Ahrefs vs Semust API

Ahrefs is a web and API platform for SEO research, including keyword research, rank tracking, site audits, backlink analysis and competitor research. It also provides content tools, AI assistants and MCP access. Content Explorer can find web mentions and link prospects, while AI Content Helper supports content improvement. The free plan provides site data and fixes with limited access to Site Explorer and Site Audit. Paid plans start with Starter at $29 a month. Lite costs $129 a month and includes five projects, 750 tracked keywords, 100,000 monthly crawl credits and one user; its Site Audit allowance has a 25,000-page project maximum. Annual payment saves up to 17%. Enterprise costs $1,499 a month and requires an annual commitment; it includes SSO, two-factor authentication, ISO27001 certification, access management, audit logs and unlimited additional users. Ahrefs says its web index contains 170 trillion pages, tracks 41.9 billion keywords and filters 28.7 billion keywords; AhrefsBot crawls 8 billion pages daily. Founded in 2010, the company is headquartered in Singapore. Multilingual support is available five days a week.

Semust API is the API offering within Semust, an AI-powered marketing and SEO platform for keyword research, content management, and digital marketing. Its SERP API returns real-time Google result data, including organic listings, ads, People Also Ask, AI Overview, images, and Knowledge Panel information. The Keyword Research API provides search volume, keyword difficulty, CPC, search intent, and related suggestions through one endpoint. Example requests use HTTP headers for API authentication, and the API uses REST. The wider platform lists rank tracking, technical SEO checks, backlink analysis, AI content generation, internal linking, and reporting. Connections include Google Search Console, Google Ads, Google Analytics, Meta Ads, WordPress, Bing Webmaster, and Yandex Metrica. A free Chrome extension can show page outlines, check link status codes, and inspect JSON-LD. The free plan is a 14-day trial without a credit card; paid plans start at $19 a month and have plan-specific credit, tracking, and project limits.