The newsletter sponsorship marketplace built for booking
Stop chasing rate cards over cold email. LetterBid shows you newsletters that fit your campaign, with audience size, open rate, placements and prices up front, so you can send an offer in minutes and pay only once a newsletter says yes.
What is a newsletter sponsorship marketplace?
A newsletter sponsorship marketplace is a platform where brands discover newsletters, compare their audiences and prices, and book paid placements in them, while newsletter creators list their sponsorship packages and get paid through the same system. LetterBid is a newsletter sponsorship marketplace where brands pay only after a newsletter accepts, and the payment is held until the sponsorship is delivered and approved.
Most newsletter ad deals still happen the slow way: you find a newsletter, hunt for a contact, ask for a media kit, wait for a rate card, negotiate over email and then hope the invoice, the creative and the send date all line up. A marketplace replaces that loop with one place to search, compare, negotiate, pay and review results.
On LetterBid, every newsletter has a profile with its niche, subscriber count, open rate, sending frequency, audience countries and the placements it sells. Newsletters can earn a Verified badge after the LetterBid team reviews their analytics, so you are not relying on a self-reported screenshot in a PDF.
Everything you need to buy newsletter ads in one place
Campaign matching: Create a campaign and LetterBid shows newsletters that fit it, each with short reasons why it was recommended, so you start from a shortlist instead of a blank search.
Filters that matter to media buyers: Narrow results by category, subscriber range, minimum open rate, country, sending frequency, price, placement type, verification and level. Sort by best match, subscribers, open rate or price.
Verified audience numbers: Newsletters can send analytics screenshots from their platform for review. Once approved, they show a Verified badge and their audience numbers are locked until they verify again.
Listed prices or custom offers: Book a pack at the price shown, or propose your own number. The newsletter can accept, decline or counter, with up to 3 counter offers before you agree.
Payment held until delivery: Nothing is charged when you send an offer. Once accepted, you pay to secure the date and LetterBid holds the money until you approve the delivery report.
Results measured by LetterBid: Your links run through a LetterBid tracking link, and reports show Filtered clicks: measured by LetterBid, with bots and repeat clicks removed.
How booking works on the marketplace
1. Create a campaign: Choose Direct for one newsletter, Multi-newsletter to send one offer to several newsletters in a date window, or Recurring for a monthly placement with the same newsletter.
2. Pick newsletters and send offers: Review matched newsletters, compare audience, open rate and price, then book a listed pack or send a custom offer. Sending is free and you can withdraw before they reply.
3. Pay once they accept: When a newsletter accepts, you pay the exact price shown to secure the booking. LetterBid holds the payment and you can chat with the newsletter on the booking page.
4. Review the delivery report: After publication the newsletter sends a report with the live link, screenshots and results. You have 3 days to approve it or report a problem before the newsletter is paid.
Why brands buy newsletter sponsorships on LetterBid
Newsletter advertising works because readers chose to be there. The hard part has always been the buying process. LetterBid keeps the reach and removes the risk and admin.
No subscription, no platform fee added on top of the listed price
Prices and placements visible before you reach out
Brand pays only after acceptance, never in advance
Full refund if a newsletter cancels or doesn't deliver
Cancel a paid booking for a full refund up to 72 hours before publication
Receipts for every payment in Billing & invoices
Frequently asked questions
How do I find newsletters to sponsor on LetterBid?
Create a campaign and LetterBid shows newsletters that match it, with their audience size, open rate, placements and prices. You can refine the list with filters such as category, country, open rate and price. You can also book straight from a newsletter's public storefront if you already have one in mind.
Is the newsletter sponsorship marketplace free for brands?
Yes. Creating a brand account, browsing matched newsletters and sending offers are free, with no subscription. You only pay the price of a sponsorship once a newsletter accepts it. LetterBid's 25% fee comes out of that price, not on top of it.
How do I know a newsletter's numbers are real?
Newsletters can apply for a Verified badge by sending dashboard screenshots from their email platform, including subscriber count, recent open rate and clicks, and audience location. The LetterBid team reviews them before the badge appears. Verified numbers are locked, so if they change, the newsletter has to verify again.
What ad formats can I book?
Newsletters on LetterBid can sell three placements: a dedicated email where the whole send is about your brand, a sponsored ad inside a regular issue, and a banner ad. Each newsletter chooses which ones it offers and sets its own prices. Some also sell bundles that combine placements for one price.
Can I sponsor several newsletters with one offer?
Yes, with a Multi-newsletter campaign. You send one offer to several newsletters inside a date window, each newsletter picks the exact day that suits it, and you pay once after every newsletter has replied.
What happens if a sponsorship doesn't run?
You get a full refund. That covers a newsletter cancelling after payment, not sending its delivery report within 5 days, or not fixing a reported problem within 72 hours. If you can't agree on something else, press Get help and LetterBid support reviews the case while the money stays held.
How soon can my ad run?
Placements can be booked as little as 48 hours ahead, depending on each newsletter's minimum notice. For dates at least 7 days away, the newsletter has 72 hours to reply and you have 72 hours to pay. Closer dates use shorter windows.
Can I contact newsletters outside the marketplace?
No. Messages and payments stay on LetterBid, because that is the only way your payment can be held and protected. Once a booking is paid, you can chat with the newsletter directly on the booking page.