Mike Leffer @mikeleffer
President @spearbit / @cantinaxyz | Investor @ Riptide Ventures riptide.vc Baltimore, MD Joined January 2019-
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On August 25th, a @cantinaxyz researcher reported a critical vulnerability in Panoptic’s logic that could have enabled attackers to drain funds from PanopticPools by spoofing position lists. We acted to safeguard funds. All funds are safe and will be available for reclaiming…
Big news: We’re excited to welcome @cantinaxyz as the newest partner of the Ascend RWA Startup Accelerator! Together, we’re supporting the next wave of founders building institutional-grade Real-World Asset (RWA) projects.
Continuous security assessments are a core part of our commitment to transparency and trust. Huge thanks to the team at @cantinaxyz for their thorough V3 audit. Their deep dive into our vault mechanics and deployment integrity is another core step in ensuring our infrastructure…
Continuous security assessments are a core part of our commitment to transparency and trust. Huge thanks to the team at @cantinaxyz for their thorough V3 audit. Their deep dive into our vault mechanics and deployment integrity is another core step in ensuring our infrastructure…
When incidents strike, most damage happens before anyone can act. We've built a system to provide structure before a crisis - and precision if one unfolds. If you’re responsible for capital or custody, Cantina Incident Command is designed for you.
The first-of-its-kind Summit Jailbreak Hackathon, in collaboration with @googlecloud, @SonicLabs, and @DoraHacks, was a tremendous success, providing valuable insights into AI security. Here's what we learned while stress-testing @GeminiApp's capabilities.
Bounty payouts continue on Cantina: @Jiri123_eth has earned $75,000 for his latest contribution. Cantina engagements demand in-depth protocol understanding, advanced reversing, and the ability to navigate complex systems. Jiri consistently delivers across all fronts.
Cantina currently supports over $34M in active bug bounty rewards. To date, $11.2M in payouts has been distributed to top security researchers across live protocols. Details below.
Cantina has joined the @circle Alliance, standing alongside industry leaders to advance secure, scalable infrastructure for financial services and blockchain organizations. Our mission: institutional-grade security for the most important code. Link below.
The final steps before Morpho Vaults V2 launches $200k security competition now live on @cantinaxyz Learn how to take part 👇
The final steps before Morpho Vaults V2 launches $200k security competition now live on @cantinaxyz Learn how to take part 👇
So excited to announce @coinbase 's $5,000,000 bug bounty hosted only on @cantinaxyz / @spearbit !
So excited to announce @coinbase 's $5,000,000 bug bounty hosted only on @cantinaxyz / @spearbit !
Cantina paid out more in security competitions than everyone else combined in 2025. The data doesn't lie. But in scaling this, we've realized the competition model as we know it breaks under high participation. Judging times get longer, escalations exponentially increase, and…
Cantina paid out more in security competitions than everyone else combined in 2025. The data doesn't lie. But in scaling this, we've realized the competition model as we know it breaks under high participation. Judging times get longer, escalations exponentially increase, and…
So excited to see @aave (the largest DeFi protocol in the world) and @Aptos launching this impressive partnership and security initiative with @cantinaxyz !
So excited to see @aave (the largest DeFi protocol in the world) and @Aptos launching this impressive partnership and security initiative with @cantinaxyz !
Cantina Summit 2025 x.com/i/broadcasts/1…
We are excited to help onboard next $2 Trillion on chain!
We are excited to help onboard next $2 Trillion on chain!
Introducing Cantina Incident Response. When security breaks down, outcomes are determined by how quickly and clearly an organization responds. This system was built for those moments.
Cantina started small in 2023, more than 10xed our share last year, and became #1 in the category. The data is clear. No stopping until 100% 🫡
Cantina started small in 2023, more than 10xed our share last year, and became #1 in the category. The data is clear. No stopping until 100% 🫡
Startup success = moving fast and making users happy. Met with the CISO of a major customer. He asked for two features. We shipped both overnight. He’s thrilled. Speed wins. Listening wins.
A landmark moment for @ethereum security. 🪐 The $2,000,000 Pectra competition, run in collaboration with @ethereumfndn, has officially concluded. Your top-ranked researchers: 🥇 @alexfilippov314 - $342,159.94 🥈 @zigtur - $287,159.95 🥉 NDKoo - $203,733.19 Details follow.
Brandon Brooks @OfficialBBrooks
35K Followers 4K Following process automation engineer @dsqtech. founding partner of @overlookedvc .optimist. 🇺🇸 God First. adding to the frequency. Founder @lightthefirevc
pashov @pashovkrum
34K Followers 1K Following Security audits @PashovAuditGrp Angel investing @PashovCapital
Christian Seifert @cseifert
843 Followers 570 Following AI security @ Microsoft. Former researcher at Forta.
Forta 🏰 @FortaNetwork
37K Followers 582 Following Mission-critical transaction screening infrastructure ensuring compliance and security across 3+ million transactions daily
Moise @moise__
2K Followers 706 Following create things that people love 🌎🥾 @spearbitdao @dnmlikedenim @inconversationpod host
Gale Wilkinson @VITAL... @galeforceVC
57K Followers 8K Following VC, angel. Invested $80M to date. Author of a book on pet loss grief called Samson's Story. 🔮✨🐶🎨🐴 Want help / advice? Book a call with me below via Intro!
Spearbit @spearbit
14K Followers 33 Following Industry Leading Web3 Security. Request a security review here ➡ https://t.co/gqs2f17Yhd
Christopher Perkins �... @perkinscr97
9K Followers 3K Following President, @coinfund_io. @usmc veteran. Co-founder @VIDABWF, @VeteransonWS. @CFTC GMAC/DA Mkts SubCmte. Inventor. Prev: MD @Citi, Lehman. Not investment advice.
Sirocco @sir0cc
2 Followers 78 Following
RedTsunami @RedTsunamiSir
0 Followers 442 Following
True-sight Ai @TruesightAi
4 Followers 37 Following Truesight AI | Detecting deepfakes & digital lies & verifies malicious contents. AI that protects trust for people & businesses.
SetllaHume @32S3072LHcBdyX
9 Followers 666 Following
Springfield Yonga @0xspryon
35 Followers 586 Following I stare at smart contacts till one of us breaks 😳
Atharv @atharv_181
376 Followers 843 Following Smart Contract Security Researcher | Intern @PashovAuditGrp | Lead Judge @sherlockdefi | Ex-Blockchain Developer @blocktheoryhq
count-sum @_count_sum
77 Followers 610 Following Smart contract developer | Web3 security researcher | Ex-Consensys | Ex-Solana Validator
NithinKumar @0x_Scater
36 Followers 273 Following Web3 Security Researcher | Smart contract Auditor | CTF player(aka 0xscater) | Rust dev | Crypto Investor
RuthDupont @9a4LNGj2E58Qw
35 Followers 2K Following
DreyAnd @dreyand_
2K Followers 836 Following 19yo, Bug Bounty, Security Research & CTF w/@ProjectSEKAIctf
Auditor Praise 🦅 @Auditorpraise
293 Followers 409 Following Smart Contract Auditor 🦅💯 Junior Watson Dedicated Judge & Lead Judge @sherlockdefi
0xt31æ @0x_t31
17 Followers 218 Following Security researcher on the way….Scared but i’ll still do it
GrimSec @0266GrimSec
26 Followers 243 Following Web3 Security Researcher @Code4rena #Math #Solidity #EVM #DeFi
Adom Asare @AdomAsare5
0 Followers 20 Following
Veerendra Vamshi @VeerendraVamshi
266 Followers 3K Following web3 expert || Bug Bounty Hunter Read the bytecodes like bedtime stories
Syed Ghufran Hassan @SyedGhufranHas1
133 Followers 1K Following Security Researcher | Open Source Developer | 3d modeler https://t.co/6vnRxWbs2w Keen to create digital products for SMEs.
Sagar Rana @SoarinSkySagar
1K Followers 493 Following
Kemah @0xKemah
241 Followers 519 Following Smart Contract Security Researcher | Solidity 📂 Audit Portfolio ➡️ https://t.co/umF9LVCQZR
Audinarey @Audinarey
385 Followers 457 Following Smart Contract Security Researcher. Reach out for a smart contract security review
Pane @Pane6440162
11 Followers 1K Following
Prince Of Both Kingdo... @RealOsas001
1K Followers 5K Following CHRIST✝️||Politics||Big Business Builder||ARSENAL||Feb 12th||DOMAINS||https://t.co/W3tIHtAhVB
0xkujen @_kujen5
118 Followers 740 Following Senior Penetration Tester at Intrinsic-Security | C-ADPENXv2 | CRTE | CRTP | CARTP Personal Blog: https://t.co/JhE466wzJz
Vaibhav Hawale @vshawale90
160 Followers 1K Following Full Stack Web Developer | Security Researcher | Web 3 Enthusiastic
0xOwain @0xOwain
30 Followers 114 Following CS Graduate 🎓 | Web3 Security Researcher | https://t.co/ouHlgKGPhj
Reba💸 @rttsietso
347 Followers 605 Following Smart Contract Security Reseacher 🔍 | Co-host of Let's Talk It Through 🎙️ | Philippians 4:6
0x4lifemen @4lifemen
119 Followers 501 Following 🌐 Web3 security researcher 🧑🏻💻 Learning Solidity and Rust 🦀 Check out my web3 security journey: https://t.co/QD3wbKtbl1
Kelker @Kelkersnr
210 Followers 1K Following | Aspiring smart contract dev/Security researcher | Student @CyfrinUpdraft
Chukwuka @0bChuks
215 Followers 372 Following cs • math • Software engineer • Security researcher • co-founder @halflifedotfun
Gintoki Sakata @samuraiigintoki
37 Followers 212 Following "I audit smart contracts, but I charge in parfaits 🍨 and strawberry milk 🥤"
Mathriel @mathrielx
13 Followers 356 Following Securing Web2 today, building Web3 trust tomorrow On a mission to transition into blockchain & decentralized security
@jason @Jason
1.0M Followers 6K Following first investor in https://t.co/M6cblbFld9 Host: @twistartups @theallinpod; I also invest in 100 startups a year @launch & @founderuni [email protected] for life
Alexis Ohanian 🗽 @alexisohanian
580K Followers 8K Following Legacy @SevenSevenSix ♻️ @776Foundation Owner 🦁 @ChelseaFCW 🏃🏿♀️@athlos ⛳ @weareLAGC ⚽️ @weareangelcity Prev. @Initialized @Reddit 💪 Business Dad
Austen Allred @Austen
418K Followers 1K Following Founder https://t.co/m6TigM4CJT: Free AI training for the smartest engineers in the world. Will tweet as I wish and suffer the consequences.
Brandon Brooks @OfficialBBrooks
35K Followers 4K Following process automation engineer @dsqtech. founding partner of @overlookedvc .optimist. 🇺🇸 God First. adding to the frequency. Founder @lightthefirevc
Lolita Taub @lolitataub
90K Followers 842 Following Latina VC @ganasvc | $100K pre-seed/seed checks | 100+ startups backed | AI + community-led | Ganas Global Tour 🌍
Turner Novak 🍌🧢 @TurnerNovak
190K Followers 3K Following Investing @BananaCap_ Podcasting @ThePeelPod
VCs Congratulating Th... @VCBrags
273K Followers 4K Following They're adding value™ And they're very proud of it. @BragsVentures
Mudit Gupta @Mudit__Gupta
69K Followers 1K Following CTO @0xPolygon Labs | Intern @deq_fi | Blockchain Security Researcher | Ethereum & Web3 dev | Advisor & Angel Investor 🦇🔊
Ryan Selkis (d/acc) �... @Selkis_2028
379K Followers 2K Following I am @Solomon_2028 | American Supremacist & Girardian | OFFENSE
Garry Tan @garrytan
602K Followers 5K Following President & CEO @ycombinator —Founder @Initialized—designer/engineer who helps founders—San Francisco Dem accelerating the boom loop—e/acc—technology brother
pashov @pashovkrum
34K Followers 1K Following Security audits @PashovAuditGrp Angel investing @PashovCapital
Hayden Adams 🦄 @haydenzadams
317K Followers 623 Following Inventor of the Uniswap protocol, CEO @Uniswap Labs
Forta 🏰 @FortaNetwork
37K Followers 582 Following Mission-critical transaction screening infrastructure ensuring compliance and security across 3+ million transactions daily
DCinvestor @iamDCinvestor
271K Followers 701 Following fan of crypto, ethereum, NFTs, AI, AR/VR. posts not expert opinions or advice. https://t.co/Aq5wHkGNui + https://t.co/8RngRZ4nT3
Tal Be'ery @TalBeerySec
10K Followers 2K Following Security Research Manager. Co-Founder, CTO @ZenGo. Advisor @ZeroNetworks. x-VP Research Aorato, acq by @Microsoft. 9 times @BlackHatEvents speaker.
Gale Wilkinson @VITAL... @galeforceVC
57K Followers 8K Following VC, angel. Invested $80M to date. Author of a book on pet loss grief called Samson's Story. 🔮✨🐶🎨🐴 Want help / advice? Book a call with me below via Intro!
Spearbit @spearbit
14K Followers 33 Following Industry Leading Web3 Security. Request a security review here ➡ https://t.co/gqs2f17Yhd
Harry Stebbings @HarryStebbings
294K Followers 364 Following 🎤 @twentyminutevc, 🏦 @20vcfund, @projecteurope_😇 @perplexity_ai @linear @fyxerai @tripledotgames @lovable_dev @airwallex @mercor_ai @getcaptionsapp
samczsun @samczsun
154K Followers 209 Following founder @_SEAL_Org, security @tempo. art by @Keiseeaaa/@vincywp
Patrick OShaughnessy @patrick_oshag
290K Followers 2K Following building @psumvc @joincolossus hosting @investlikebest
Chris Koerner @mhp_guy
135K Followers 1K Following Owns 8 RV parks w/ investors + 7 companies. DFW & LDS. Get my favorite 250 biz ideas for 2025, with tactical launch plans included: https://t.co/VH2ZSGrmzT
Tatiana Dascalescu @TatianaDas95919
485 Followers 227 Following Keeping the Security Researchers happy @cantinaxyz @SpearbitDAO DM to learn how you can join the Cantina Fellowship Team!
Lift Blog @liftblog
25K Followers 546 Following Covering the world of ski lifts, tramways and gondolas from Jackson Hole and beyond. 750 ski areas and counting.
code2042 @code2042
373 Followers 269 Following Co-Founder @dc11331 • Head of Operational Security @ Euler Finance • Penetration Tester • Hacker • Linux Kernel Developer
HackerOne @Hacker0x01
324K Followers 3K Following The only official HackerOne Twitter account. A global leader in offensive security solutions. #HackForGood #togetherwehitharder
bugcrowd @Bugcrowd
187K Followers 6K Following The leading provider of crowdsourced cybersecurity solutions purpose-built to secure the digitally connected world...Unleash Ingenuity™
Ricky Tan @rkstan
647 Followers 546 Following Head of BD & Strategy @NexusMutual 🐢 | Founder @TokenData
mtndao 🗻 @mtndao
16K Followers 146 Following The world-class, action packed startup experience. v8 summit: Aug 1-31, 2025. Salt Lake City, UT, USA 📍🇺🇸
Jamison Hensley @jamisonhensley
81K Followers 1K Following ESPN Ravens reporter and WBAL Radio contributor. 🐢⚒️ ✉️: [email protected]. Alum: @baltimoresun, @thedbk
Jeff Zrebiec @jeffzrebiec
105K Followers 501 Following Senior staff writer for The Athletic-Baltimore; covering the Ravens
noah.eth @NoahMarconi
2K Followers 1K Following researcher & dev Head of Security at Monad Foundation @monad Former Lead Security Researcher / Spearbit Core Team @SpearbitDAO.
0xdeniz.eth @0xdeniz
821 Followers 1K Following tech lead for @SkyEcosystem (fka MakerDAO) // crypto optimist // class of '17 💙
Alice Henshaw @hensha256
3K Followers 470 Following protocol eng @Uniswap, previously breaking code @OpenZeppelin
Zach Light 🛡️ @ZachLight16
6K Followers 512 Following $GOOG 2005-2023 $TSLA 2014-2021 $ETH since 2017 $COIN since 2022. Crypto and stocks investor.
eric.eth @econoar
192K Followers 340 Following Ethereum and Cryptopunks OG | ETH is money | Co-Author EIP-1559 | @freysa_ai
Colleen Collins @C0Collins
1 Followers 21 Following
winnie @xuwinniexu
4K Followers 568 Following 2024🥇@code4rena ✨Elite All Star @Immunefi 🍉watermelon lover 🎃The other persona @ATREEBLOS
Corey Petty @Corpetty
4K Followers 1K Following Founder of @hashingitoutpod, head of "insights" at @instituteFT, comp chem physics phd. I am focused on building asshole-resistant technology. I also garden.
Maggie Hsu @meigga
8K Followers 7K Following Partner @a16zcrypto; @goldhouseco, @global_GWS & @mochimag | fmr: @zappos; @airswap
Matthew Green is on B... @matthew_d_green
150K Followers 1K Following I teach cryptography at Johns Hopkins. Mostly on BlueSky these days at https://t.co/GI4QlxZr2S.
Andrew McClure @andrewjmcclure
227 Followers 1K Following Cybersecurity VC @ForgepointCap Defending the Digital World | #Marine Veteran | Senior Fellow @MasonNatSec | SV-based, FL native. Swimming upstream
Spearbit JSR @Spearbit_Intern
485 Followers 29 Following Spearbit's number one AI Agent DM for autist
Ian Rapoport @RapSheet
4.9M Followers 818 Following National Insider for NFL Network and https://t.co/NIVZ6FPz0E. Husband of @thebanktress. Made seven cameos in the movie Draft Day.
qiuhao @QiuhaoLi
846 Followers 610 Following
Jason @jsn_yrty
175 Followers 378 Following Multilingual hacker, synesthete. Perpetual student of expertise development, memory, & learning. Addicted to reading real books.
Brennan Fife (brennan... @brennandoteth
420 Followers 272 Following build, run, draw (then repeat) | dev @spearbitdao @cantinaxyz
Andrew McCalip @andrewmccalip
69K Followers 1K Following Building spacecraft @vardaspace. Circumnavigating world @ https://t.co/hLM2DEHrnx. Art @ https://t.co/Cze338MBMi Former: Co-Founder Cosine Additive, acquired by GE
Pete Cooling @PeteCooling
693 Followers 950 Following Led Prod @Visa Crypto. Open source wallets, digital id at Linux @OpenWalletFdn. Building new networked tribe of tinkerers. Practical dreamer, NFA/Trust Yourself
Cantina 🪐 @cantinaxyz
17K Followers 2 Following Securing the world's most important code alongside @spearbit. Explore our security solutions @ https://t.co/UGMSesXryV
Omar @acceleratooooor
10K Followers 4K Following securing @monad | grew @Spearbit @Cantinaxyz + eng @Coinbase
Spencer Macdonald �... @SpencerMac101
2K Followers 873 Following "It is not down on any map; true places never are."
Molly White @molly0xFFF
123K Followers 2K Following crypto & tech industry researcher & critic at https://t.co/hb1tT2Q3bJ & @web3isgreat • software engineer • wikipedian support my work: https://t.co/FPG3uvikH0
Jason Levin @iamjasonlevin
39K Followers 2K Following Founder https://t.co/7sHPtc9jvm. I build software for meme marketing and memetic warfare. Running for mayor https://t.co/FMYSQ9BGD0
Lily @lobstermindset
4K Followers 515 Following casually inhaling crypto whitepapers while transcending into glitter 🤍✨👾 head of protocol @clankeronbase, prev @astriaorg, @thelatestindefi and @meta
OSINTdefender @sentdefender
1.5M Followers 1K Following Open Source Intelligence Monitor focused on Europe and Conflicts across the World. RT ≠ Endorsement. Want to Support my Work? https://t.co/PcUbewvWPr
The Oracle @oracle_xyz
4K Followers 0 Following 🔮web3 deal coverage + analysis, 2 tweets at a time | media arm of @antithesis_xyz | not investment advice👇
Sam Blond @samdblond
17K Followers 544 Following Co-Founder / CEO at Stealth. Fmr partner @foundersfund. Fmr CRO @brexhq
Jake Chapman 🇺🇸... @vc
23K Followers 2K Following Working at the nexus of national security & VC. Father to a superhero. Lets live forever and travel the stars ✨ Partner @marque_vc & Adjunct @randcorporationTrends for United States
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