10 Best Newsletter Sponsorship Marketplace Tools for Founders [2026 Updated]

1. Paved

• Type: Paid
• URL: https://www.paved.com
• Overview: Paved is a newsletter advertising marketplace that connects advertisers with a large network of newsletter publishers. It offers campaign planning, placement management, and performance tracking in one platform.

2. Swapstack

• Type: Free
• URL: https://swapstack.co
• Overview: Swapstack is a marketplace where advertisers discover newsletters, podcasts, and creators to buy sponsorship placements. It lets publishers list their inventory and handles bookings and payments between both sides.

3. Letterhead

• Type: Paid
• URL: https://tryletterhead.com
• Overview: Letterhead is a platform for newsletter publishers that combines a sponsorship marketplace with tools for managing ad sales and partnerships. It helps brands find newsletters to sponsor and helps creators monetize their audiences.

4. Passionfroot

• Type: Free
• URL: https://www.passionfroot.me
• Overview: Passionfroot is a creator sponsorship platform where brands can find and book newsletter writers, podcasters, and other creators. It streamlines briefing, contracts, and payments so sponsorship deals close faster.

5. beehiiv Ad Network

• Type: Paid
• URL: https://www.beehiiv.com/ad-network
• Overview: The beehiiv Ad Network lets advertisers run sponsored placements across a pool of newsletters built on the beehiiv platform. Publishers can opt in to earn revenue from ads matched to their audience.

6. SparkLoop

• Type: Paid
• URL: https://sparkloop.app
• Overview: SparkLoop provides a partner network where newsletters recommend each other to grow subscribers. Advertisers pay per acquired subscriber, making it a performance-based newsletter growth marketplace.

7. Duet

• Type: Paid
• URL: https://www.duet.so
• Overview: Duet is a newsletter sponsorship tool that helps publishers manage ad inventory and helps advertisers book placements across newsletters. It centralizes campaign details, scheduling, and sponsor communication.

8. Goodie

• Type: Paid
• URL: https://www.goodie.io
• Overview: Goodie is a newsletter advertising platform that helps brands buy sponsored placements across a network of email newsletters. It supports campaign setup, creative handling, and reporting for advertisers.

9. Newsletter Operator

• Type: Paid
• URL: https://www.newsletteroperator.com
• Overview: Newsletter Operator is a newsletter advertising agency and network that places sponsored ads across a curated set of newsletters. It manages sourcing, booking, and reporting so brands can buy newsletter ads without handling each publisher individually.

10. LiveIntent

• Type: Paid
• URL: https://www.liveintent.com
• Overview: LiveIntent is an email advertising platform that connects advertisers with publisher newsletters through programmatic and direct buying. It offers audience targeting and measurement for brands advertising in email inventory at scale.