The best free SEO alternative to Alexa is SimilarWeb. If that doesn't suit you, our users have ranked more than 25 alternatives to Alexa and three of them are free SEO Tools so hopefully you can find a suitable replacement. Other interesting free SEO Tool alternatives to Alexa are Likestat and Traffic.cv.
SimilarWeb is a global software development and data aggregation company specializing in web analytics and digital performance. It provides traffic insights for websites, supporting market research, competitive analysis, and business development.
Valuate and find statistics of any website or domain including website traffic, alexa rank, meta tags, DNS records and many free seo tools for webmasters.
Traffic.cv is a free, no-signup-required traffic analysis and trend monitoring tool designed for website owners, SEO specialists, and digital marketers. Instantly access precise traffic metrics, keyword insights, new website leaderboards, and fastest-growing sites lists for...
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It's also a great search engine for statistics like Alexa.