Sponsor comparison
Trendos vs Sandcastles
Newsletter sponsorship activity, audience reach, and ad formats — side by side.
Sponsorship breakdown
Advertising
Marketing
Science Says
30K subscribers
Kallaway
440K subscribers
30K subs
440K subs
Launching: Trendos Ad Radar. The first ever tool to make ChatGPT ad data accessi…
Use Sandcastles to grow 10x faster on social media (try risk-free): https://sand…
May 2026
August 2026
Ad copy examples
Trendos
Launching: Trendos Ad Radar. The first ever tool to make ChatGPT ad data accessible. Try it for free to see who’s advertising in ChatGPT, what ad copy competitors are running, and how often their ads appear.
Sandcastles
Use Sandcastles to grow 10x faster on social media (try risk-free): https://sandcastlesai.com/96; Try Sandcastles, my short-form tool that will help you grow 10x faster on social media (free trial): https://sandcastlesai.com/96
More comparisons
Similar sponsors
Get the full sponsor picture
Contact details, decision makers, email addresses, and complete sponsorship history for both brands.
Start free — no card needed