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Substack

Brands
Technology
Playground →Docs

Substack's ten nearest neighbors span journalists, authors, media-focused websites, and a fashion brand — with no other Technology entity appearing in the top 10. That cross-kind composition, compressed into a narrow similarity band (0.9572 to 0.9659), is the defining structural feature of this audience.

The shape is flat: no single neighbor dominates. Anand Giridharadas leads at 0.97, followed closely by Medium at 0.96 and Maria Popova at 0.96 — but the gap between first and tenth is less than a point. Journalists make up the largest subcategory slice, with Lauren Duca (0.9587), Rukmini Callimachi (0.9574), and Yashar Ali (0.9572) all landing in the top 10. Media-adjacent websites round out the cluster: Nieman Lab at 0.9587 and Vox at 0.9585 sit alongside ProPublica (0.9573), a non-profit newsroom. The outlier by kind is Warby Parker at 0.9587 — a fashion brand whose audience shape nonetheless lands squarely inside this otherwise media-and-writing cluster.

The overall picture is an audience defined by engagement with long-form writing, independent journalism, and media criticism — drawn from across entity types rather than concentrated in any single one.

Nearest neighbors by audience shape

Cosine similarity over Persona Live audience composition.
"Entities whose overall audience profile most closely matches this one — people who follow one tend to follow the other."

Raw data

Attention graph /similar sample results  (free):
{ "handle": "substackinc", "title": "Substack", "category": "Brands", "subcategory": "Technology", "resolved": "substackinc", "k": 10, "shape": "flat", "filter": null, "results": [ { "handle": "anandwrites", "title": "Anand Giridharadas", "category": "Celebrities and Influencers", "subcategory": "Authors", "similarity": 0.9659, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "medium", "title": "Medium", "category": "Marketing Channels", "subcategory": "Websites", "similarity": 0.9629, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "brainpicker", "title": "Maria Popova", "category": "Celebrities and Influencers", "subcategory": "Authors", "similarity": 0.962, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "niemanlab", "title": "Nieman Lab", "category": "Marketing Channels", "subcategory": "Websites", "similarity": 0.9587, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "warbyparker", "title": "Warby Parker", "category": "Brands", "subcategory": "Fashion", "similarity": 0.9587, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "laurenduca", "title": "Lauren Duca", "category": "Celebrities and Influencers", "subcategory": "Journalists", "similarity": 0.9587, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "voxdotcom", "title": "Vox", "category": "Marketing Channels", "subcategory": "News Publishers", "similarity": 0.9585, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "rcallimachi", "title": "Rukmini Callimachi", "category": "Celebrities and Influencers", "subcategory": "Journalists", "similarity": 0.9574, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "propublica", "title": "ProPublica", "category": "Organizations", "subcategory": "Non-Profit", "similarity": 0.9573, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] }, { "handle": "yashar", "title": "Yashar Ali", "category": "Celebrities and Influencers", "subcategory": "Journalists", "similarity": 0.9572, "drivers": [ "A02", "G01", "G03", "I01", "H02" ] } ] }
Full Attention graph /similarity /affinity /demographics available with  API key: