No. 2 of 27 ·SEO Log File Analysis Tools

Spider-Lens

Web · Windows · Mac · Linux · Self-hosted

Freedom report

Three barsScore 6.6

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

Spider-Lens is ranked #2 of 27 in SEO log file analysis tools on Freedom251. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Spider-Lens plans and pricing

All plans

Open-source self-hosted Free No paid plans or usage limits stated github.com · 8 Oct 2026

Compared on SEO log file analysis tools

Free plan: Yes
Crawler segmentation: Yes

Best Spider-Lens alternatives

See all 20

Two bars SEO Log Auditor Free tier No. 1Free6.6 Two bars Screaming Frog SEO Log File Analyser Free tier No. 3$11.58/mo6.5 One bar CrawlGenius Log Analyzer Free tier No. 4€49/mo6.4 One bar Log File Bot Traffic Cost Analyzer Free tier No. 5Free6.4 One bar LogLens Free tier No. 6$19/mo6.4 One bar SEOMER Free tier No. 7$12/mo6.4

The record

Purpose: Spider-Lens analyzes Apache and Nginx server logs to monitor traffic, HTTP errors, crawler bots, and server performance.
SEO dashboard: The dashboard summarizes requests, human visits, bots, error rates, HTTP status trends, bot distribution, and 12-week trends.
Crawler monitoring: It detects 16 or more bots and visualizes crawl budget and crawler volume.
Performance analysis: It reports Time to First Byte per URL and supports configurable slow thresholds plus CSV and Excel exports.
Site crawler: The sitemap crawler follows internal links and extracts page titles, H1 headings, word counts, canonicals, robots directives, and crawl depth.
Alerts: Configurable SMTP email alerts and webhook notifications cover 404 spikes, server errors, missing Googlebot, and weekly reports.
Integrations: The project documents Discord and Slack webhooks and an MCP server for Claude Code or other MCP-compatible clients.
AI assistant: Nova uses Google Gemini and requires a Gemini API key; without one, the rest of the application works normally while Nova and AI Analysis show a configuration prompt.
AI data handling: The README says Nova does not send raw log data to Google and transmits only a compact JSON summary of about 500 tokens per request.
Security: Spider-Lens uses JWT authentication with a seven-day token and advises changing the default JWT secret and admin password before deployment.
Deployment: It is available as a standalone Node.js application and as a native WordPress plugin; the plugin does not require Node.js on the server.
Requirements: The Node.js application requires Node.js 18 or later, npm 9 or later, and access to Apache or Nginx log files.
Languages: The interface supports 16 listed languages and can detect the browser language automatically.
Maker: The repository identifies the maker as GDM-Pixel and lists Caen, France.
Price from: Free

Where it ranks on Freedom251

Best SEO Log File Analysis Tools in 2026#2 of 27

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Sources

github.com/GDM-Pixel/spider-lens· checked 8 Oct 2026