Hire an AI team to run your newsletter.
While you sleep.
Research, write, publish, distribute, and analyze — handled by AI agents trained on your voice. You write the vision. We handle the operation.
✓ Draft: 1,847 words in your voice
✓ Published: Beehiiv → 4,231 subscribers
✓ Cross-posted: X thread (8 tweets), LinkedIn, Threads
✓ Awaiting your one-tap approval for next week
Writing a newsletter is
90% operations,
10% writing.
- Researching trending topics every week
- Writing 2,000+ words in your voice
- Formatting for Substack, then again for X, then again for LinkedIn
- Tracking what worked, what didn't
- All while running your day job / business
Your AI newsletter team. One subscription. Zero setup.
Connect your voice
Paste 5 past articles. AI learns your tone, structure, vocabulary. No template, no compromise.
Pick a topic
AI scans X, HN, Reddit, RSS. Suggests this week's best angle. You approve in 30 seconds.
Sleep on it
AI writes, publishes to Substack/Beehiiv/Ghost, cross-posts to X/LinkedIn. You wake up to published content + analytics.
Publishes everywhere your readers are.
Simple pricing.
Hard caps. No surprises.
We never bill overage. When you hit your plan's article cap, generation pauses until next month or you upgrade.
- ✓All distribution channels
- ✓Voice learning
- ✓Email + Substack
- ✓Cancel anytime
- ✓Everything in Starter
- ✓X / LinkedIn cross-posts
- ✓30-day money-back guarantee
- ✓Priority support
- ✓Everything in Pro
- ✓Custom voice tuning
- ✓Advanced analytics
- ✓Multi-publication
"But couldn't I just use ChatGPT?"
Yes. For a while.
- Week one
is great. You paste your articles into ChatGPT, write a custom GPT, and crank out your first issue in two hours. You feel clever.
- Week three
you've forgotten which prompt produced the good outputs. You're maintaining a
prompts.mdon your desktop. The X thread is six tweets long but tweet four is 312 characters and ChatGPT didn't catch it. You did, at 11pm. - Week six
you're spending forty-five minutes per issue on the operational layer: prompting, validating, copy-pasting into four platforms, translating to Japanese, re-translating because the first try sounded robotic. The newsletter is decent. The workflow is killing you.
- Week ten
you stop.
QuartzMark Letters is what would have been on the other side of week six if you hadn't stopped.
We don't replace Claude. We're built on top of it. What we replace is the forty-five minutes of operational friction between you and the article you wanted to send.
30-day refund if you'd rather keep prompting.
“I built QuartzMark Letters because I run multiple businesses solo and couldn't keep up with publishing. Now I publish daily — and so can you.”
Frequently asked
Is it actually AI-written? Won't readers know?+
AI writes the first draft in your voice. You can edit, approve, or send as-is. Quality matches your past writing because the model is trained on your past work.
Do I need an Anthropic / OpenAI account?+
No. We handle all AI API access. You just pay one monthly subscription.
What if I don't have a newsletter yet?+
You can start one. We integrate with Substack, Beehiiv, Ghost — pick any and we'll publish there.
What happens if I exceed my plan limit?+
Generation stops automatically. We never bill overages. You can upgrade, buy add-on credits, or wait until next month.
Can I cancel anytime?+
Yes. Cancel in one click. Pro/Scale plans include a 30-day money-back guarantee.
Who owns the content?+
You. We never claim rights. Everything generated is yours, including the voice profile.
Is my data private?+
Yes. We use encryption for OAuth tokens. Past articles are stored ephemerally during voice profile creation, then deleted.
Who is QuartzMark?+
QuartzMark is a one-person AI-native company building a portfolio of tools for solo creators. Founded 2026.
Stop running
your newsletter.
Start writing it.
Join the waitlist. We'll email you when early access opens.