InboxBanner
    For Substack Publishers

    Automate Sponsor Management for Your Substack

    Stop manually updating HTML every post. Let sponsors rotate automatically while you focus on writing.

    Start Free Trial
    40+
    Substack users
    0 min
    Manual work
    $20
    Avg cost/month
    100%
    Free & paid compatible

    The Substack Sponsor Challenge

    Every post, the same tedious process

    Comparison Factors
    Manual Substack
    Current process
    Automated
    InboxBanner
    Set once, works forever
    Native Sponsor Tools

    Platform support for sponsors

    No native sponsor management

    Full sponsor management platform

    HTML Support

    Custom code flexibility

    Limited HTML, often breaks

    Embed code works perfectly

    Sponsor Analytics

    Performance tracking

    No sponsor analytics at all

    Real-time dashboard with insights

    Rotation Automation

    Automatic sponsor switching

    Manual every single post

    12 rotation algorithms

    Mobile Formatting

    Responsive design

    Breaks on mobile often

    Mobile-perfect by default

    Click category headers to expand/collapse details

    Substack Publishers Love It

    Real results from real publishers

    12k subs
    $1,200/mo

    "Went from 1 sponsor to 4 without extra work. Time saved let me write more content."

    6k subs
    $800/mo

    "Sponsors renewed at higher rates. The professional dashboard impressed them."

    25k subs
    $2,400/mo

    "Automated rotation = no more sponsor disputes. Analytics show fair distribution."

    Works With All Substack Tiers

    Free, Paid, or Combo—you choose

    Free Substack

    Monetize with sponsors while keeping your Substack free for readers

    ✓ Perfect for growing newsletters

    Paid Substack

    Show different sponsors to paid vs free tiers automatically

    ✓ Tier-based sponsor control

    Combo Model

    More sponsors for free readers, fewer for paid subscribers

    ✓ Best of both worlds

    Simple, Transparent Pricing

    Pay for what you use

    Platform Fee

    $15

    /month

    Usage

    $0.00021

    /impression

    3k subs × 45% open$16/month
    10k subs × 40% open$17/month
    25k subs × 35% open$18/month

    ROI Example

    $193 saved/month

    Time worth $30/hr × 7 hours saved - $17 cost = $193

    Setup in 15 Minutes

    1

    Create InboxBanner account

    2 min

    Sign up free. No credit card required.

    2

    Get embed code

    1 min

    Copy your unique code from dashboard.

    3

    Add to Substack

    5 min

    Settings → Export → Add embed code to footer or template

    4

    Upload sponsors

    5 min

    Drag-drop images or HTML creatives

    5

    Configure rotation

    2 min

    Set fair, weighted, or scheduled rotation

    ✅ Done! Sponsors appear automatically in every post.

    Write, publish, repeat. Never touch sponsor HTML again.

    Ready to Automate Your Substack Sponsors?

    Join 40+ Substack writers focusing on content, not logistics.

    Start 60-Day Free Trial

    No credit card • Works with free & paid tiers • Cancel anytime