Step 01
Describe your voice, not just your niche
FloStack looks at tone, audience overlap, cadence, and intent so introductions feel curated instead of algorithmically random.
Newsletter growth, art-directed like a print launch
The circulation desk for Substack writers who refuse bland growth loops.
FloStack pairs voice-compatible newsletters, frames the swap, and moves payouts through Stripe so audience growth feels like a warm editorial introduction instead of another generic SaaS funnel.
Start growing your Substack today
Join 50+ Substack writers already on FloStack — productivity, founder-life, and creator economy verticals.
Complementary newsletters onlyEditorial fit over category spamStripe payout built inWarm handoffs beat paid acquisition fatigue
The matchboard
A landing page that acts more like a newsroom than a dashboard.
The point is not to look like another startup selling “growth.” The point is to make the product feel like a trusted circulation system for writers with taste.
Step 02
Get a live board of complementary newsletters
Each match comes with a rationale, swap angle, payout terms, and the exact reader promise that makes the handoff convert.
Step 03
Ship the swap and clear the payout
When readers cross over, FloStack records the signal and routes the money through Stripe without back-channel spreadsheets.
Why it feels different
“FloStack should feel like the person in publishing who knows exactly who you should meet next.”
Most newsletter growth tools treat every writer the same. FloStack is built for operators who care about editorial fit — who you introduce your readers to says as much about your brand as anything you publish.
Best for
Operators, creators, and niche business writers with a sharp point of view
Avoids
Cold sponsor energy, generic lead magnets, and weird competitor swaps
Designed for
Newsletter writers who care about fit as much as list growth
Economics, not vibes
The business model reads clearly at a glance.
ChannelOld wayWith FloStack
Manual intros
Inbox threads, vague fit, no payout paper trail
One click brief, clean rationale, matched terms
Audience overlap
Usually guessed from vibes or follower counts
Evaluated by topic adjacency and reader intent
Monetization
Often unpaid, inconsistent, easy to forget
Tracked swap economics with Stripe payout baked in
Pricing desk
Pick the track that matches your intent level.
Start free and upgrade when you want automated matching and payout. No lock-in, no ad-buyer nonsense — just the right match at the right time.
Free track
FloStack Starter
Freeforever
For writers ready to start making curated introductions without committing to a paid plan yet.
- Create your newsletter profile and voice brief today
- Browse compatible newsletter matches in your niche
- Manual swap coordination with no platform fees
Paid access
FloStack Pro
$29/mo
For sharp operators who want unlimited swap briefs, faster matching, and a live payout rail without waiting around.
- Unlimited swap briefs and priority matching
- Stripe payout rail ready from the first live handoff
- A direct path into the current early-access cohort
Team favorite
FloStack Growth
$79/mo
For newsletters treating swaps as a channel and wanting the richer reporting, visibility, and support layer from day one.
- Everything in Pro plus analytics dashboard access
- Featured placement in higher-value match pools
- Dedicated support for repeatable audience growth loops
Live platform · Instant matching · Cancel anytime
Get started free
Your next 500 subscribers are already writing newsletters.
Create your free profile, get matched with complementary newsletters, and start growing your Substack through warm editorial introductions — not cold ads.