How I Built This with Guy Raz

Advice Line with Anthony Casalena of Squarespace

November 20, 2025

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  • Squarespace's CEO Anthony Casalena views customers, not just shareholders, as the ultimate bosses, a dynamic that remains consistent whether the company is public or private. 
  • For a high-value, personalized product like custom mattresses, the website's branding and clear communication of the scientific value proposition are crucial for building consumer trust over material prestige. 
  • For niche, high-value products or new concepts (like All Better Co. or Kahani), leveraging authentic user testimonials and finding strategic partnership/seeding opportunities (like hotel placements or community engagement) can be more effective than broad advertising for building initial awareness. 

Segments

Squarespace CEO Role & Status
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(00:02:02)
  • Key Takeaway: Anthony Casalena views customers as the ultimate bosses, regardless of Squarespace’s public or private status.
  • Summary: Guy Raz welcomes Anthony Casalena, founder and CEO of Squarespace, to the Advice Line segment of “How I Built This with Guy Raz.” Casalena confirms that taking Squarespace private after being public did not significantly change his day-to-day operations. He asserts that running a company always involves having a boss, whether it is shareholders or, fundamentally, the customers.
Squarespace Business Expansion & AI
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(00:04:40)
  • Key Takeaway: Squarespace has expanded beyond websites to include e-commerce, scheduling (Acuity), and domain registration (via Google Domains acquisition).
  • Summary: Squarespace now offers a complete suite of tools for online presence, including e-commerce and scheduling via Acuity. The company also became a major domain registrar by acquiring assets from Google Domains. Casalena notes that AI is integrated into over 15 touchpoints, including their Blueprint AI product, which was recently named one of Time’s 100 best inventions.
Website Relevance in AI Search Era
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(00:06:35)
  • Key Takeaway: Websites remain relevant because answer engines crawl them for data and use them for real-time queries when internal knowledge is insufficient.
  • Summary: The rise of chatbots for search does not diminish the need for a website; websites are essential sources for answer engines’ indexing and real-time information retrieval. Direct customer interactions like booking appointments or purchasing products still rely on direct interaction facilitated by the website.
Custom Mattress Tech & Marketing
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(00:09:09)
  • Key Takeaway: Custom Sleep Technology uses proprietary AI to mathematically design mattresses using Talalay latex densities tailored to individual body profiles, supporting spinal alignment.
  • Summary: Bob Zakowski of Custom Sleep Technology creates mattresses specific to each sleeper’s body characteristics using a questionnaire and AI design. The mattresses exclusively use Talalay latex, which comes in multiple densities to support different body areas separately. Bob’s question focused on growing awareness beyond traditional retail, suggesting partnerships with wellness tech or athlete endorsements.
Advice on Mattress Brand Awareness
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(00:13:40)
  • Key Takeaway: For a high-end, scientific product, branding should emphasize the scientific benefit (e.g., Talalay latex application) over luxury materials, and partnerships with sleep tech brands could aid scaling.
  • Summary: Anthony Casalena suggested Bob’s website looked dated and advised focusing on a scientific message rather than luxury materials. Both agreed that exploring partnerships with sleep tracking brands (like Eight Sleep or Whoop) could be a viable angle for licensing the technology under an established umbrella to gain scale.
Clean First Aid Product Strategy
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(00:23:10)
  • Key Takeaway: All Better Co. targets moms as primary influencers while focusing on convenience-based purchasing channels like airports and retail cash wraps.
  • Summary: Stacey Bernstein’s All Better Co. offers ‘Better for You, Better for the Planet’ first aid essentials, replacing items like hydrocortisone with proprietary formulas. The brand is currently D2C, Amazon, and in 100+ retail locations, including Four Seasons properties. The advice centered on leveraging the product’s travel-friendly design for impulse buys in high-convenience locations like airports.
Communicating Product Differentiation
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(00:33:37)
  • Key Takeaway: Packaging for disruptive CPG products should adopt the simple, quantifiable messaging style seen in food labeling (e.g., macros) to quickly convey benefits over legacy competitors.
  • Summary: The discussion highlighted that All Better Co.’s packaging needs to better communicate its scientific advantages (e.g., chemical-free, biodegradable) beyond just the name ‘Better Bandage.’ Adopting simple, quantifiable metrics, similar to how food products display protein or carb counts, could effectively communicate efficacy against established brands like Neosporin.
Digital Recovery Companion Launch
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(00:38:57)
  • Key Takeaway: Kahani, a personalized recovery companion app for eating disorders, targets highly motivated women in their 30s and 40s who are post-treatment and seeking ongoing support.
  • Summary: Mahek Mohan’s app, Kahani, applies evidence-based therapies (like CBT/DBT) in personalized, bite-sized formats for 24/7 support between clinical sessions. The app achieved a 23% symptom decrease in four weeks among super-users during its pilot phase with 100 participants. The primary launch challenge is overcoming app fatigue by targeting users through community engagement where they are already seeking support.
Advice on App Growth & Storytelling
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(00:46:27)
  • Key Takeaway: Authentic, vulnerable user stories shared virally (like on TikTok) are the most trusted form of marketing for sensitive subscription services like Kahani.
  • Summary: Anthony Casalena suggested focusing on the method’s origin—whether it’s based on a known protocol or a new implementation—to establish authority. The most effective growth mechanism identified was leveraging highly engaged users to share their success stories authentically, as word-of-mouth builds crucial trust for a commitment-based service.
Founder’s Retrospective Advice
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(00:51:12)
  • Key Takeaway: Anthony Casalena advises his younger self to identify and accelerate decisions he consistently delays, recognizing that errors usually occur from moving too slowly rather than too quickly.
  • Summary: When asked what advice he would give his younger self, Casalena focused on recognizing patterns of delayed action. He noted that he frequently regrets decisions he postponed, suggesting a need to proactively address actions he instinctively hesitates on. This highlights a personal tendency to err on the side of caution rather than speed.