🤝
Make a deal with Bill Marczak
🔒 Paid proposals held safely in escrow — released only when the work's approved.
Followers
12K
Account age
3 yrs
💰 Suggested sponsorship rate
$67 – $109 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🎁 Free analysisfor Bill Marczak
Known for
📊 Post engagement
29
Avg engagement / post
0.2%
Engagement vs followers
Apr 2023
On Bluesky since
🔥 Top post: Update your iPhones.. again! iOS 18.3.1 out today with a fix fo · 90 likes + reposts
📊 Activity & format
Posting cadence
0.29 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly text
Recent: 9 text · 3 image · 0 video.
Follower / following
68×
Follows 177 back. A strong ratio — an audience that follows them, not a follow-for-follow network.
Recent posts
View on Bluesky ↗
Now this is (perhaps) interesting, it seems like China's MSS believes that some CN Gov folks were targeted w/ a (presumably) zero-click exploit through a "foreign" messaging app. They attribute to US NSA (though no mention of why they attr…
The video of @droethlisberger.bsky.social and my @reconmtl.bsky.social 2025 talk, "A Trip to Ancient BABYLON", is now online! It's a fun story about a 2017-era iOS persistence exploit that we found in a Pegasus sample -- on VT (!!)
WhatsApp just announced they patched a very fun zero-click bug (CVE-2025-55177)! WhatsApp assesses that it was used partially in conjunction with the iOS RawCamera DNG vulnerability (CVE-2025-43300). www.whatsapp.com/security/adv...
Excited to talk today at @reconmtl.bsky.social with @droethlisberger.bsky.social about a 2017 iOS persistence exploit used by NSO's Pegasus (and, interestingly, other threat actors too)! 10:00AM in the Grand Salon cfp.recon.cx/recon-2025/…
Remember when Meta published about an ITW FreeType OOB write vuln (CVE-2025-27363) in March? Turns out, Meta links this vuln to an exploit from spyware vendor Paragon www.securityweek.com/freetype-zer...
ICYMI, yesterday we released a report providing a first look at how we found traces of spyware on two journalists' iPhones, traces which we can attribute with high confidence to Paragon's Graphite spyware:
Check out our new @citizenlab.ca report today on Paragon! We got a tip from a collaborator, used it to map out Paragon's infrastructure, and shared with Meta. WhatsApp was able to capture & burn a zero-click, and sent out notifications to…
Nice work by Amnesty Security Lab & Google TAG patching three vulnerabilities in Android/Linux kernel USB device drivers that Cellebrite was using to unlock Android devices. Also, it's *scandalous* that Android doesn't have a USB restricte…
President Yoon arrested for masterminding martial law plot
Excellent @eff.org piece on how data brokers get ads-related data to sell (to spyware vendors, etc.) This is something that always mystified me, but after reading this I finally get it!
Rinson Jose's uncle says Jose emailed his family, claiming to be back in Norway, and with a new job.
🦋 Handle & authenticity
✅ Domain-verified
@billmarczak.org
The handle is the domain billmarczak.org. On Bluesky a domain handle proves the owner controls that website — so this is verifiably the real billmarczak.org account, not an impersonator.
On Bluesky since
Apr 2023
An early adopter from the invite-only beta (before the Feb 2024 public launch) — an original, established account.
💡 Facts
🗓️Joined Bluesky in 2023 — 3 years ago.
👁️Averages 29 views per post.
📤Posts about 0.3× per week.
🏅Earned the 10K Followers for passing 10K followers.
🕵️ Fake follower check
Estimated72/100
Good
Credibility score
94%
Real
Real audience
Low
Fake-follower risk
High
Data confidence
- Est. 94% real, active audience · Low fake-follower risk.
- Engagement (~0.2% of followers engage each post) is around typical for Bluesky.
- Organic base — far more followers than accounts it follows.
- Established account (3+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
About
senior researcher at @citizenlab.ca
📸 Gallery
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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Frequently asked questions
How much does Bill Marczak charge for a sponsorship?
Bill Marczak hasn't published fixed prices yet. Send a proposal through SocialDB and agree terms directly — your payment is held in escrow until the work is approved.
How do I contact Bill Marczak for a brand deal or collaboration?
Send a paid deal or collab request right here on SocialDB — we notify Bill Marczak, and once they accept, your payment is held safely in escrow and released when the work is approved. You don't need to track down an email.
How many followers does Bill Marczak have?
Bill Marczak has 12,032 followers on Bluesky.
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