Crawlr vs SEO4Ajax

Crawlr is a website crawler and technical SEO audit tool that finds technical issues, crawl inefficiencies and site architecture problems. It discovers URLs through internal links, sitemaps, canonical links and JavaScript. Crawl settings include robots.txt compliance, rate limiting, inclusion and exclusion rules, and depth controls. Its analysis covers response codes, indexability, metadata, headings, word counts, and internal and external links. Results can be explored through interactive graphs, directory trees, 3D site views and content-cluster visualizations. Crawls can run daily, weekly or on custom schedules, with email notifications on completion. The API can start crawls, check their status, return structured JSON, access historical data and send webhook events. The Free plan is free and includes 500 tokens monthly, one concurrent crawl, CSV and JSON exports, and 15-day history. Paid plans start at $8/mo (annual). The Starter plan lists 5,000 tokens monthly, five concurrent crawls and a 5,000-page maximum per crawl. Unauthenticated sandbox crawls are limited to 25 pages.

SEO4Ajax uses dynamic rendering to make AJAX content visible to search engines and social networks. It can be configured on Apache, nginx, PHP, Java EE, Ruby, Python and Node.js servers, and supports frameworks including React, Vue.js, Angular, AngularJS, GWT, Ember and Backbone. The service says it can handle thousands or millions of pages without website code changes. Its REST API supports customization and automation, while a dashboard tracks bot activity, cache freshness, duplicates and broken links. SEO4Ajax caches snapshots, can capture inner links, and supports custom recache periods and email alerts for quota overages, scraping errors or unreachable websites. SEO reports flag indexing issues such as broken links, duplicates and invalid hreflang tags. The Developer plan is free, with 1,000 pages and 2,500 snapshots per month. Paid plans start at $29/mo (annual), and include email support at listed response times. The service is for business use, not personal, family or household use.