A site audit is only as good as the issues it catches and the fixes it prioritizes. Verdict first, rubric second.
Quick answer
Semrush Site Audit scores 90/100 for the team that wants one tool to crawl, score site health, and hand back a prioritized fix list. It runs roughly 130 technical checks and sits inside the broader Semrush suite, on plans from about $117/month (annual). Ahrefs Site Audit is the runner-up with similar depth and a cleaner crawl visualizer. If you only need technical auditing and want maximum depth per dollar, Screaming Frog and Sitebulb beat the suites on price.
The ranking
| Rank | Tool | Best for | Entry price | SR Score |
|---|---|---|---|---|
| 1 | Semrush Site Audit | All-in-one audit + suite | From ~$117/mo (Pro, annual) | 90 |
| 2 | Ahrefs Site Audit | Audit + backlink/keyword suite | From ~$108/mo (Lite, annual) | 88 |
| 3 | Screaming Frog SEO Spider | Deepest crawl per dollar | Free to 500 URLs; ~$259/yr | 87 |
| 4 | Sitebulb | Guided audits with prioritized hints | ~$13.50/mo (Lite, annual) | 85 |
| 5 | Lumar (DeepCrawl) | Enterprise automated auditing | Quote only | 80 |
| 6 | Ryte | Content + technical quality | Custom (quote) | 77 |
Methodology
Weights: Issue detection & accuracy 30, Capability vs. claims 25, Value for money 20, Support & docs 15, Transparency 10.
Detection leads because an audit tool’s whole value is catching real, actionable issues and not drowning you in false positives. Capability covers prioritization, scheduling, and scale. Value is at the plan a buyer needs. Quote-only enterprise tools lose transparency points.
Semrush Site Audit — 90
Part of the Semrush suite. It crawls your site, scores health, runs 130 checks (crawlability, HTTPS, Core Web Vitals, internal linking, structured data, hreflang), and groups issues into Errors / Warnings / Notices with fix guidance and thematic reports. The Pro plan (from **$117/mo annual**, $139.95 monthly) audits up to 100,000 pages/month; Business (~$416/mo annual) raises that to 1,000,000 pages/month and adds API access.
Trade-off: you are buying the suite. If you only need auditing, you are paying for keywords and backlinks you may not use.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 27 |
| Capability vs. claims (25) | 23 |
| Value for money (20) | 16 |
| Support & docs (15) | 14 |
| Transparency (10) | 10 |
Ahrefs Site Audit — 88
Ahrefs’ audit module is fast and visual, with a strong crawl tree, issue prioritization, and tight links to its backlink and keyword data. Every Ahrefs plan includes Site Audit; Lite is about $108/mo (annual) / $129 monthly, Standard ~$208/mo annual, Advanced ~$374/mo annual.
Trade-off: like Semrush, you buy the whole platform. Lite’s project and crawl limits are tighter than power users want.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 27 |
| Capability vs. claims (25) | 22 |
| Value for money (20) | 16 |
| Support & docs (15) | 13 |
| Transparency (10) | 10 |
Screaming Frog SEO Spider — 87
Not an all-in-one, but the deepest technical crawl per dollar. Free to 500 URLs; about $259/year unlimited, with JS rendering, custom extraction, and GSC/GA4/PSI integrations. Pairs perfectly as the technical backbone alongside a suite.
Trade-off: desktop-bound, no automated health score or hosted dashboards — you interpret the data.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 28 |
| Capability vs. claims (25) | 22 |
| Value for money (20) | 20 |
| Support & docs (15) | 11 |
| Transparency (10) | 6 |
Sitebulb — 85
The most explanatory auditor: prioritized “hints” with severity and education make it ideal for client-facing reports. Desktop Lite ~$13.50/mo (annual), Pro ~$42/mo, Cloud ~$245/mo.
Trade-off: guidance adds overhead, and no permanent free plan.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 26 |
| Capability vs. claims (25) | 22 |
| Value for money (20) | 17 |
| Support & docs (15) | 14 |
| Transparency (10) | 6 |
Lumar (DeepCrawl) — 80
Enterprise auditing with automated monitoring, governance, and accessibility checks at scale. Pricing is quote-only; estimates run into the low thousands per month.
Trade-off: opaque pricing and enterprise-only fit; overkill for small and mid sites.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 26 |
| Capability vs. claims (25) | 22 |
| Value for money (20) | 11 |
| Support & docs (15) | 13 |
| Transparency (10) | 5 |
Ryte — 77
A website-quality platform blending technical SEO, content quality, and monitoring. Pricing is custom/quote-based for its current tiers.
Trade-off: strong on content + technical overlap, but quote-only pricing and a smaller footprint than the leaders cost it on value and transparency.
| Criterion | Score |
|---|---|
| Issue detection & accuracy (30) | 24 |
| Capability vs. claims (25) | 21 |
| Value for money (20) | 12 |
| Support & docs (15) | 12 |
| Transparency (10) | 6 |
How to choose
The first fork is suite versus dedicated crawler. If you also need keyword research, backlink data, and rank tracking, a suite (Semrush or Ahrefs) bundles auditing with everything else and is better total value — you are not paying twice for overlapping tools. If you only need technical auditing, a dedicated crawler (Screaming Frog or Sitebulb) is cheaper and usually deeper on pure technical detail, and Screaming Frog’s flat ~$259/year often undercuts a year of suite subscription.
The second fork is data versus narrative. Screaming Frog hands you raw, complete crawl data and expects you to interpret it — ideal for experienced SEOs. Sitebulb and the suites prioritize a health score and a prioritized, explained fix list — ideal for reporting to clients or stakeholders who want “what’s wrong and what to fix first,” not a spreadsheet. Match the tool to who reads the output.
Re-weighting the rank
Semrush leads because we weight detection accuracy and integrated capability highly and it scores well on both with public pricing. Weight value to 40 and zero out the suite extras you don’t use, and Screaming Frog overtakes it on cost-per-depth. Weight enterprise governance and automated monitoring up, and Lumar climbs. The #1 here is the best pick for a team that wants one well-supported, transparently priced tool to audit and prioritize — re-weight for your situation and a different tool can legitimately win.
Verification
- Semrush Site Audit — plan prices and page-audit limits verified on semrush.com/pricing/seo (Pro ~$117/mo annual / $139.95 monthly, 100k pages; Business ~$416/mo annual, 1M pages).
- Ahrefs Site Audit — tier prices verified via Ahrefs pricing listings (Lite ~$108/mo annual / $129 monthly; Standard; Advanced); Site Audit included on all plans.
- Screaming Frog — pricing on screamingfrog.co.uk/seo-spider/pricing (free to 500 URLs; ~£259/yr).
- Sitebulb — tiers on sitebulb.com pricing (Lite ~$13.50/mo annual, Pro ~$42/mo, Cloud ~$245/mo).
- Lumar — quote-only confirmed on Lumar’s site (request-a-quote).
- Ryte — custom/quote pricing confirmed via Ryte product/pricing pages.
Related rankings
- Best Content Gap Analysis Tools 2026: 7 Scored
- Best All-in-One SEO Platforms 2026: 6 Suites Scored
- Best Backlink Monitoring Tools 2026: 6 Scored
- Best Competitor Analysis SEO Tools 2026: 6 Scored
Frequently asked questions
- What is the best site audit tool in 2026?
- By our rubric, Semrush Site Audit (90/100). It runs ~130 technical and on-page checks, scores site health, prioritizes fixes by impact, and re-crawls on schedule. It is part of the Semrush suite, on plans from about $117/month (annual).
- What is the cheapest serious audit tool?
- Screaming Frog at roughly $259/year flat gives the deepest crawl per dollar; it is free up to 500 URLs. Sitebulb's desktop Lite (~$13.50/mo annual) is a strong low-cost alternative with guided audit hints.
- Suite tool or dedicated crawler?
- If you also need keywords, backlinks, and rank tracking, a suite (Semrush/Ahrefs) is better value overall. If you only need technical audits, a dedicated crawler (Screaming Frog/Sitebulb) is cheaper and often deeper.
- Can I recompute this ranking?
- Yes — weights and per-criterion scores are published below. Weight value at 40 and the dedicated crawlers move up; weight integrated workflow and the suites stay on top.