay for more than one provider?

Not usually. Most teams can run a comparison on one paid seat plus free sources. Add a second licence when a documented gap appears. A second seat earns its cost when two people need the same data on the same day.

How many providers belong on a shortlist?

Three or four is workable. Beyond that, the documentation review becomes the bottleneck. Each addition multiplies the reading.

Can a free trial tell me enough about a provider?

A trial shows the interface, not the support or the contract. Use it alongside the documentation, never instead of it. Screaming Frog has a free crawl limit. Semrush and Sitebulb offer trial access.

What counts as strong evidence?

A dated page on the vendor's help centre, a contract clause, or a publication from a regulator or government department. Marketing pages and star ratings do not qualify. A vendor's own pricing page counts for price, but not for capability.