I am Security researcher recognized by 400+ organizations (listed 335+ organizations and not others due to Non Disclosure) for responsibly disclosing vulnerabilities. My work spans governments, Fortune 500 companies, universities, hospitals, and critical infrastructure across 35+ countries.
The most recognized organizations in the world that have acknowledged my security research, ranked by size, revenue, and global significance.
My research focuses on vulnerabilities that have real business impact, the kind that bypass security controls and expose sensitive data.
Being the first security researcher to be inducted into a Hall of Fame means I found vulnerabilities before anyone else was looking.
From city governments to global corporations, from hospitals to universities. No ecosystem is off limits.
Screenshots, certificates, letters, and photos of swag I have received from programs around the world.
The full list of every organization that recognized me (which was allowed to be listed). Filter by type or search. Some Recognition have been intentionally categorized as Hall of Fame, due to privacy.
| Domain | Organization | Type | Country | Recognition |
|---|---|---|---|---|
| 1000minds.com | 1000minds | Company | 🇳🇿 NZ | Hall of Fame |
| 10xbanking.com | 10x Banking | Finance | 🇬🇧 GB | Hall of Fame |
| 365.bank | 365.bank | Finance | 🇸🇰 SK | Hall of Fame |
| accodeing.com | Accodeing | Company | 🇳🇱 NL | 1st HoF |
| achmea.nl | Achmea Insurance | Finance | 🇳🇱 NL | HoF & Swag |
| act.gov.au | ACT Government | Government | 🇦🇺 AU | Hall of Fame |
| adfinis.com | Adfinis | Company | 🇨🇭 CH | Hall of Fame |
| agrevolution.in | AgRevolution | Company | 🇮🇳 IN | HoF & Swag |
| airmail.news | Airmail News | Media | 🇺🇸 US | Hall of Fame |
| airmeet.com | Airmeet | Company | 🇮🇳 IN | Hall of Fame |
| aldi-sued.com | ALDI Süd | Corporation | 🇩🇪 DE | Hall of Fame |
| ama.ne.jp | AMA Japan | Company | 🇯🇵 JP | Hall of Fame |
| amdb.com.br | AMDB | Company | 🇧🇷 BR | Hall of Fame |
| amtrustgroup.com | AmTrust Financial | Finance | 🇺🇸 US | Hall of Fame |
| amtrusttitleevents.com | AmTrust Title Events | Company | 🇺🇸 US | Hall of Fame |
| anglianwater.co.uk | Anglian Water | Corporation | 🇬🇧 GB | Swag |
| appcraft.nl | AppCraft | Company | 🇳🇱 NL | Hall of Fame |
| appypie.com | Appy Pie | Company | 🇮🇳 IN | Hall of Fame |
| arkadium.com | Arkadium | Company | 🇺🇸 US | Hall of Fame |
| atswarra.com | ATS Warra | Company | 🇦🇺 AU | Hall of Fame |
| attensi.com | Attensi | Company | 🇳🇴 NO | 1st HoF |
| ag.gov.au | Attorney-General's Department | Government | 🇦🇺 AU | Hall of Fame |
| audinate.com | Audinate | Company | 🇦🇺 AU | Hall of Fame |
| afsa.gov.au | Australian Financial Security Authority | Government | 🇦🇺 AU | 1st HoF |
| aihw.gov.au | Australian Institute of Health & Welfare | Government | 🇦🇺 AU | Hall of Fame |
| apra.gov.au | Australian Prudential Regulation Authority | Government | 🇦🇺 AU | Hall of Fame |
| arc.gov.au | Australian Research Council | Government | 🇦🇺 AU | Hall of Fame |
| taxombudsman.gov.au | Australian Tax Ombudsman | Government | 🇦🇺 AU | Hall of Fame |
| avans.nl | Avans University | University | 🇳🇱 NL | Letter |
| avm99963.com | AVM99963 | Independent | 🇪🇺 EU | 1st HoF |
| bacardi55.io | Bacardi55 | Independent | 🇫🇷 FR | 1st HoF |
| bahag.com | BAHAG (Bauhaus Parent) | Corporation | 🇩🇪 DE | Hall of Fame |
| bandsintown.com | Bandsintown | Company | 🇺🇸 US | Swag |
| bankaxept.no | BankAxept (Payment System) | Finance | 🇳🇴 NO | 1st HoF |
| basf.com | BASF SE | Corporation | 🇩🇪 DE | Hall of Fame |
| bbc.com | BBC | Media | 🇬🇧 GB | HoF & Swag |
| beatport.com | Beatport | Company | 🇺🇸 US | Hall of Fame |
| belwue.de | BelWü (Academic Network) | University | 🇩🇪 DE | 1st HoF |
| beneri.se | Beneri | Company | 🇸🇪 SE | Hall of Fame |
| billiger-mietwagen.de | Billiger-Mietwagen | Company | 🇩🇪 DE | Hall of Fame |
| bitdegree.org | BitDegree | Company | 🇱🇹 LT | Hall of Fame |
| blackarrowtrading.com | Black Arrow Trading | Company | 🇺🇸 US | Hall of Fame |
| blinq.me | Blinq | Company | 🇦🇺 AU | Hall of Fame |
| bmc.com | BMC Software | Company | 🇺🇸 US | Swag |
| boeing.com | Boeing | Corporation | 🇺🇸 US | Hall of Fame |
| bokadirekt.se | Bokadirekt | Company | 🇸🇪 SE | 1st HoF |
| bournemouth.ac.uk | Bournemouth University | University | 🇬🇧 GB | Hall of Fame |
| bringme.com | Bringme | Company | 🇧🇪 BE | 1st HoF |
| byte-physics.de | Byte Physics | Company | 🇩🇪 DE | Hall of Fame |
| bytebloggerbase.com | ByteBloggerBase | Company | 🇮🇳 IN | HoF & Swag |
| cambridge.org | Cambridge University Press | University | 🇬🇧 GB | Hall of Fame |
| ccv.eu | CCV Group (Payments) | Finance | 🇳🇱 NL | Hall of Fame |
| cuni.cz | Charles University, Prague | University | 🇨🇿 CZ | Hall of Fame |
| tu-chemnitz.de | Chemnitz University of Technology | University | 🇩🇪 DE | Hall of Fame |
| chillforceltd.co.uk | Chillforce Ltd | Company | 🇬🇧 GB | Hall of Fame |
| chromatic.com | Chromatic | Company | 🇺🇸 US | Hall of Fame |
| berlin.de | City of Berlin | Government | 🇩🇪 DE | 1st HoF |
| marseille.fr | City of Marseille | Government | 🇫🇷 FR | Hall of Fame |
| ck12.org | CK-12 Foundation | Nonprofit | 🇺🇸 US | Hall of Fame |
| clayhr.com | ClayHR | Company | 🇺🇸 US | Hall of Fame |
| clear.bio | Clear | Company | 🇺🇸 US | Certificate |
| cleartax.in | ClearTax | Company | 🇮🇳 IN | Swag |
| cleeng.com | Cleeng | Company | 🇳🇱 NL | Hall of Fame |
| clinicalsupportsystems.com | Clinical Support Systems | Company | 🇺🇸 US | Hall of Fame |
| clubbrugge.be | Club Brugge KV | Sports | 🇧🇪 BE | Hall of Fame |
| cm.be | CM (Belgian Health Insurance) | Finance | 🇧🇪 BE | Hall of Fame |
| coinswitch.co | CoinSwitch | Finance | 🇮🇳 IN | Hall of Fame |
| coloop.ai | Coloop AI | Company | 🇪🇺 EU | 1st HoF |
| commerzbank.de | Commerzbank | Finance | 🇩🇪 DE | 1st HoF |
| cougarboard.com | CougarBoard | Company | 🇺🇸 US | Hall of Fame |
| cscherr.de | CSCherr | Independent | 🇩🇪 DE | 1st HoF |
| ctw.inc | CTW Inc | Company | 🇯🇵 JP | 1st HoFCertificate |
| danacita.co.id | Danacita | Company | 🇮🇩 ID | Hall of Fame |
| danielfisher.com | Daniel Fisher | Independent | 🇺🇸 US | 1st HoF |
| debijenkorf.nl | de Bijenkorf | Corporation | 🇳🇱 NL | Hall of Fame |
| homeaffairs.gov.au | Department of Home Affairs | Government | 🇦🇺 AU | Hall of Fame |
| dewr.gov.au | Dept. of Employment & Workplace Relations | Government | 🇦🇺 AU | Hall of Fame |
| industry.gov.au | Dept. of Industry, Science & Resources | Government | 🇦🇺 AU | 1st HoF |
| deutsche-boerse.com | Deutsche Börse | Finance | 🇩🇪 DE | Hall of Fame |
| dfrnt.com | DFRNT | Company | 🇸🇪 SE | Hall of Fame |
| dnsprivacy.org.uk | DNS Privacy Project | Nonprofit | 🇬🇧 GB | Hall of Fame |
| do.de | do.de (Domain Registrar) | Company | 🇩🇪 DE | Hall of Fame |
| dramatify.com | Dramatify | Company | 🇸🇪 SE | Acknowledged |
| draytek.com | DrayTek | Company | 🇹🇼 TW | Swag |
| dsb.dk | DSB (Danish State Railways) | Government | 🇩🇰 DK | Hall of Fame |
| easycrypto.com | Easy Crypto | Finance | 🇳🇿 NZ | Hall of Fame |
| easybell.de | Easybell | Company | 🇩🇪 DE | Hall of Fame |
| eerlijkdigitaalonderwijs.nl | Eerlijk Digitaal Onderwijs | University | 🇳🇱 NL | Hall of Fame |
| eiscat.se | EISCAT Scientific Association | University | 🇸🇪 SE | Swag |
| eitb.eus | EITB (Basque Public Broadcaster) | Government | 🇪🇸 ES | Hall of Fame |
| elements.nl | Elements | Company | 🇳🇱 NL | Hall of Fame |
| elfster.com | Elfster | Company | 🇺🇸 US | 1st HoF |
| ebi.ac.uk | EMBL-EBI (European Bioinformatics) | University | 🇬🇧 GB | Hall of Fame |
| empireflippers.com | Empire Flippers | Company | 🇺🇸 US | Hall of Fame |
| encre.me | Encre | Company | 🇪🇺 EU | Hall of Fame |
| escanav.com | Escanav | Company | 🇪🇺 EU | Hall of Fame |
| esign.eu | eSign | Company | 🇪🇺 EU | Hall of Fame |
| essentialenergy.com.au | Essential Energy | Corporation | 🇦🇺 AU | Hall of Fame |
| eternagame.org | Eterna (Stanford) | University | 🇺🇸 US | Hall of Fame |
| europa.eu | European Union | Government | 🇪🇺 EU | Hall of Fame |
| evolu.software | Evolu Software | Company | 🇪🇺 EU | Hall of Fame |
| evri.com | Evri (formerly Hermes) | Corporation | 🇬🇧 GB | Hall of Fame |
| exirio.com | Exirio | Company | 🇪🇺 EU | Hall of Fame |
| fagerhult.se | Fagerhult Group | Corporation | 🇸🇪 SE | Hall of Fame |
| fatora.io | Fatora | Company | 🇧🇭 BH | Hall of Fame |
| fazz.com | Fazz Financial | Finance | 🇸🇬 SG | Hall of Fame |
| felixbrezo.com | Felix Brezo | Independent | 🇪🇸 ES | 1st HoF |
| flexcom.de | Flexcom | Company | 🇩🇪 DE | Hall of Fame |
| fbk.eu | Fondazione Bruno Kessler | University | 🇮🇹 IT | Hall of Fame |
| free.law | Free Law Project | Nonprofit | 🇺🇸 US | Hall of Fame |
| freedom.nl | Freedom Internet | Company | 🇳🇱 NL | Hall of Fame |
| freelanceprojectmanager.be | Freelance PM | Company | 🇧🇪 BE | Hall of Fame |
| fundaments.nl | Fundaments | Company | 🇳🇱 NL | Hall of Fame |
| fyr.io | Fyr | Company | 🇪🇺 EU | Hall of Fame |
| gdata.de | G DATA CyberDefense | Company | 🇩🇪 DE | Swag |
| gajigesa.com | GajiGesa | Company | 🇮🇩 ID | Hall of Fame |
| gbtwente.nl | GB Twente | Company | 🇳🇱 NL | Hall of Fame |
| gea.com | GEA Group | Corporation | 🇩🇪 DE | HoF & Swag |
| getyourguide.com | GetYourGuide | Company | 🇩🇪 DE | Hall of Fame |
| gieffektivt.no | Gi Effektivt | Nonprofit | 🇳🇴 NO | 1st HoF |
| gigaprint.cz | GigaPrint | Company | 🇨🇿 CZ | Hall of Fame |
| gmx.net | GMX (United Internet) | Company | 🇩🇪 DE | Hall of Fame |
| gokoppa.com | GoKoppa | Company | 🇪🇺 EU | Hall of Fame |
| gothick.org.uk | Gothick | Independent | 🇬🇧 GB | Hall of Fame |
| wa.gov.au | Government of Western Australia | Government | 🇦🇺 AU | 1st HoF |
| hackclusive.com | Hackclusive | Company | 🇪🇺 EU | Hall of Fame |
| han.nl | HAN University of Applied Sciences | University | 🇳🇱 NL | Hall of Fame |
| handelsblattgroup.com | Handelsblatt Media Group | Media | 🇩🇪 DE | Hall of Fame |
| hanula.me | Hanula | Independent | 🇪🇺 EU | Hall of Fame |
| hebcal.com | Hebcal | Company | 🇺🇸 US | Hall of Fame |
| hetcak.nl | Het CAK (Healthcare Admin) | Government | 🇳🇱 NL | Hall of Fame |
| higlobe.com | HiGlobe | Company | 🇺🇸 US | Hall of Fame |
| hippovideo.io | Hippo Video | Company | 🇮🇳 IN | Hall of Fame |
| hs-bremen.de | Hochschule Bremen | University | 🇩🇪 DE | Hall of Fame |
| hs-harz.de | Hochschule Harz | University | 🇩🇪 DE | Hall of Fame |
| hoplr.com | Hoplr | Company | 🇧🇪 BE | Hall of Fame |
| htm.nl | HTM (The Hague Transport) | Municipality | 🇳🇱 NL | Hall of Fame |
| zonemeetjesland.be | Hulpverleningszone Meetjesland | Municipality | 🇧🇪 BE | 1st HoF |
| idealo.de | Idealo | Company | 🇩🇪 DE | Swag |
| industriutrustning.se | Industriutrustning | Company | 🇸🇪 SE | Hall of Fame |
| inflectra.com | Inflectra Corporation | Company | 🇺🇸 US | Hall of Fame |
| inovex.de | inovex | Company | 🇩🇪 DE | Hall of Fame |
| igt.gov.au | Inspector-General of Taxation | Government | 🇦🇺 AU | 1st HoF |
| instride.ch | InStride | Company | 🇨🇭 CH | Hall of Fame |
| intevation.de | Intevation | Company | 🇩🇪 DE | Hall of Fame |
| intuiface.com | Intuiface | Company | 🇫🇷 FR | Hall of Fame |
| ipaustralia.gov.au | IP Australia | Government | 🇦🇺 AU | Hall of Fame |
| irfu.se | IRFU Sweden | Sports | 🇸🇪 SE | Hall of Fame |
| isifederal.net | ISI Federal | Company | 🇺🇸 US | Hall of Fame |
| javascripttoday.com | JavaScript Today | Company | 🇺🇸 US | HoF & Swag |
| julieandjoy.fr | Julie & Joy | Company | 🇫🇷 FR | 1st HoF |
| katiethe.dev | KatieThe.Dev | Independent | 🇪🇺 EU | Hall of Fame |
| kdo.de | KDO (Municipal IT Provider) | Government | 🇩🇪 DE | Hall of Fame |
| kedalion.nl | Kedalion | Company | 🇳🇱 NL | Hall of Fame |
| kivi.nl | KIVI (Royal Engineers Society) | Nonprofit | 🇳🇱 NL | 1st HoFSwag |
| kliksafe.nl | Kliksafe | Company | 🇳🇱 NL | Hall of Fame |
| kommunicate.io | Kommunicate | Company | 🇮🇳 IN | Hall of Fame |
| lacallegroup.com | La Calle Group | Company | 🇺🇸 US | Hall of Fame |
| labelradar.com | Label Radar | Company | 🇺🇸 US | Hall of Fame |
| lain.la | Lain | Company | 🇪🇺 EU | Swag |
| landsbanki.is | Landsbanki | Finance | 🇮🇸 IS | Hall of Fame |
| leavewizard.com | LeaveWizard | Company | 🇬🇧 GB | Hall of Fame |
| lectus24.pl | Lectus24 | Company | 🇵🇱 PL | Hall of Fame |
| lumc.nl | Leiden University Medical Center | University | 🇳🇱 NL | Hall of Fame |
| lennybacon.com | LennyBacon | Independent | 🇩🇪 DE | 1st HoF |
| leuchterag.ch | Leuchter AG | Company | 🇨🇭 CH | Hall of Fame |
| lloyds.com | Lloyd's of London | Finance | 🇬🇧 GB | Hall of Fame |
| looka.com | Looka | Company | 🇨🇦 CA | Hall of Fame |
| loopcloud.com | Loopcloud | Company | 🇬🇧 GB | Hall of Fame |
| loopmasters.com | Loopmasters | Company | 🇬🇧 GB | Hall of Fame |
| lynt.cz | Lynt | Company | 🇨🇿 CZ | Hall of Fame |
| lyricsindia.net | Lyrics India | Independent | 🇮🇳 IN | Hall of Fame |
| maastrichtuniversity.nl | Maastricht University | University | 🇳🇱 NL | Certificate |
| marel.com | Marel | Corporation | 🇮🇸 IS | Hall of Fame |
| masterhackers.com | MasterHackers | Company | 🇪🇺 EU | Hall of Fame |
| matchis.nl | Matchis (Stem Cell Foundation) | Nonprofit | 🇳🇱 NL | 1st HoF |
| mbodigitaal.nl | MBO Digitaal | University | 🇳🇱 NL | 1st HoF |
| mboutrecht.nl | MBO Utrecht | University | 🇳🇱 NL | Hall of Fame |
| mediatek.com | MediaTek | Corporation | 🇹🇼 TW | Hall of Fame |
| metacode.biz | Metacode | Company | 🇪🇺 EU | 1st HoF |
| michelin.com | Michelin | Corporation | 🇫🇷 FR | Hall of Fame |
| modalku.co.id | Modalku / Funding Societies | Finance | 🇮🇩 ID | 1st HoF |
| gooisemeren.nl | Municipality of Gooise Meren | Municipality | 🇳🇱 NL | Hall of Fame |
| comune.preganziol.tv.it | Municipality of Preganziol | Municipality | 🇮🇹 IT | Hall of Fame |
| raalte.nl | Municipality of Raalte | Municipality | 🇳🇱 NL | HoF & Swag |
| sudwestfryslan.nl | Municipality of Súdwest-Fryslân | Municipality | 🇳🇱 NL | Hall of Fame |
| veere.nl | Municipality of Veere | Municipality | 🇳🇱 NL | Hall of Fame |
| westerkwartier.nl | Municipality of Westerkwartier | Municipality | 🇳🇱 NL | Hall of Fame |
| mywage.de | MyWage | Company | 🇩🇪 DE | Hall of Fame |
| fh-muenster.de | Münster Univ. of Applied Sciences | University | 🇩🇪 DE | Hall of Fame |
| narrativv.ai | Narrativv AI | Company | 🇪🇺 EU | Hall of Fame |
| ndiscommission.gov.au | NDIS Quality & Safeguards Commission | Government | 🇦🇺 AU | Hall of Fame |
| ndix.net | NDIX (Internet Exchange) | Company | 🇳🇱 NL | Hall of Fame |
| nelogica.com.br | Nelogica | Company | 🇧🇷 BR | Hall of Fame |
| neoshare.de | Neoshare | Company | 🇩🇪 DE | Certificate |
| networkapp.com | NetworkApp | Company | 🇳🇱 NL | Hall of Fame |
| nextapp.co | NextApp | Company | 🇪🇺 EU | Hall of Fame |
| nexus.org | Nexus | Nonprofit | 🇺🇸 US | Hall of Fame |
| nexxwave.be | Nexxwave | Company | 🇧🇪 BE | Hall of Fame |
| nitrado.net | Nitrado | Company | 🇩🇪 DE | Hall of Fame |
| nodasoft.com | Nodasoft / ABCP | Company | 🇷🇺 RU | Hall of Fame |
| nordnet.se | Nordnet | Finance | 🇸🇪 SE | Hall of Fame |
| norkart.no | Norkart | Company | 🇳🇴 NO | Hall of Fame |
| nhn.no | Norsk Helsenett (Health Network) | Government | 🇳🇴 NO | Hall of Fame |
| valg.no | Norwegian Directorate of Elections | Government | 🇳🇴 NO | Hall of Fame |
| notino.com | Notino | Corporation | 🇨🇿 CZ | Hall of Fame |
| ntucenterprise.sg | NTU Enterprise (Nanyang Tech) | University | 🇸🇬 SG | Hall of Fame |
| nwo.nl | NWO (Dutch Research Council) | Government | 🇳🇱 NL | HoF & Swag |
| nykaa.com | Nykaa | Corporation | 🇮🇳 IN | Certificate |
| oasen.nl | Oasen (Water Utility) | Company | 🇳🇱 NL | Hall of Fame |
| odav.de | ODAV AG | Company | 🇩🇪 DE | Hall of Fame |
| onlinetri.com | OnlineTri | Company | 🇳🇱 NL | Hall of Fame |
| oroinc.com | Oro Inc | Company | 🇺🇸 US | Hall of Fame |
| otterbox.com | OtterBox | Corporation | 🇺🇸 US | Hall of Fame |
| paddle.com | Paddle | Company | 🇬🇧 GB | Hall of Fame |
| paocloud.co.th | PAO Cloud | Company | 🇹🇭 TH | Hall of Fame |
| paretosecurity.com | Pareto Security | Company | 🇪🇺 EU | Hall of Fame |
| ppsr.gov.au | Personal Property Securities Register | Government | 🇦🇺 AU | 1st HoF |
| pirelli.com | Pirelli | Corporation | 🇮🇹 IT | Swag |
| pluginboutique.com | Plugin Boutique | Company | 🇬🇧 GB | Hall of Fame |
| plum-medien.de | Plum Medien | Company | 🇩🇪 DE | Hall of Fame |
| pmgnet.de | PMG | Company | 🇩🇪 DE | Hall of Fame |
| polarity.io | Polarity | Company | 🇺🇸 US | Hall of Fame |
| praamid.ee | Praamid Estonia | University | 🇪🇪 EE | 1st HoF |
| projectadmission.com | Project Admission | Company | 🇺🇸 US | Certificate |
| proton.me | Proton AG (ProtonMail/VPN) | Company | 🇨🇭 CH | Hall of Fame |
| publiq.be | PUBLIQ | Nonprofit | 🇧🇪 BE | Hall of Fame |
| ru.nl | Radboud University | University | 🇳🇱 NL | Hall of Fame |
| rb-media.nl | RB Media | Media | 🇳🇱 NL | Hall of Fame |
| redgames.co | Red Games | Company | 🇺🇸 US | 1st HoFSwag |
| redeia.com | Redeia (Spanish Power Grid) | Corporation | 🇪🇸 ES | Hall of Fame |
| redvilla.tech | RedVilla | Company | 🇮🇳 IN | Hall of Fame |
| register.si | Register.si (Domain Registry) | Government | 🇸🇮 SI | Acknowledged |
| rehive.com | Rehive | Company | 🇿🇦 ZA | Hall of Fame |
| rently.com | Rently | Company | 🇺🇸 US | Hall of Fame |
| resideo.com | Resideo Technologies | Corporation | 🇺🇸 US | Hall of Fame |
| resol.de | RESOL (Solar Energy) | Company | 🇩🇪 DE | Hall of Fame |
| rijkzwaan.nl | Rijk Zwaan (Global Seeds) | Corporation | 🇳🇱 NL | Swag |
| roboin.io | Roboin | Company | 🇪🇺 EU | Hall of Fame |
| rootnet.nl | Rootnet | Company | 🇳🇱 NL | Hall of Fame |
| philips.com | Royal Philips | Corporation | 🇳🇱 NL | Hall of Fame |
| safe-connect.com | Safe-Connect | Company | 🇪🇺 EU | Hall of Fame |
| sbab.se | SBAB Bank | Finance | 🇸🇪 SE | Hall of Fame |
| scoleiden.nl | SCO Leiden | University | 🇳🇱 NL | Hall of Fame |
| seantis.ch | Seantis | Company | 🇨🇭 CH | 1st HoF |
| sef.co.za | SEF | Company | 🇿🇦 ZA | Hall of Fame |
| sendpulse.com | SendPulse | Company | 🇺🇸 US | Hall of Fame |
| senzer.nl | Senzer (Public Employment) | Government | 🇳🇱 NL | Hall of Fame |
| shippit.com | Shippit | Company | 🇦🇺 AU | Hall of Fame |
| shiprocket.in | Shiprocket | Company | 🇮🇳 IN | Swag |
| shuttle.eu | Shuttle | Company | 🇪🇺 EU | Hall of Fame |
| sider.nl | Sider | Company | 🇳🇱 NL | Hall of Fame |
| sif.erda.dk | SIF/ERDA (Univ. of Copenhagen) | University | 🇩🇰 DK | 1st HoF |
| silfo.nl | Silfo | Company | 🇳🇱 NL | Hall of Fame |
| simplymadeapps.com | Simply Made Apps | Company | 🇺🇸 US | Hall of Fame |
| skipr.co | Skipr | Company | 🇧🇪 BE | Hall of Fame |
| skipso.com | Skipso | Company | 🇬🇧 GB | Hall of Fame |
| smseagle.eu | SMSEagle | Company | 🇵🇱 PL | Hall of Fame |
| snapsendsolve.com | Snap Send Solve | Company | 🇦🇺 AU | Hall of Fame |
| snel.com | Snel.com | Company | 🇳🇱 NL | Hall of Fame |
| sol1.com.au | Sol1 | Company | 🇦🇺 AU | Hall of Fame |
| sp.nl | SP (Socialist Party NL) | Political | 🇳🇱 NL | Hall of Fame |
| sparkhire.com | SparkHire | Company | 🇺🇸 US | Hall of Fame |
| stadtfabrikanten.org | Stadtfabrikanten | Nonprofit | 🇩🇪 DE | Hall of Fame |
| stickypassword.com | Sticky Password | Company | 🇨🇿 CZ | Hall of Fame |
| sutty.nl | Sutty | Company | 🇳🇱 NL | 1st HoFSwag |
| lakemedelsverket.se | Swedish Medical Products Agency | Government | 🇸🇪 SE | Hall of Fame |
| polisen.se | Swedish Police Authority | Government | 🇸🇪 SE | Swag |
| swile.co | Swile | Company | 🇫🇷 FR | Hall of Fame |
| swordhealth.com | Sword Health | Company | 🇺🇸 US | Hall of Fame |
| tabletoptournaments.net | Tabletop Tournaments | Company | 🇪🇺 EU | Hall of Fame |
| thundersquared.com | Thundersquared | Independent | 🇪🇺 EU | Hall of Fame |
| thws.de | THWS Würzburg-Schweinfurt | University | 🇩🇪 DE | 1st HoF |
| ticketcounter.nl | TicketCounter | Company | 🇳🇱 NL | 1st HoF |
| timeblndr.com | Timeblndr | Company | 🇪🇺 EU | Hall of Fame |
| tngtech.com | TNG Technology Consulting | Company | 🇩🇪 DE | Hall of Fame |
| todyl.com | Todyl | Company | 🇺🇸 US | Swag |
| touchbistro.com | TouchBistro | Company | 🇨🇦 CA | Hall of Fame |
| transfernow.net | TransferNow | Company | 🇫🇷 FR | Hall of Fame |
| tresorit.com | Tresorit | Company | 🇨🇭 CH | Hall of Fame |
| trustedshops.com | Trusted Shops | Company | 🇩🇪 DE | Hall of Fame |
| ts.ee | Port of Tallinn | Company | 🇪🇪 EE | 1st HoF |
| ts-shipping.com | TS Shipping | Company | 🇪🇺 EU | Hall of Fame |
| tu-braunschweig.de | TU Braunschweig | University | 🇩🇪 DE | Hall of Fame |
| tudelft.nl | TU Delft | University | 🇳🇱 NL | Hall of Fame |
| tv4.se | TV4 (Swedish Television) | Media | 🇸🇪 SE | Hall of Fame |
| twingate.com | Twingate | Company | 🇺🇸 US | Hall of Fame |
| tuebingen.ai | Tübingen AI Center | University | 🇩🇪 DE | Hall of Fame |
| umcutrecht.nl | UMC Utrecht | University | 🇳🇱 NL | Hall of Fame |
| unesco.org | UNESCO | Government | 🌍 INT | Hall of Fame |
| united-domains.de | United Domains | Company | 🇩🇪 DE | Hall of Fame |
| uni-muenster.de | University of Münster | University | 🇩🇪 DE | Hall of Fame |
| sheffield.ac.uk | University of Sheffield | University | 🇬🇧 GB | Hall of Fame |
| st-andrews.ac.uk | University of St Andrews | University | 🇬🇧 GB | 1st HoF |
| unistra.fr | University of Strasbourg | University | 🇫🇷 FR | Hall of Fame |
| proto.utwente.nl | University of Twente | University | 🇳🇱 NL | Hall of Fame |
| uriports.com | URIports | Company | 🇳🇱 NL | Hall of Fame |
| urldna.io | URLDna | Company | 🇪🇺 EU | Hall of Fame |
| uwv.nl | UWV (Employee Insurance Agency) | Government | 🇳🇱 NL | Hall of Fame |
| vectorcrypto.com | Vector Crypto | Company | 🇺🇸 US | Hall of Fame |
| getvero.com | Vero | Company | 🇦🇺 AU | Hall of Fame |
| vicus.nl | Vicus | Company | 🇳🇱 NL | Hall of Fame |
| videodock.com | VideoDock | Company | 🇳🇱 NL | 1st HoF |
| visma.com | Visma | Company | 🇳🇴 NO | Hall of Fame |
| volkerwessels.com | VolkerWessels | Corporation | 🇳🇱 NL | Hall of Fame |
| unihackers.com | Unihackers | Company | 🇪🇺 EU | Hall of Fame |
| we-tri.nl | We-Tri | Company | 🇳🇱 NL | Hall of Fame |
| webador.com | Webador | Company | 🇳🇱 NL | Hall of Fame |
| westburydigital.com.au | Westbury Digital | Company | 🇦🇺 AU | Hall of Fame |
| whatfix.com | Whatfix | Company | 🇮🇳 IN | 1st HoF |
| whatismybrowser.com | WhatIsMyBrowser | Company | 🇦🇺 AU | 1st HoFSwag |
| wildix.com | Wildix | Company | 🇮🇹 IT | Hall of Fame |
| windesheim.nl | Windesheim University | University | 🇳🇱 NL | Certificate |
| wiz.io | Wiz (Cloud Security) | Company | 🇺🇸 US | Hall of Fame |
| informatiebeveiligingsdienst.nl | Informatiebeveiligingsdienst (IBD) | Company | 🇳🇱 NL | Hall of Fame |
| who.int | World Health Organization | Government | 🌍 INT | Hall of Fame |
| wortell.com | Wortell | Company | 🇳🇱 NL | Swag |
| xasecase.com | Xasecase | Company | 🇪🇺 EU | Hall of Fame |
| xelion.com | Xelion | Company | 🇳🇱 NL | Hall of Fame |
| xledger.com | Xledger | Company | 🇳🇴 NO | 1st HoFSwag |
| xpd.se | XPD | Company | 🇸🇪 SE | Hall of Fame |
| yellowduck.be | Yellow Duck | Company | 🇧🇪 BE | Hall of Fame |
| zazzle.com | Zazzle | Company | 🇺🇸 US | Hall of Fame |
| zendis.de | ZenDiS — Digital Sovereignty | Government | 🇩🇪 DE | 1st HoFSwag |
| zeptonow.com | Zepto | Company | 🇮🇳 IN | 1st HoF |
| zetes.com | Zetes | Company | 🇧🇪 BE | Hall of Fame |
| zieglergroup.com | Ziegler Group | Company | 🇩🇪 DE | Hall of Fame |
| ziekenhuisamstelland.nl | Ziekenhuis Amstelland | Healthcare | 🇳🇱 NL | Hall of Fame |
| zonecollege.nl | Zone College | University | 🇳🇱 NL | Hall of Fame |
| zuyd.nl | Zuyd University | University | 🇳🇱 NL | Hall of Fame |
Available for penetration testing, red team operations, security consulting, and bug bounty program management.