HONEST ALTERNATIVE · SEO + AI VISIBILITY
Siteliner is a free site-wide crawler focused on duplicate content detection and broken internal link identification — crawling up to 250 pages per month and reporting which pages have the most content overlap with other site pages. DeepSEOAnalysis audits individual pages for technical SEO depth: property-level structured data validation, real CrUX p75 from Chrome users, and five-signal AI visibility scoring. Site-wide content duplication scanning vs per-URL technical quality audit — complementary tools for different diagnostic questions.
At a glance
The useful answer is not “which tool is best?” It is which tool fits the job you need done this week.
| Criterion | Competitor | DeepSEOAnalysis |
|---|---|---|
| Core function | Siteliner is a site-wide crawler focused on two core checks: duplicate content detection (identifying pages with substantial content overlap, expressed as a percentage of shared content) and broken link identification (internal links pointing to 4xx/5xx URLs). The tool crawls a site up to a configurable page limit and produces a site-wide duplicate content report showing which pages share the most content with other pages on the site, and a broken link report showing which pages contain links to non-functioning URLs. Siteliner is owned by Copyscape's parent company (Indigo Stream Technologies) and shares similar content fingerprinting technology. | A per-URL technical SEO and AI visibility auditor. Submit any URL for an on-demand audit: property-level JSON-LD structured data validation, real CrUX field data (p75 LCP, CLS, INP from Chrome users), canonical tag correctness, robots.txt and AI crawler access, llms.txt presence, broken outbound links, and five-signal AI visibility scoring. Focuses on technical quality depth per URL rather than site-wide crawl breadth. |
| Duplicate content detection | Siteliner's primary feature is duplicate content detection across the crawled site — identifying which pages share substantial content overlap with other pages on the same domain. The report ranks pages by their "match percentage" (how much of a page's content is duplicated elsewhere on the site), and highlights the most-duplicated content blocks with visual highlighting. This is valuable for identifying unintentional duplication: product pages sharing the same boilerplate descriptions, CMS template pages generating near-identical content, e-commerce category pages with overlapping product lists, or pages with identical footer content inflating the duplication percentage. | No site-wide duplicate content scanning. DeepSEOAnalysis focuses on per-URL technical SEO quality rather than cross-page duplication analysis. For duplicate content specifically, the canonical tag check on each audited URL verifies that the correct canonical is declared — confirming that intended duplicates (e.g., paginated pages, parameter URLs) are correctly pointing canonical to the primary version. For site-wide duplication issues, Siteliner or a full crawl tool (Screaming Frog, Sitebulb) is the right tool. |
| Broken link detection | Siteliner crawls all internal links found during site crawl and identifies links to pages returning 4xx or 5xx status codes. The broken link report shows which source pages contain broken links and what the broken destination URLs are. This site-wide broken link audit is useful for identifying link rot across large sites — pages that have been deleted or moved without redirects, leaving internal links pointing to dead URLs. Siteliner does not check external links (links pointing to other domains). | Broken outbound link detection on each audited URL: samples external links found on the page and checks their status codes, flagging links to URLs returning 4xx or 5xx responses. This per-URL external link check complements Siteliner's internal link focus — DeepSEOAnalysis finds broken external links that Siteliner doesn't check, while Siteliner finds broken internal links across the full site. |
| Structured data and schema | Siteliner does not audit structured data. The tool's scope is content duplication and link health — it does not validate JSON-LD, check schema property completeness, or detect server-rendering gaps that affect rich result eligibility. Structured data analysis requires a separate tool. | Property-level JSON-LD validation with server-rendering detection. Checks whether structured data is present in the initial server-rendered HTML (what Googlebot's HTML parser sees first) vs only available after JavaScript execution (which may or may not be processed for rich results). For each schema type found, validates required and recommended properties — flagging missing fields, incorrect property types, and mismatched data between schema and visible page content. |
| Core Web Vitals and performance | Siteliner does not measure Core Web Vitals or page performance. The tool focuses on content analysis (duplication, broken links) and does not include speed or performance metrics. Performance measurement requires a separate tool. | Real CrUX field data at p75 from Chrome users for every audited URL: LCP, CLS, and INP status (Good/Needs Improvement/Poor), LCP element identification, render-blocking resource detection, and image format analysis. CrUX data is the same data Google uses for Page Experience ranking — reflecting actual user experience rather than lab simulation. |
| Crawl scope and limits | Siteliner's free tier crawls up to 250 pages per site per month. The paid plan (Siteliner Premium) removes the page limit and monthly frequency restriction. Crawls are initiated for a domain and return site-wide results across all crawled pages. The focus is breadth (covering the whole site) rather than depth (detailed per-page analysis). | Per-URL on-demand audit with no crawl depth limit for the audited URL's checks. Free tier provides unlimited individual URL audits; paid plans add monitoring (periodic re-auditing of tracked URLs), saved report history, and bulk audit capabilities. The focus is depth (detailed per-page technical analysis) rather than breadth (site-wide crawl). |
| AI visibility and GEO scoring | Siteliner does not include AI visibility scoring, GEO signal assessment, llms.txt support, or AI crawler access checking. The tool predates the AI search era and focuses on traditional duplicate content and link health signals. | Five-signal AI visibility scoring: AI crawler access in robots.txt (GPTBot, ClaudeBot, PerplexityBot), llms.txt presence, FAQPage/HowTo JSON-LD server-rendering, question-heading ratio ≥20%, content chunkability ≤400 words average. Siteliner identifies duplicate content problems that reduce page authority; DeepSEOAnalysis confirms whether the non-duplicate pages are technically optimised for AI search citation. |
| Pricing and access model | Siteliner free tier: up to 250 pages per domain per month. Siteliner Premium: approximately $8/mo for unlimited page crawls. One of the most affordable site crawling tools available; the free tier is often sufficient for small sites. | Anonymous full technical audit: $0, no signup, no email gate — the complete report at no cost. Free account: saved reports and one monitored site. Pro is $24/mo for five monitored sites; Agency is $89/mo for 25 sites and white-label workflows. |
What each product is
Siteliner crawls your site (250 pages free, unlimited on Premium at ~$8/mo) and identifies: pages with high duplicate content match percentages (content fingerprinted against all other crawled pages), and broken internal links (links pointing to 4xx/5xx URLs). Focused, fast, and free for most small-to-medium sites.
DeepSEOAnalysis audits individual pages for technical SEO depth: property-level JSON-LD validation (including server-rendering detection), real CrUX p75 from Chrome users, five-signal AI visibility scoring, canonical verification, and broken external link detection — free with no signup required.
When to choose which
Pricing context
FAQ
Siteliner checks two things: (1) duplicate content — it crawls your site and identifies pages with significant content overlap with other pages on the same domain, showing which pages have the highest percentage of duplicated content; and (2) broken internal links — it identifies links on your pages that point to URLs returning 4xx or 5xx status codes. It is a focused, free tool for identifying content duplication and internal link health issues across a whole site.
Siteliner uses content fingerprinting to identify matching text blocks across the pages it crawls. It compares each page's content against all other crawled pages and calculates a "match percentage" — what proportion of the page's content appears on other pages of the same site. Pages with a high match percentage are flagged as potential duplicate content issues. Note that Siteliner counts common elements like navigation, footer content, and sidebars as duplicated content — high match percentages may partly reflect shared template elements rather than genuinely duplicated unique content.
Yes — they have complementary scope. Siteliner identifies site-wide duplicate content and broken internal links (breadth). DeepSEOAnalysis audits individual pages for technical SEO depth: structured data validation, real CrUX p75 from Chrome users, AI visibility scoring, canonical configuration, and broken external links. A useful workflow: use Siteliner to identify the pages with the highest duplication percentage and the most broken internal links — these are your priority problem pages. Then audit those specific pages in DeepSEOAnalysis to confirm canonical configuration is correct, structured data is properly implemented, and CWV are acceptable.
No. Siteliner covers duplicate content detection and broken internal links — two specific signals within a complete SEO audit. A full technical SEO audit additionally covers: structured data property validation, Core Web Vitals from real user data, canonical correctness, robots.txt and AI crawler configuration, international SEO (hreflang), page speed analysis, mobile usability, and AI visibility scoring. Siteliner's value is its free site-wide scope for the specific issues it covers; DeepSEOAnalysis provides the technical depth per URL that a complete audit requires.
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