Publish to Substack like a native.
Write and schedule your Substack posts and Notes alongside the rest of your stack, then publish straight from the FoPost browser extension while you stay logged into Substack. Your account and credentials never leave your browser.
Substack
Newsletter writers and creators building an audience on Substack.
Draft in FoPost, publish to Substack in one click.
Connect Substack
One OAuth click. Native API, no scraping.
Compose with preview
See the post the way Substack will render it.
Schedule or post now
Pick a time or ship immediately. The queue handles retries.
Watch the numbers
Engagement, impressions, replies. Hourly refresh.
What you can publish
- Long-form posts
- Notes (short-form)
- Title & subtitle
- Markdown body
- Cover image
Platform limits
- Delivery
- Via the FoPost browser extension
- Format
- Title, subtitle, Markdown body
- Account access
- Stays in your browser, never on our servers
Substack on FoPost
Everything you need to publish Substack content at scale, without compromising the native features that make Substack work.
Long-form + Notes
Draft full newsletter posts and short Notes from the same composer.
Extension-assisted publish
The FoPost extension hands your draft to Substack, you click publish.
No credentials shared
We never ask for your Substack password and never store your session.
Scheduling reminders
FoPost reminds you the moment a scheduled Substack post is ready to ship.
AI repurposing
Turn one essay into a Substack post plus social posts in a single pass.
Cross-post
Mirror your newsletter to X, LinkedIn, and your blog, same minute.
Who uses FoPost for Substack?
Newsletter writers
Draft and plan issues in FoPost, publish to Substack when ready.
Cross-channel launches
Ship the same essay to Substack, your blog, and socials together.
Repurposing
Spin long-form Substack posts into threads and Notes automatically.
How FoPost connects
Publishes through the free FoPost browser extension while you are logged into Substack. No password, API key, or session is ever sent to FoPost. Substack has no official publishing API, so this assisted flow is the safe, terms-friendly way to ship.
Connect Substack in under a minute.
7-day free trial. Every platform unlocked from day one.