Define the central entity
Source Context sets the central entity, your content moat and competitive angle, so every later step knows what the site is about.
Semantic SEO software
The semantic SEO tool built around entities, not keywords
SemanticOS plans, briefs and audits your site the way search engines understand it: as a network of entities, attributes and intents. One workflow takes you from your central entity to a published, internally linked topical map.
2 hours free, no credit card · or a 7-day full trial for $7 · runs on your own Claude API key
What is semantic SEO?
Semantic SEO is optimising a website around entities, their attributes and search intent instead of isolated keywords. Rather than writing one page per keyword, you cover a topic the way a knowledge graph describes it: what the entity is, which attributes matter, how it relates to other entities, and which questions people ask at each stage of intent.
Search engines rank pages by understanding meaning, not by counting keyword matches. A site that covers an entity completely and consistently, with a clear central topic, earns topical authority: its pages rank more easily because the whole site supports them.
A semantic SEO tool helps you plan and check that coverage. SemanticOS is built entirely around it, from the first definition of your central entity to the final audit.
Capabilities
What a semantic SEO tool has to do, and how SemanticOS does it
Model entities & attributes
EAV Architecture, Attribute Mapper and Lexical Relations turn the entity into attribute and value chains, synonyms and related terms.
Map the query network
Query Intent Topology, Query Decomposer and SERP Landscape map the intents and questions around your entity before you write anything.
Plan the content network
The topical map generator and Silo Architect turn that model into pillars, clusters and supporting pages.
Brief and write semantically
The content brief generator specifies entities, headings and questions per page; Content Studio drafts from the brief.
Protect entity consistency
Entity Drift, SPO Triple Auditor, Heading Audit, Information Gain and KG Alignment check that published content stays on-entity.
Structured data
Entity Schema Graph builds connected JSON-LD (Organization, WebSite, WebPage, Person, Article) linked by @id.
Trust & E-E-A-T
Trust & E-E-A-T, Author Builder and Credential Builder plan the pages, author entities and proof a trustworthy source needs.
Measure & iterate
GSC Search Analytics, Competitor Radar, Content Refresh and Bulk URL Audit show what to fix next on a live site.
Semantic SEO vs. traditional keyword SEO
| Keyword-first SEO | Semantic SEO with SemanticOS | |
|---|---|---|
| Unit of planning | One keyword, one page | An entity and its attributes across a network of pages |
| Content plan | A keyword list sorted by volume | A topical map with Core and Outer sections and internal links |
| Briefs | Target keyword and word count | Entities, attributes, headings, questions and a scorecard |
| Quality checks | Keyword density and on-page score | Entity drift, information gain, intent conflicts, cannibalization |
| Structured data | Added page by page, if at all | One connected entity graph across the site |
How SemanticOS compares with other SEO content tools
Content optimisation tools like Surfer SEO and MarketMuse are strong at scoring and improving a single page against its competitors. SemanticOS works one level up: it plans the whole site first (entity model, topical map, internal links), then briefs and audits each page against that plan. Many teams use a page optimiser alongside it; SemanticOS decides which pages to write and how they connect.
87 modules in one workflow
The platform is organised as a nine-step core workflow (Domain Input, Source Context, Trust & E-E-A-T, EAV Architecture, Keyword Research, Topical Map, Content Briefs, Link Matrix, Topical Audit), a site planner, and specialised tools for competitor analysis, local SEO, e-commerce and legal SEO, programmatic SEO and multilingual projects in 15+ languages. Starter includes the 19 core modules, Pro adds up to 51, and Agency unlocks all 87.
AI runs on your own Claude API key, so usage is billed by Anthropic at cost and SemanticOS never caps how many maps or briefs you generate.
FAQ
Frequently asked questions
What is a semantic SEO tool?
A semantic SEO tool helps you plan and optimise a website around entities, attributes and search intent instead of individual keywords. SemanticOS covers the full process: defining the central entity, building the entity-attribute-value model, generating the topical map, writing briefs and auditing published content for entity consistency.
Is semantic SEO different from entity SEO?
They overlap heavily. Entity SEO focuses on making sure search engines recognise and connect your entities; semantic SEO is the broader practice of structuring content around those entities, their attributes and the intents around them. SemanticOS supports both, including entity schema graphs for structured data.
Do I need to be an SEO expert to use SemanticOS?
No. The core workflow runs in a fixed order and each step explains what it decides and why. Experienced SEOs get the advanced modules, such as SPO triple audits, predicate coverage and ranking-state simulation, when they need them.
Does SemanticOS replace Surfer SEO or MarketMuse?
It covers a different job. Page optimisers score one page against competitors; SemanticOS plans the whole site, briefs every page and audits the result against your topical map. Some teams use both.
Which languages does SemanticOS support?
Topical maps and briefs can be generated in 15+ languages with a multilingual mode that adapts entity-attribute structures to regional search intent instead of translating an English plan.
What does SemanticOS cost?
Starter is $59/month, Pro $99/month and Agency $199/month. You can try it for 2 hours free without a card, or run a full project in a 7-day trial for $7. You provide your own Claude API key.
Keep exploring SemanticOS
Your topical map, generated in minutes.
Enter your domain, define your central entity and get a complete, entity-based content plan: map, briefs, internal links and audit.