Keys.so (Кейсо) SEO Tool

Keys.so (Кейсо) is a comprehensive tool designed for SEO specialists, marketing agencies, and business owners. It provides in-depth analysis of competitors across both organic and paid search results, including platforms like Yandex and its advertising network, as well as Yandex Zen.

The platform helps users gather and optimize their semantic core (keywords), analyze competitor websites, study search visibility, and track advertising strategies.

At the time of writing, the Keys.so database contains information on 18,876,759 domains.

Competitor Keyword Share

Keys.so’s competitor keyword analysis enables users to gain insights into the keywords their competitors are ranking for in both organic and paid searches. It allows users to explore the top-performing keywords of competitors and examine which keywords are driving traffic to their sites.

Additionally, it helps identify missed opportunities by revealing gaps where your competitors rank highly but your site does not. This feature is crucial for optimizing your own site’s content and advertising strategy, improving visibility, and outperforming competitors in search rankings.

Semantic Analysis

Semantic Core Management in Keys.so is designed to help users build, manage, and expand their website’s semantic core by analyzing and grouping relevant keywords. The tool offers features such as keyword clustering, which helps organize similar search queries into groups, allowing for more targeted content creation.

Additionally, users can identify new relevant phrases and expand existing keywords to enhance SEO performance. By comparing the semantic core with competitors, users can fill content gaps and improve search visibility, boosting organic traffic.

Backlink Analysis

Link Analysis in Keys.so allows users to explore and assess competitors’ backlink profiles, identifying both incoming and outgoing links. It evaluates the quality of linking domains using a domain rating (DR) metric, helping determine the credibility and strength of backlinks.

Users can also conduct a batch analysis of multiple sites, compare backlinks between competitors, and discover shared or unique link donors. This feature is instrumental in identifying link-building opportunities to enhance your site’s SEO and outperform competitors.

Dan Taylor is the founder and editor of International Search Insights (ISI), the publication behind ReadIsi, and a Partner and Head of Innovation (Search & AI) at SALT.agency. He has worked in search for more than a decade, in-house and agency-side, and is regarded as one of the West’s leading voices on search engines beyond Google, including Yandex, Baidu, Naver and Cốc Cốc. On ReadIsi, Dan covers the engines and AI answer platforms that English-language coverage tends to miss: Baidu and ERNIE, Yandex and Alice AI, Naver, Cốc Cốc, Shenma, Sogou, WeChat and Weibo search, plus DeepSeek and Alibaba’s Qwen. He also keeps dated records of documented changes, such as the Yandex, Baidu and Naver algorithm update histories and the DeepSeek, ERNIE and Qwen model update histories. His approach is to take learnings from global search engines and apply logic with a high evidence threshold. A claim needs a source, patterns seen in one market are treated as a hypothesis until they are checked in another, and where the evidence is thin he says so. For brands, that means advice built on what can be shown, with measurement that separates being cited from being chosen. Dan is credited with coining the term “edge SEO” and won the inaugural TechSEO Boost research competition in 2018 for his work on CDN and edge changes for SEO. In 2026 he was credited with coining “Infinite Tail” to describe how keyword research is changing with AI search. He is the author of AI Search Marketing For The Travel Sector, writes for Search Engine Journal, Search Engine Land and Travel Marketing Guy, and has advised technology, SaaS, travel and enterprise ecommerce brands, including Cloudflare, GitLab and Airbnb. He has given multiple talks and panels at the International Search Summit in Barcelona, and has also spoken at Optimization Moscow, brightonSEO, Google Search Central Live Deep Dive Asia in Bangkok, Athens SEO and the Asia SEO Virtual Summit 2026, where his talk looked at how Baidu, Naver, DeepSeek, Tencent, Cốc Cốc and Yandex built their own AI answers.