Martin Kalfatovic✓ Add us as a preferred source on Google
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Followers
217
Account age
3 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🎁 Free analysisfor Martin Kalfatovic
Known for
9 views
“IMMARKUS” presentation from - @hildedeweerdt & @aboutgeo at the @IIIF Showcase #IIIF / Learn more about IMMARKUS here https://github.com/rsimon/immarkus/wiki
8 views
Jules Schoonman and Bert Spaan presenting on #Allmaps and #IIIF at the @IIIF Showcase in Amsterdam / learn more about the IIIF/Allmaps Partnership here: https://allmaps.org/iiif-partnership/
7 views
Caitlin Perry, @IIIF Communications and Community Coordinator giving an overview of IIIF Showcase featuring a key Dutch player, Nijntje (aka Miffy) with Bugs Bunny #IIIF
4 views
“Slow looking in the Imaginarium with Micrio” - Erwin Verbruggen & Marcel Duin, Q42 IIIF Showcase #IIIF“Slow looking in the Imaginarium with Micrio” - Erwin Verbruggen & Marcel Duin, Q42 at the @IIIF Showcase #IIIF / learn more about Q42 at https://www.q42.nl/
📊 Post engagement
Recent posts · likes + reposts
Jun 1latest
4
Avg engagement / post
3–7
Typical post (engagement)
1.8%
Engagement vs followers
71/100
Consistent reach
Nov 2022
On Mastodon since
Half of recent posts land between 3 and 7 likes + reposts (median 4) — a dependable floor a sponsored post can count on.
🔥 Top post: “IMMARKUS” presentation from - @hildedeweerdt & @aboutgeo at · 9 likes + reposts
📊 Activity & format
Posting cadence
1.7 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly images
Recent: 0 text · 12 image · 0 video.
Follower / following
0.6×
Follows 373 back. A more reciprocal / networked account.
Recent posts
View on Mastodon ↗
🔥 Top post
“IMMARKUS” presentation from - @hildedeweerdt & @aboutgeo at the @IIIF Showcase #IIIF / Learn more about IMMARKUS here https://github.com/rsimon/immarkus/wiki
Good to see @mia (even if virtual) for the Library of Congress "AI Literacy & Learning" summit #AI4LAM
A quick summary and thanks for a great 2026 @IIIF Annual Conference and Showcase in the Netherlands https://www.linkedin.com/posts/martinkalfatovic_thanks-to-all-the-presenters-and-attendees-ugcPost-7469723544634150912-Hmt9/?utm_source=sh…
Special thanks to the sponsors of the 2026 IIIF Annual Conference: Kakadu Software (Platinum), 4Science (Welcome Drinks), digirati (Gold), OCLC (Scholarship Sponsor), Cogapp (Silver), Micr.io Powered by Q42 (Silver), From the Page (Silver…
We had a great reception last night at @Naturalis for all 2026 all @IIIF Conference attendees; thanks to Kakadu Software (https://kakadusoftware.com/) for their Platinum Sponsorship of the event #IIIF
Attendees of the 2026 @IIIF Conference taking a break and testing their geographic knowledge using the Allmaps Arcade #IIIF / Learn more about Allmaps at https://allmaps.org/
Thanks to Geertrui Verbraak from the @kbnationalebibliotheek for an inspiring opening talk at the 2026 @IIIF Annual Conference at Scheltema #IIIF
“From Silos to Synergy: IIIF as the Next Step for Museum Image Collections” - Rob Jacobs, Axiell #WoodWing #IIIF at the @IIIF Showcase
“Slow looking in the Imaginarium with Micrio” - Erwin Verbruggen & Marcel Duin, Q42 IIIF Showcase #IIIF“Slow looking in the Imaginarium with Micrio” - Erwin Verbruggen & Marcel Duin, Q42 at the @IIIF Showcase #IIIF / learn more about Q42 …
“Rijksmuseum & Change Discovery” Kelly Davis, Daan de Schepper and Minh Tran from the @Rijksmuseum at the @IIIF Showcase #iiif
Jules Schoonman and Bert Spaan presenting on #Allmaps and #IIIF at the @IIIF Showcase in Amsterdam / learn more about the IIIF/Allmaps Partnership here: https://allmaps.org/iiif-partnership/
Caitlin Perry, @IIIF Communications and Community Coordinator giving an overview of IIIF Showcase featuring a key Dutch player, Nijntje (aka Miffy) with Bugs Bunny #IIIF
🐘 Community & instance
Home server
mas.to
A large general-interest Mastodon server. On the fediverse the server a creator picks hints at their community — this one spans all topics.
✅ Link-verified
Verified link
Proved ownership of a website linked on their profile — Mastodon's green-check verification, a real identity signal rather than a paid badge.
On Mastodon since
Nov 2022
Joined in the Twitter-exodus wave of late 2022 — part of the migration that made Mastodon a real destination.
💡 Facts
🗓️Joined Mastodon in 2022 — 3 years ago.
👁️Averages 4 views per post.
📤Posts about 1.7× per week.
🕵️ Fake follower check
Estimated75/100
Good
Credibility score
92%
Real
Real audience
Low
Fake-follower risk
High
Data confidence
- Est. 92% real, active audience · Low fake-follower risk.
- Engagement (~1.8% of followers engage each post) is around typical for Mastodon.
- Verified account.
- Established account (3+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
💚 Brand affinity
EstimatedBrands Martin Kalfatovic's audience is most likely to respond to — from detected sponsorships in this niche.
About
Managing Director for @IIIF / Nature: http://inaturalist.org/people/udcmrk | Professional Profile: https://www.udcmrk.org/ | Random thoughts here: https://www.udc793.org/ | opinions are mine (he/him)
📸 Gallery
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
ijenkins99
34%
chicating
17%
Carola Wolff
17%
Joachim :verified:
16%
Ingo Sauer
15%
Thomas :rubberduck:
12%
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Frequently asked questions
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How many followers does Martin Kalfatovic have?
Martin Kalfatovic has 217 followers on Mastodon.
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