Find niche newsletters that reach the professional audiences behind your next campaign. Compare audience fit, sponsorship formats, published rate information, and direct booking routes—then work directly with the publisher. Learn how newsletter sponsorships work.

A newsletter sponsorship is a paid placement in an email publication. Depending on the publisher, that might be a primary sponsor block, a mid-email feature, a classified placement, a dedicated send, or another sponsor format.
For B2B campaigns, the value comes from audience relevance. A focused publication for cloud engineers, cybersecurity leaders, finance professionals, or growth marketers can be more useful than broad reach with little buyer overlap.
Explore guides for the professional audiences and sponsorship categories below:
Looking to reach SaaS founders, operators, marketers, developers, and revenue teams? These sponsor-ready newsletters are relevant for B2B software companies promoting tools for growth, product, engineering, sales, marketing, and business operations.
Looking to reach AI builders, technical teams, business leaders, and professionals evaluating artificial-intelligence tools? These sponsor-ready AI newsletters are relevant for AI software, developer platforms, data products, automation tools, healthcare technology, and B2B services.
Looking to reach fintech operators, finance leaders, payments professionals, and financial-services decision-makers? These sponsor-ready finance and fintech newsletters are relevant for B2B software, payments platforms, embedded-finance products, compliance tools, and financial infrastructure brands.
Looking to reach B2B marketers, growth leaders, revenue teams, and SaaS decision-makers? These five sponsor-ready B2B marketing newsletters are relevant for software companies, agencies, data platforms, sales tools, and services selling to professional marketing teams.
Looking to reach security engineers, CISOs, cloud-security teams, and technical decision-makers? These five cybersecurity newsletters offer sponsor-ready placements for security platforms, DevSecOps tools, identity products, compliance software, and B2B infrastructure brands.
Looking to reach HR leaders, people teams, recruiters, and workplace decision-makers? These five sponsor-ready HR newsletters help HR software, recruiting platforms, benefits providers, learning tools, and B2B services find relevant professional audiences.
Looking to reach cloud engineers, platform teams, and DevOps leaders? These five sponsor-ready DevOps newsletters help B2B software, infrastructure, security, and developer-tool brands find relevant technical audiences and compare available advertising opportunities.
Looking to reach game developers, indie studios, publishers, and people working in the games industry? These sponsor-ready newsletters are relevant for game-development tools, engines, analytics platforms, art software, audio tools, marketing services, and B2B products for game teams.
Looking to reach software engineers, technical leaders, and developer teams? These five sponsor-ready software engineering newsletters are relevant for DevTools, infrastructure platforms, AI coding tools, cloud products, security software, and B2B services.
Yes—many Substack writers can run sponsored content, but advertising availability, pricing, placement format, and booking process vary by publication. Here is how to find and evaluate Substack newsletters for B2B sponsorships.

A good sponsorship decision is not just about subscriber count. Before you book, compare the details that affect whether a campaign reaches the right people and can be measured clearly.
Audience context: Who reads the newsletter? Look for relevant roles, industries, seniority, company type, or professional interests.
Sponsorship format: Confirm whether the opportunity is a primary sponsor, mid-email placement, classified listing, dedicated send, or another publisher-defined package.
Rate information: Review published rates where available, or use the publisher’s direct booking route to request current terms and availability.
Publication cadence: A weekly newsletter and a daily newsletter can deliver different campaign timing and repeat-exposure options.
Direct publisher route: Confirm there is a clear way to contact or book directly with the publication.
Use these guides to understand how newsletter sponsorships work and how to evaluate pricing:
Newsletter sponsorship pricing is usually sold as a flat fee, CPM, CPC, or multi-issue package. Learn how each model works, what affects the rate, and how to compare B2B newsletter placements before booking.
A newsletter sponsorship directory helps advertisers find publications that accept paid placements, compare audience fit and rates, and book directly with publishers. Learn what to look for before choosing a newsletter sponsorship.
Find B2B newsletter sponsors with public audience data, flat sponsorship rates, and direct booking links. This guide highlights sponsor-ready publications for technology, marketing, HR, finance, and professional audiences.
Email newsletter advertising lets B2B brands reach focused professional audiences through paid sponsorship placements. Learn how to find relevant newsletters, compare sponsorship formats and rates, and book directly with publishers.
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