The pillar-and-cluster model HubSpot popularized in 2017 still shows up in pitch decks. The ground has shifted: AI search summarization, intent fragmentation, schema-driven SERP. The model isn’t dead, but it needs a 2026 reset.
The old model and what broke
Old: pick a head term (“CRM software”), build a 3,000-word pillar, surround it with 8-12 supporting cluster posts that all link to the pillar. It worked when Google rewarded topical depth at the page level.
What broke: AI-generated overviews now answer the head-term query directly. The pillar page sits below the fold, gets fewer clicks, and ranks based on entity authority rather than a single page’s depth.
The new model: pillar as proof, cluster as inbound
Treat the pillar page as a credibility artifact, not a traffic generator. Its job is to demonstrate to AI crawlers, link evaluators, and human readers that you have the most cohesive coverage of the topic. Optimize it for citation, not just ranking.
Cluster posts now do the traffic work. They target specific intents (“how to deduplicate HubSpot contacts,” “HubSpot custom code action examples”), each ranking on its own merit.
Use HubSpot’s content strategy tool, then ignore its grade
HubSpot’s Topic tool will show you cluster relationships and grade your pages. The grade rewards keyword density and internal linking volume; modern SEO rewards entity coverage and cited sources. Use the tool for the visualization; ignore the grade.
Cluster sizing
Aim for 8-15 cluster posts per pillar. Below 8, the cluster lacks topical authority. Above 15, you’re producing for the model rather than for the reader. Quality flags rise; ranking suffers.
Internal linking discipline
Every cluster post links to the pillar with descriptive anchor text. The pillar links back to clusters, organized by sub-topic. Don’t auto-generate “related posts” widgets; curate the internal link map manually.
Pillar: "The HubSpot Operations Hub Guide"
Cluster: "Operations Hub Data Sync Edge Cases"
Anchor: "data sync architecture in Operations Hub"
NOT: "click here for more"Schema markup for both
Pillar gets Article + BreadcrumbList. Each cluster gets Article plus the right specialized schema (HowTo for tutorials, FAQPage for Q&A). Schema is what gets you cited in AI overviews.
Refresh cycle
Update each pillar quarterly. Cluster posts get refreshed annually. A pillar that hasn’t been updated in 12 months drops in trust signals across both Google and LLM-driven search.
Measure differently
Don’t measure the pillar by traffic alone. Measure by: AI overview citations (track manually for top queries), inbound links earned, and assisted conversions in HubSpot’s attribution report.
What to do this week
Pick one existing pillar page. Audit whether it earns AI citations on its head term (search the term in ChatGPT, Perplexity, Google AI Overviews). If not, rewrite the intro for citability: clear definition in the first 100 words, structured headings, sourced statistics.
