Developer Tools vs Semrush

devtools.tr is a free toolbox of 173 web and developer tools for webmasters, developers and system administrators. Every check runs live against real servers: DNS lookup, SSL/TLS and security headers, website analyzer with PDF reports, SEO and Core Web Vitals, TTFB, CDN and compression tests, IP geolocation, WHOIS, ASN and blacklist checks. Developer utilities include a JSON formatter and validator, regex tester, Base64, UUID, SQL/HTML/CSS/JS formatters and minifiers. Results come as clear reports with scores and ready-to-paste fixes for Apache, nginx and Cloudflare. No sign-up, no limits, fully in English and Turkish, and works on mobile.

Semrush is an online visibility and marketing intelligence platform founded in 2008 by Oleg Shchegolev and Dmitry Melnikov. Headquartered in Boston, it was listed on the New York Stock Exchange from 2021 until Adobe, which announced the deal in late 2025, completed its acquisition in 2026; Semrush now operates as an Adobe company. Semrush started as an SEO tool and now covers search, paid advertising, content, local, social media and competitive research for marketing teams and agencies.

Core SEO tools include Keyword Magic Tool and Keyword Overview, Domain Overview and Organic Research for competitor analysis, Backlink Analytics and Backlink Audit, Site Audit for technical issues, Position Tracking for daily rankings, On Page SEO Checker and SEO Writing Assistant. Advertising Research reveals competitors' paid search, and Traffic Analytics estimates website traffic. Newer features track brand visibility in Google AI Overviews and AI assistants such as ChatGPT. Plans run from a limited Free tier through SEO, Starter, Pro+ and Advanced, plus paid add-on toolkits and extra user seats.

Semrush fits agencies and marketing teams that run SEO and paid search together and want competitive data in one subscription. It is expensive, add-ons and seats raise the total quickly, and the breadth creates a learning curve. Ahrefs is the main rival and is often preferred for backlink data and a cleaner interface, SE Ranking and Mangools are cheaper for smaller teams, and Similarweb is stronger for market-level traffic intelligence.