Ahrefs vs Keyword Discovery

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.

Keyword Discovery compiles keyword statistics and search phrases used to find products and services, including terms that bring traffic to competitors. Its tools cover historical trends, competitor research, Keyword Effectiveness Indicator analysis, PPC bid values, keyword density, and domain research. The maker says its database contains nearly 38 billion searches from more than 200 search engines worldwide; it says collection happens daily and the online database is updated monthly. Listed regional databases cover Australia, Canada, the Netherlands, France, Germany, Italy, Norway, Poland, Portugal, Spain, Sweden, the UK, and the US. Results can be saved in projects and copied, renamed, translated, or exported. Keywords can be imported from Excel, text files, meta tags, and URLs. An XML API can supply keyword suggestions to a website or support a research tool. The service is aimed at SEO, PPC campaigns, niche marketing, and domain parking. The Standard plan is free. Professional costs $49.95 a month, and Enterprise XML API Access costs $495 a month. Free trial users can see at most 10 results per query; paid subscribers can access up to 1,000 through the website interface. The service is available on the web and through an API.