ghostlio vs Supergrow: same goal, different starting point
Supergrow builds your voice from posts you've already written. ghostlio builds it from what you actually think right now. One looks back. The other starts today.
7-day free trial. $39/month after trial.
The honest summary
What you actually get with each tool
ghostlio
- Captures your opinions from content you already read
- Interviews you before writing anything
- Posts grounded in what you actually think
- No LinkedIn account access required, no account risk
- No AI tells: no em dashes, no “dive in”, no generic phrasing
- Full AI access at $39/month, no credit ceiling
Supergrow
- Trains on your existing posts to match your style
- PostCast interview feature generates posts from a 10-15 minute AI conversation
- Carousel builder included
- Scheduling and analytics on Pro plan
- Analytics locked to Pro ($39/mo), absent on Starter
- PostCast capped at 2 sessions/month on Starter
- Uses LinkedIn's official API, no account risk
Pricing
What you actually pay
ghostlio
- $39/month, or $390/year (save 17%)
- 7-day free trial. $39/month after trial.
- Full AI access on every plan
Supergrow
- Starter: $19/month ($16/month annual)
- Pro: $39/month ($31/month annual)
- Teams: $139/month for 4 accounts
- 7-day free trial, no credit card required
Supergrow's Starter plan at $19/month has no analytics and only 2 PostCast sessions per month. If you want performance data and unlimited AI interviews, the real entry price is $39/month for Pro.
Comparison
Feature by feature
| Feature | ghostlio | Supergrow |
|---|---|---|
| Opinion-based post generation | Yes, core feature | No, voice trained on past posts |
| Interviews you before writing | Yes | PostCast, but trains on post history |
| Newsletter / article input | Yes | No |
| Content DNA voice capture | Yes | No, style trained on existing posts |
| AI post generation | Yes, all plans | Yes, all plans |
| Scheduling | Yes | Yes |
| AI credit limit | None | Word count limits apply |
| Carousel builder | No | Yes, Pro+ |
| LinkedIn account access needed | No | No, official API |
| Account safety | No LinkedIn access | Yes, official API |
| Platforms covered | LinkedIn only | |
| Starting price | $39/month | $19/month (no analytics) / $39/month (full) |
| Free trial | 7 days | 7 days, no card |
| Money-back guarantee | Yes | Not specified |
The core difference
Why the approach matters
Supergrow's PostCast feature is the closest thing in the market to ghostlio's approach. It conducts an AI interview, asks you questions, and generates posts from your answers. That's a genuinely good idea.
The difference is what it's trained on.
Supergrow's AI builds a voice profile from your existing LinkedIn posts. The better your past content, the better the output. If your past posts were generic, the AI learns generic. If you haven't posted much, there's little to train on.
ghostlio doesn't look at what you've written before. It asks what you think right now, about something specific you've just read. The post isn't built from your posting history. It's built from your current opinion on a current topic.
That's the difference between a tool that reflects who you were and one that captures who you actually are.
Real results
What happens when the post is actually yours
ghostlio's founder has used the tool daily since February 2026. In the first 90 days:
- LinkedIn impressions increased 1,554% compared to the previous 12 months
- Total impressions reached 209,718
- One post reached 76,051 impressions, 1,742 reactions, 138 comments, and 81 reposts, using ghostlio's Conviction Statement format
- Follower count grew by over 1,000 without any paid promotion
The highest-performing post was built from a single opinion: 17 years of experience distilled into one uncomfortable truth. ghostlio asked the right question. The answer became the post.
Testimonials
Early ghostlio users
“It worked and it worked bloody well. I've teed up a couple of weeks worth of posts, all getting back to basics on on-point messaging.”
“Your system even made me enjoy reading my own thoughts the way it collated them.”
“The interesting part is using AI as an interviewer and extractor for latent opinions people already have but never externalise.”
Who it's for
Which one is right for you?
ghostlio is right for you if:
- You want posts grounded in your current thinking, not your past posts
- You don't have a strong posting history to train on
- You want full AI access and scheduling at one price with no credit counting
- You don't need a carousel builder
Supergrow is right for you if:
- You have a solid existing post library to train from
- You want carousels built into your workflow
- You need the most complete LinkedIn-only platform at the lowest price
- Analytics and engagement tools in one place matter to you
FAQ
Common questions
Does Supergrow's PostCast work the same as ghostlio's interview approach?
They're similar in concept but different in execution. PostCast is a 10-15 minute structured interview that generates a week of posts. ghostlio asks a specific question about content you just read and generates a post from your answer. ghostlio is designed for daily use; PostCast is more of a weekly session.
Is Supergrow safe to use on LinkedIn?
Yes. Supergrow connects via LinkedIn's official API and does not use Chrome extensions or cookie-based authentication.
Supergrow is cheaper than ghostlio, why would I pay more?
The Starter plan at $19/month has no analytics and only 2 PostCast sessions per month. The Pro plan with full features is $39/month, the same as ghostlio. The difference is the approach: Supergrow mirrors your existing style, ghostlio extracts your current opinions.
Try the approach that starts with your opinion
7-day free trial. $39/month after trial.
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