Creator portfolio infrastructure
Your whole world. One thread.
Hub · AI magnets · Attribution — everything the creator tools you use today can't do.
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Alex Rivera
Indie game dev · newsletter writer
I make strange, quiet games. Currently: The Memory Cat. Also writing about the business of being small and doing things slowly.
The Memory Cat
Live ↗A puzzle game about remembering.
Slow Commerce
Newsletter2,400 readers. One email / week.
Get notified when The Memory Cat drops
From Alex. Unsubscribe anytime. White-label available on Collective.
Voice-matched capture copy
Every creator. Their words. Their CTA.
Meditative · strange · personal
“
Paste your project description. Seamline writes CTAs, headlines, email sequences, and social posts — in your voice, in seconds.
Generate my first magnet freeNo account required to start.
One thread · every creator category
Live preview
This is what your hub looks like.
Pick a creator type and a theme. See a real hub at seamline.now/@yourhandle
Alex Rivera
Indie game dev · newsletter writer
@alexrivera
I make strange, quiet games about memory, loss, and the objects that outlive us. Currently: The Memory Cat. Also writing Slow Commerce — a newsletter about building sustainably.
Projects
The Memory Cat
Live ↗A puzzle game about remembering what the world forgot. 3 hours. Meditative.
847 wishlists
Slow Commerce
NewsletterWeekly dispatch on building a one-person game studio sustainably.
2,400 readers
Get notified when The Memory Cat drops
From Alex. White-label available on Collective. Unsubscribe anytime.
AI voice score
94
/100
Measures how closely the AI output matches this creator’s natural voice.
Capture proof
1,240 total captures
Every subscriber traced to its source — platform, post, and moment.
Active theme
Seamline Dark
Theme applies to your public hub. Change it anytime in Settings → Hub Theme.
What Seamline generates
No card to start. Custom domains on paid plans.
Copy that sounds like you wrote it.
Paste your project description. Seamline's AI — powered by Claude — generates three headline variants, landing page copy, a 5-email welcome sequence, and six social posts. All in your voice. No prompting required. No generic SaaS templates. The output sounds like you, because the input was written by you.
No other portfolio tool does this. Linktree and Beacons have no AI copy generation.
Magnet generated
Voice score: 91/100 ✓
Emails written
5
Social posts
6
Voice match
91%
Know exactly what's working.
Every subscriber is traced to the exact link, platform, and moment that captured them. When a Twitter thread drives 31 signups and a Reddit comment drives 2, you know — and you know why. End-to-end attribution, not just click counts. Source → click → capture → email-open, in one dashboard.
End-to-end attribution. From the tweet to the subscriber to the first open.
Attribution Dashboard · Last 30 days
412 clicks · 7.5% conversion
203 clicks · 3.9% conversion
89 clicks · 3.4% conversion
Total this month
42 captures · 704 clicks
Your list. Your domain. Always.
Your welcome sequences go from your authenticated sender domain on paid plans — never from a Seamline marketing list. Only creator-authored project content and creator-approved voice settings are used for AI. Subscriber emails, names, and identifying lead data never go to AI. No hidden unsubscribe. No dark patterns. No platform lock. If you ever leave, your list goes with you.
Creator-owned relationships. Zero platform dependency. Your data stays yours.
Data flow — always transparent
Your project description → Claude AI
Only creator-authored project content and creator-approved voice settings are used for AI. Subscriber emails, names, and identifying lead data never go to AI.
Your subscriber email → Your verified sender domain
Email dispatch uses your configured sender on paid plans; Seamline is infrastructure, not the list owner.
Subscriber list → Stays with you — export anytime
We never aggregate, sell, or model on your subscriber data.
Email sequences
Your subscribers receive this —
from you, not Seamline.
Claude writes a 5-email welcome sequence in your voice. Emails send from your authenticated Brevo sender domain — never from a Seamline address. Every subscriber knows exactly who they signed up with.
Email 1 — Delivered immediately
From
Alex Rivera <alex@yourdomain.com>
Subject
You're in — here's what happens next
Email 3 — Day 4
From
Alex Rivera <alex@yourdomain.com>
Subject
The weird room that almost didn't make it in
Email 5 — Day 12
From
Alex Rivera <alex@yourdomain.com>
Subject
What I'm building next (and why it scares me)
Email 1
Day 0
Email 2
Day 2
Email 3
Day 4
Email 4
Day 7
Email 5
Day 12
Showing 3 of 5 emails · all generated in your voice · delivered from your sender domain.
From early-access creators
What changes when you have the whole thread.
Attribution changed everything.
“
I spent 3 years on link-in-bio tools that just listed my stuff. Seamline actually explains why people should care about my work — and tracks who does.
Game developer · newsletter writer
Early-access creator · Spark plan
Voice-matched in 4 minutes.
“
The AI wrote my welcome sequence in 4 minutes. I edited maybe 8 words. It sounds more like me than most things I actually write myself.
Solo SaaS founder
Early-access creator · Studio plan
31 subscribers from one post.
“
Knowing that my Reddit post drove 31 subscribers and my Twitter thread drove 2 changed how I spend my time completely.
Open-source builder · newsletter writer
Early-access creator · Spark plan
What we believe
Trust infrastructure, not growth hacks.
Linktree aggregates. Beacons monetizes. Seamline builds the relationship layer that belongs to you — not to us.
Your list.
Not ours. Not the platform's. If you leave Seamline tomorrow, every subscriber goes with you.
Your voice.
The AI reads your words and writes in your register. We don't homogenize. We amplify.
Your domain.
Every email comes from your sender address. Seamline is never the visible brand. You are.
Your data.
Subscriber emails never enter the AI. Capture data is yours — downloadable, portable, private.
| Differentiator | Seamline | Linktree | Beacons |
|---|---|---|---|
| AI copy in your voice | |||
| End-to-end attribution | Partial | ||
| Voice DNA — persistent voice profile |
Pricing
Start free. Grow when you’re ready.
The Free plan gives you a live hub, lead capture, and one AI magnet per month. Paid plans add more capacity and advanced intelligence.
Free
Free forever
- 3 projects
- 1 AI magnet / mo
- Seamline @handle URL
- Seamline branding shown
Studio
$29/mo
- 50 projects
- 25 AI magnets / mo
- Custom domain
- Seamline branding shown
See full pricing, feature matrix, and competitor comparison →
Frequently asked questions
What is Seamline?
Is Seamline free to use?
Who owns my subscriber list on Seamline?
How is Seamline different from Linktree?
How does the AI voice feature work?
What integrations does Seamline support?
Can AI agents access Seamline creator profiles?
How do I export my subscriber list from Seamline?
Get started in 15 minutes
Four steps to your first subscriber.
No designer, no developer, no course needed. Just your projects and a place to collect your audience.
Create your hub
Sign up free and set your handle at seamline.now. Your hub goes live at seamline.now/@yourhandle within seconds — no credit card required.
Install the capture widget
Copy the one-line embed and paste it on any website, blog, or landing page. Subscribers captured anywhere appear in your Seamline dashboard with full attribution.
Generate your first AI lead magnet
Paste your project description. Seamline generates headlines, landing copy, a 5-email welcome sequence, and social posts in your voice — ready in under 15 seconds.
Share your thread link
Post seamline.now/@yourhandle wherever you promote yourself. Every click is attribution-tracked — you see exactly which source drove each subscriber.
Your thread starts here.
One hub. Everything you’ve made. An audience that follows you — not the platform, not the algorithm, not the link.
No card to start. No dark patterns. White-label available on Collective.