Monetize Your Newsletter with Sponsorships

Join over 2,000 creators, media companies, and publishers who use Subletter to generate consistent, scalable revenue from their newsletters.

It's 100% free to use — we only take a commission from advertisers. You keep full control over your content. We just help you get paid for it.

✉️ Boost Your Deliverability

Earn Advertisers’ Trust. Get Paid for Every Email You Send

Subletter helps you maintain a clean, high-quality email list from day one — so your emails land in the inbox, not the spam folder.

  • ✅ Earn more with performance-based payouts — get rewarded when your sponsored emails drive real engagement.

  • 💰 Unlock instant revenue, even without being selected by a sponsor. Pick from a list of open campaigns that any publisher can promote.

  • 🛡️ Send only your sponsored emails via Subletter to avoid violating the terms of platforms like Substack — and keep your main newsletter safe.

Whether you've been matched with a sponsor or are tapping into our open marketplace, every email you send through Subletter can generate revenue — with no compromise on deliverability.

Get a clean email list and boost your performance and ad revenue

One bad email can ruin your sender reputation.
Subletter’s built-in email verification system filters out risky, fake, or invalid addresses before you hit send — so your emails are delivered, read, and trusted.

✅ What We Check Before You Send

1. Technical Validity

  • Validates email syntax

  • Checks domain existence + MX records

  • Removes duplicates automatically

2. Smart Filtering

  • Blocks role-based emails

  • Detects disposable emails

  • Flags suspicious usernames

3. Reputation & Risk Analysis

  • Identifies risky/“accept-all” domains

  • Flags previously bounced or spam-trapped addresses

  • Protects your deliverability from reputation loss

📬 Get Sponsorship Requests — Automatically

Let sponsors come to you

Thousands of advertisers — from early-stage startups to global brands — are actively looking to sponsor high-quality newsletters like yours.

  • Receive offers directly in your inbox

  • Accept or decline each one with a single click

  • Work with sponsors across every niche and industry

Start growing your revenue while you focus on writing.

💰 Get Paid for Every Email You Send

Your Audience, Monetized Instantly

No hidden fees. No limits. Just revenue.

  • Write your newsletter as usual

  • Choose a sponsor and get a revenue estimate instantly

  • Send your campaign and earn based on clicks or open rates

You keep full control over your content.
We simply help you get paid for it.

⚠️ Using Substack or Another Platform That Bans Sponsored Content?

Don’t risk getting banned for monetizing your newsletter

Platforms like Substack and Kit prohibit sponsored content in their email delivery systems. Many creators have been suspended — even for transparent and relevant promotions.

With Subletter.io, you can:

  • ✅ Use Substack, Ghost, or Beehiiv for your regular editions

  • ✅ Use Subletter.io only for sponsored emails

  • ✅ Protect your account while continuing to monetize your audience.

Join thousands of newsletter creators who use Subletter.io to grow their revenue through sponsorships

Start receiving sponsorship offers today and monetize every email you send to your subscribers. Use the highest-paying platform for newsletters and boost the performance of your online media.