What it is
Letterly is an AI-powered tool that transforms your newsletter into ready-to-post content for Twitter, LinkedIn, and beyond. It helps you grow organically without wasting hours repackaging everything.

Who it’s for

• Newsletter creators who want more reach without doubling their workload.

• Solopreneurs, indie hackers, and creators building audiences around their expertise.

• Writers who would rather focus on ideas than grind out distribution.

The problem
Writing your newsletter is just the start. The real work begins when you need to turn it into posts, threads, and shareable pieces that attract new readers. Doing this manually is slow, repetitive, and mentally draining, which makes consistent growth nearly impossible.

How it works

1. Paste in your newsletter or drop a URL.

2. Set your persona and tone so the posts sound like you.

3. Pick a thread or post style.

4. Choose Creative Mode to let AI add new angles, or Strict Mode to stick closely to your text.

5. Pick an image generation style for AI-made visuals.

6. Add a custom CTA and decide where it appears in the thread.

7. Letterly delivers polished, growth-ready content in minutes.

Key features

• Persona and tone control, from bold to conversational.

• Creative Mode vs Strict Mode for flexibility in how much the AI contributes.

• AI image generation to create visuals tailored to your content.

• Custom CTAs to guide readers exactly where you want.

• URL import to skip the copy-paste grind.

• Multiple thread and post styles to adapt to your platform and strategy.

Why it’s different
Letterly is not a generic AI writer. It is built by a creator who struggled with newsletter growth, for creators facing the same problem. Everything is optimized for one goal: helping you repurpose your content into growth fuel faster, smarter, and without losing your voice.

Current status
Letterly is in beta, built solo from Portugal, and has already landed its first paying customers. Early adopters also get lower pricing.