The Newsletter Ad Index: December 2025
Who bought newsletter ads in December 2025, counted from the issues we read. A brand counts once per newsletter, however many issues it bought.
Top sponsors
Nothing ranked yet this month.
New to newsletters
Brands we saw sponsor a newsletter for the first time in December 2025, in newsletters we've read for at least two months.
- Honeycomb · Developer tools in The Data Hustle
- Open · Media & entertainment in Drinks First
- Sentry · Developer tools in Acquired
- Sintra · Productivity & collaboration in World Builders
Topics by sponsors
How many brands bought each kind of newsletter. We add newsletters every week, so compare months with care.
| Newsletter topic | Sponsors |
|---|---|
| Crypto | 4 |
Kinds of company buying
| Sponsor's business | Sponsors |
|---|---|
| Developer tools | 4 |
| Investing & trading | 3 |
Counted from the issues we read: public archives and the issues newsletters email to subscribers. A sponsor in a newsletter we don't read isn't counted. For where to buy, see newsletters to advertise in, by topic.
Oct 2026Sep 2026Aug 2026Jul 2026Jun 2026May 2026Apr 2026Mar 2026Feb 2026Jan 2026Dec 2025Nov 2025