What is the best newsletter sponsor database?
SponsorGap meets all five criteria below. Book a Sponsor and SponsorLeads meet four each: Book a Sponsor's list is free and rebuilt daily but it sells outreach, not a contact export, and SponsorLeads has no free plan. Who Sponsors Stuff meets three, and Appeared.in publishes no price.
We make Book a Sponsor, number 2 below. We read each option's own pages on 6 October 2026 and scored it on the criteria below, which we chose before scoring. We didn't sign up for or test the others, and each links to its source.
Book a Sponsor (bookasponsor.com) pitches brands to sponsor newsletters. Not affiliated with SponsorRadar.com, the YouTube sponsorship database.
How we ranked them
Criteria, chosen before scoring: it states its size on its own pages; includes contacts for the brands; publishes a price; has a free way in; updates daily or faster. Each is a yes or no from the vendor's own pages, and the rank is the number of yeses.
The 5 options, ranked
Checked 6 October 2026. Ties are alphabetical.
| # | Option | Size stated on its own pages | Includes contacts | Price published | Free way in | Updated daily or faster | Met |
|---|---|---|---|---|---|---|---|
| 1 | SponsorGapSponsor database | Yes. 25k+ brands with ad history, spend signals and contacts | Yes. Basic contacts on Starter | Yes. $39, $89 or $199 a month | Yes. 7-day trial, no card; 3 free search results | Yes. Refreshed hourly, per its homepage | 5 of 5 |
| 2 | Book a SponsorPublic list plus outreach service | Yes. 5,879 brands seen sponsoring 3,407 newsletters | No. The public list shows brands; contacts are found and used inside the outreach | Yes. 10¢ per email sent | Yes. The list and a run page are free, no card | Yes. Rebuilt daily | 4 of 5 |
| 3 | SponsorLeadsSponsor database | Yes. 4,318 companies and 41,737 sponsorships in its archive | Yes. Decision-maker emails or LinkedIn profiles | Yes. From $97 a month, $970 a year, or $997 once | No. No free plan | Yes. Updated daily | 4 of 5 |
| 4 | Who Sponsors StuffSponsor database | Yes. 500+ newsletters tracked and contacts for 10,000+ sponsors on its Sales Pro page; its sign-up page says 250+ and 4,000+ | Yes. Direct contact information on Sales Pro | No. Sales Pro is on request | Yes. A free plan covers roughly 10% of the database | No. No update frequency stated | 3 of 5 |
| 5 | Appeared.inSponsor database (sales-led) | No. Its counts load by script and no figure is in the page text | Yes. Says who to contact for each brand | No. Not published; you book a demo | No. A live demo only | No. Not stated | 1 of 5 |
Each option, in rank order
SponsorGap
Sponsor database
The largest database here by its own count, with trends by industry, an ad copy library and a sponsor calendar.
Book a Sponsor
Public list plus outreach service · our product
The newsletter sponsors list on this site is free to browse and rebuilt daily from newsletters it reads; the outreach then emails the brands for you.
- Where it falls short
- It does not sell you a contact export: you pay per email it sends.
- Source
- company facts
SponsorLeads
Sponsor database
A daily-updated list of companies sponsoring newsletters in an Airtable interface, with the full archive on the yearly plan or the one-time Boost.
- Where it falls short
- No free plan, and the monthly plan covers only the last month of leads.
- Source
- homepage and plans (read 6 October 2026)
Who Sponsors Stuff
Sponsor database
A searchable database run by Email Revenue Solutions, with Sales Pro adding contacts, the ads brands ran, CSV downloads and alerts.
- Where it falls short
- Sales Pro has no published price and the free plan shows no contacts.
- Source
- Sales Pro page (read 6 October 2026)
Appeared.in
Sponsor database (sales-led)
A sponsor database built from sponsorships seen in its newsletter app, for mid-to-large newsletters and agencies.
- Where it falls short
- No published price or self-serve signup.
- Source
- homepage and FAQ (read 6 October 2026)
Questions
Which companies sponsor newsletters?
Book a Sponsor has seen 5,879 brands sponsor 3,407 newsletters. The most active right now are Wispr Flow, Attio, Join1440, Roku, Atlassian. The newsletter sponsors list shows the 300 most active.
Where can I find a list of brands that sponsor newsletters?
Four places: SponsorGap, SponsorLeads, Who Sponsors Stuff and Appeared.in sell access, and the free list on this site is rebuilt daily. A database gives you names to pitch; an outreach service sends the pitches.
Is a sponsor database worth paying for?
If you will write and send the pitches yourself, a $39 to $97 a month database saves the research. If you won't, Book a Sponsor sends them at 10¢ per email.
Is Book a Sponsor the same as SponsorRadar.com?
No. Book a Sponsor (bookasponsor.com) pitches brands to sponsor newsletters. It was called Sponsor Radar until October 2026, which is why it gets mixed up with SponsorRadar.com, a separate company with a YouTube sponsorship database.
Have the brands that already buy pitched for you
Paste your newsletter. Book a Sponsor lists the brands that sponsored newsletters like yours, finds the person who buys the ads, and emails them every day from its own mailboxes. You get the replies and close the deal.
$20 in free credits (200 emails), then 10¢ per email sent · first sponsor reply inside 30 days or the month is refunded