Customer logos / Substack

Startups showing Substack as a customer

5 of the 1,841 startups whose homepage shows customer logos include Substack's logo in a section the page labels as customers; 1 added it in the last 12 months.

Recently added

1. Casco added it
   Between 28 October 2026 and 5 November 2026

All startups showing it (latest capture)

• Casco 5 November 2026
• Diffuse Bio (Diffuse) 6 November 2026
• Mux 6 November 2026
• Pangram Labs, Inc. 6 November 2026
• Unitary 6 November 2026

A logo on a startup's website is the startup's own claim, not a confirmed customer relationship. How this is counted.

Cite this page

StartupHistory, “Startups showing Substack as a customer”, https://startuphistory.org/logos/substack (accessed 8 November 2026)

Machine-readable: /logos/substack.json