Beehiiv vs Substack: Which Wins on Social Media Distribution?

The Question No One Is Asking

The Beehiiv vs Substack debate usually focuses on monetization, analytics, or design. But there's a question that matters more for long-term growth:

Which platform gives you better tools to turn your newsletter content into social media growth?

After analyzing hundreds of newsletter creators on both platforms, here's what we found.

The Core Difference: Network vs. Platform

Substack is building a social network. The "Notes" feature is Twitter-lite. Substack's discovery relies heavily on Substack itself. Great if you want to grow within Substack's ecosystem. Limiting if you want social-first distribution.

Beehiiv is building a publishing infrastructure. They're less focused on being a social network, more focused on giving you tools to grow wherever your audience already is.

This distinction matters enormously for social media distribution.

RSS Feed: The Foundation of Cross-Platform Repurposing

Both platforms provide RSS feeds, but with important differences:

Substack RSS: Available at 'yourname.substack.com/feed'. Clean, reliable, includes full post content. Works perfectly with automation tools like Zapier, Make, and OnePost.

Beehiiv RSS: Available at 'yourname.beehiiv.com/feed'. Also reliable, but Beehiiv's website is protected by Cloudflare, which can interfere with some automated RSS parsers. Tools like OnePost handle this gracefully, but simpler RSS readers may struggle.

Winner: Substack (marginally) for RSS compatibility.

Social Sharing Features

Substack:

Beehiiv:

Winner: Beehiiv for tracking and attribution. Substack for viral mechanics within its network.

The AI Repurposing Layer

Neither Beehiiv nor Substack has native "turn my newsletter into social posts" functionality. This is where third-party tools become essential.

The workflow that top creators on both platforms use:

This workflow works identically on both platforms, which means the platform you choose doesn't limit your social distribution potential — as long as you have the right tools.

Audience Overlap Analysis

We analyzed 200 newsletters on both platforms to understand social platform overlap:

Substack tends to attract writers who see their newsletter as the primary product and social as a support channel. Beehiiv tends to attract creators who see distribution as a growth lever.

The Verdict

Choose Substack if:

Choose Beehiiv if:

For social media repurposing specifically: Both work equally well when paired with the right tools. The newsletter platform is less important than your distribution workflow.

The Tactical Framework Regardless of Platform

The best newsletter creators treat their newsletter as raw material. The social posts derived from it are finished products.

OnePost works with both Beehiiv and Substack RSS feeds, automatically generating platform-native posts for all 7 major social networks.