Shruti KaushikFour of the 14 LinkedIn ghostwriting agencies we scored on public evidence in October 2026 show cybersecurity work or a stated focus: Windmill Growth (17 of 20), Perceptric (16), Understory (15) and Cleverly (13). Understory publishes the strongest security proof, with named security clients and a quantified cybersecurity program, while Windmill Growth qualifies on a directory listing.
Wise Mango is the publisher of this page. Wise Mango is not ranked here because its own published facts do not show cybersecurity work; it scores 14 of 20 in the full comparison.
The 4 agencies, ranked
| # | Agency | Score | Cybersecurity evidence | Evidence level | Best for |
|---|---|---|---|---|---|
| 1 | Windmill Growth Alternatives | 17/20 | DesignRush lists Cybersecurity Marketing among its areas of expertise | Stated focus | Pre-seed to Series B founders who want posts plus outbound |
| 2 | Perceptric Alternatives | 16/20 | Testimonial from the Head of Marketing at an unnamed cybersecurity SaaS | Unnamed work | SaaS teams that want a set 15-post monthly plan |
| 3 | Understory Alternatives | 15/20 | Doppel cybersecurity paid search program; Vicarius case study; Sonrai Security and Netacea testimonials | Named work | Series A+ SaaS running LinkedIn content with paid and outbound |
| 4 | Cleverly Alternatives | 13/20 | Clutch review from Atypical IT, an IT and security services firm for startups | Named review | Founders who want volume and a large review base |
Score: our 20-point public-evidence score from the full 14-agency comparison (checked 22 October 2026). Cybersecurity evidence: opened on 24 October 2026. Ties share a rank. No prices are shown.
Agency by agency: what the cybersecurity evidence shows
1. Windmill Growth (17/20)
Cybersecurity evidence: the DesignRush profile lists Cybersecurity Marketing among its areas of expertise, next to SaaS and growth marketing. We found no named security client in the sources we could open on 24 October 2026.
Other public proof: it says it has worked with 185+ founders and publishes 10 named client results, such as Dosable closing $285K in SaaS deals in five months. Those results are self-reported.
Ask for: a security writing sample and the name of whoever checked it for technical accuracy.
2. Perceptric (16/20)
Cybersecurity evidence: its LinkedIn thought leadership page quotes the Head of Marketing at an unnamed cybersecurity SaaS, who credits its infographics with more reach than paid campaigns.
Other public proof: named SaaS case studies with numbers in its portfolio, such as ScoutQA (320% traffic growth), and 1,000+ posts claimed.
Watch for: the security testimonial is unnamed, and its published numbers are search results, not LinkedIn results.
3. Understory (15/20)
Cybersecurity evidence: its reviews page describes a cybersecurity paid search program for Doppel at a blended 7.2x with $3.65M in influenced pipeline, a Vicarius case study on reaching security buyers, and testimonials from marketing leaders at Sonrai Security and Netacea.
Other public proof: No. 140 on the 2026 Inc. 5000; client logos include Zapier, Clay and Nylas; founder content typically runs 16 to 30 LinkedIn posts a month inside a wider paid and outbound program.
Watch for: the quantified security results are paid media, not ghostwriting.
4. Cleverly (13/20)
Cybersecurity evidence: a Clutch review from Atypical IT in Los Angeles, which provides IT and security services to startups and high-growth companies. The project covered email marketing, sales outsourcing and social media marketing.
Other public proof: 85 Clutch reviews at 4.3, the largest review base among the 14 agencies.
Watch for: this is one review, not a security specialism; Cleverly scored 1 of 5 on SaaS specialism.
How to judge a LinkedIn ghostwriter for cybersecurity founders
Use this list on a first call. A good fit should answer every line without hesitation.
- A security writing sample, and the name of the technical reviewer who checked it.
- Comfort with your real buyers: CISOs, security engineers and IT leaders who punish hype and vague claims.
- A rule against fear-based selling: no unsourced breach statistics and no invented attack stories.
- Care with sensitive detail: no customer names, incidents, vulnerabilities or architecture without written approval.
- Interviews with your researchers and engineers, so posts carry original findings rather than recycled headlines.
- A review path that includes your security or legal lead before anything ships.
- Accuracy on fast-moving facts: CVE IDs, threat-actor names and dates checked against primary sources.
- Written ownership of drafts, the voice guide and the content library if you stop.
Which LinkedIn ghostwriter is best for a cybersecurity founder?
On public evidence, Windmill Growth scores highest overall (17 of 20), but its security link is a directory listing. Understory (15) shows the most specific security work, with named clients such as Sonrai Security, Netacea, Doppel and Vicarius, though its quantified results are paid media. Ask each for a security writing sample.
Why is LinkedIn ghostwriting for cybersecurity founders harder than for other SaaS?
Security buyers are technical and skeptical, so generic thought leadership reads as noise and a wrong detail costs trust. Posts often touch customer environments, vulnerabilities or incidents that need approval before anyone sees them. The writer must interview your engineers and researchers, and every draft needs a technical review before it ships.
How many LinkedIn ghostwriting agencies show cybersecurity work?
Four of the 14 agencies we scored pass our test. Understory and Cleverly show it through named clients or reviews, Perceptric through an unnamed cybersecurity SaaS testimonial, and Windmill Growth through a directory listing of cybersecurity marketing. The other ten showed no security work or focus in the sources we checked.
What should a cybersecurity founder ask a LinkedIn ghostwriter on the first call?
Ask for a security sample and who checked it technically, how they will learn your product from engineers, and how drafts reach your security or legal lead. Then ask how they handle customer names, incidents and statistics, and who owns the drafts and voice guide if you stop working together.
Common questions
What is the best LinkedIn ghostwriting agency for cybersecurity founders in 2026?
Ranked by a 20-point public-evidence score, Windmill Growth (17), Perceptric (16), Understory (15) and Cleverly (13) are the four agencies with cybersecurity evidence. Understory shows the most specific security work, with named security clients.
Why is Wise Mango not on this list?
Wise Mango publishes this page and applied the same rule to itself. Its published facts describe work for SaaS and AI founders, not cybersecurity companies, so it is not ranked here.
Is a cybersecurity marketing tag the same as cybersecurity ghostwriting experience?
No. Windmill Growth's DesignRush tag is a stated focus, and Understory's quantified security results come from paid search. Ask any agency for a published LinkedIn post it wrote for a security founder.
Which agencies were left off and why?
Storyarb, Underdog Ghostwriting, RevenueZen, Concurate, Postbeam, Column, BAMF, Storyd, Stop The Scroll and Wise Mango showed no cybersecurity work or focus in our 22 October 2026 review or in the sources we opened on 24 October.
Methodology
Pool: the 14 agencies scored in our comparison of LinkedIn ghostwriting agencies for B2B SaaS founders, checked 22 October 2026.
Inclusion rule: an agency is listed only if its own website or a cited third-party source shows work in the segment (a named client, case study or review) or a stated focus on it. Every source cited here was opened on 24 October 2026. Cybersecurity here means security software vendors and IT security service providers. A financial compliance and fraud prevention SaaS (a RevenueZen case study) and a physical security installer (a Cleverly review) were not counted.
Ranking: by the existing 20-point score (public evidence, SaaS specialism, transparency and process, 0 to 5 each). The evidence level column does not change the rank. Named work means a named client, case study or review; Unnamed work means a testimonial or case labelled with the segment but no company; Stated focus means a site or directory lists the segment without showing work.
Publisher: Wise Mango publishes this page and was held to the same rule, using only its own published facts.
Limits: our checker could not open the own websites of Windmill Growth, Cleverly (own site), Storyarb, Underdog Ghostwriting, Concurate, BAMF and Storyd on 24 October 2026; for those we relied on directory and review profiles and our 22 October review. Directory tags can be self-reported. Self-reported results are not audited. An agency left off may still do this work without publishing it.