August’s hackathon calendar starts online and becomes increasingly IRL as the month progresses. The first week includes distributed AI builds across New Zealand, an online app-building sprint and a privacy-focused hackathon in Buenos Aires. August 8 is the busiest single day, with Monad Blitz running simultaneously in Jakarta and London while Rain and Monad host a separate agentic commerce hackathon in New York.
The second half moves through Aleph Week in Buenos Aires, Belgrade Blockchain Week, Web3Lagos and Cypherpunk Week in Amsterdam.
The Web3 hackathons and AI build competitions below are sorted by start date, earliest first. Application windows and capacity can change, so check the event page before making travel plans.
When: August 3–10, 2026
Format: In-person, multi-city
Where: New Zealand
The Aotearoa AI Hackathon Festival runs through a network of local events instead of placing every participant in one venue.
Hackathons are planned across Auckland, Wellington, Christchurch, Dunedin and New Plymouth, with each location hosting its own 48-hour build. Local winners move forward for a chance to pitch at the Aotearoa AI Summit in September.
The challenges focus on practical social and environmental problems, including food security, accessibility, workforce development and environmental stewardship.
Individuals can register without an existing team and connect with other participants through their local event.
When: August 3–10, 2026
Format: Online
AI Factory is a one-week online hackathon hosted by NativelyAI and lablab.ai.
Participants use native.builder to move from a prompt to a deployed AI application. The platform handles much of the development environment, making the event accessible to designers, founders and product people alongside developers and AI engineers.
The challenge is less about training a new model and more about identifying a useful workflow, turning it into a functional product and explaining who would use it.
Solo builders and teams can participate for free.
When: August 7–8, 2026
Format: In-person
Where: La Maquinita Co Innovation Lab, Palermo, Buenos Aires
Ecosystem: Midnight
Prize pool: $10,000
Hack Buenos Aires is a 48-hour Midnight hackathon focused on programmable privacy and zero-knowledge technology.
Teams are expected to build applications that can verify identity, eligibility or compliance without exposing the underlying personal information. Suggested directions include private credentials, confidential lending, regulated onchain finance and real-world assets.
The program includes an Open track for developers with previous Midnight experience and a Beginner track for builders learning Compact smart contracts and privacy-preserving application design.
Participation is free, but applications are reviewed and capacity is limited.
Monad Blitz lands in Jakarta and London on August 8.
Both stops follow the series’ compact one-day format: learn the Monad stack, form a team, build a working MVP and present it before leaving the venue.
When: August 8, 2026
Where: Jakarta, Indonesia
Prize pool: $2,000
The Jakarta route begins with a required Monad Build workshop on August 1.
The workshop covers blockchain fundamentals, Solidity, full-stack dApp development, agentic coding and deploying applications on Monad. Participants then return on August 8 for the hackathon.
Teams have one day to move from an idea to a functional prototype. The program is open to Web3 developers and Web2 builders working with technologies such as TypeScript, React, Go and Solidity.
When: August 8, 2026
Where: Encode Hub, London, United Kingdom
Prize pool: $3,000
The London stop is hosted by Encode Club and AI Builders with Monad Foundation.
The day starts with a Monad workshop before seven hours of building. Teams then submit their MVPs, pitch to the judges and compete for $3,000 in prizes.
Participants can arrive with an existing team or find collaborators at the venue. Registration is approval-based and capacity is limited.
When: August 8–9, 2026
Format: Online
Prize pool: $16,000 USDC
Supported by: Monad Foundation
Cleanverse Build gives teams 48 hours to create financial applications using verified identity and asset infrastructure.
The RWA track covers tokenization platforms, secondary markets and settlement systems with compliance built into issuance and transfers. The DeFi track focuses on products such as gated lending pools, permissioned AMMs, identity-based credit and settlement using verified assets.
Projects need to integrate Cleanverse Verified Identity or Cleanverse Verified Assets into the core product. Teams receive API access, a sandbox, sample contracts and technical support during the build.
Each track awards $5,000 for first place, $2,000 for second and $1,000 for third. Registration closes August 7, with results announced on August 14.
When: August 8–9, 2026
Format: In-person
Where: New York City, United States
Ecosystems: Rain and Monad
Raingentic Commerce explores what happens when AI agents can make decisions and complete transactions through onchain payment infrastructure.
Teams will build agentic commerce applications using Rain, with Monad available as an additional technical layer and bounty partner.
Possible directions include autonomous payments, stablecoin workflows, transaction orchestration and agents that can purchase goods or services within predefined controls.
The event is aimed at experienced engineers working across AI, fintech, payments, infrastructure and developer tooling.
When: August 22–23, 2026
Format: Hybrid, online and in-person chapters
Main location: Buenos Aires, Argentina
Aleph Hackathon returns during Aleph Week as a two-day global build sprint hosted by Crecimiento.
Teams work against the same challenges, timeline, jury and prize structure, whether they join remotely or build through an IRL chapter. The format gives local communities room to organize their own hub while remaining part of one shared global hackathon.
Developers, designers and students can form teams, build a project and present a working demo within the weekend. Previous chapters have run across Argentina, Bolivia, Peru, Ecuador, Colombia, Spain, Chile, Brazil, Costa Rica, Ghana, Kenya and Nigeria.
The hackathon closes Aleph Week in Buenos Aires, following LATAM Digital Assets Conf on August 20–21. Both events run independently within the same four-day technology program.
When: August 26–27, 2026
Format: In-person
Where: Sava Congress Center, Belgrade, Serbia
Ecosystem: Ethereum
ETH Belgrade runs its hackathon alongside the wider Ethereum conference during Belgrade Blockchain Week.
That places hackers in the same venue as protocol engineers, infrastructure teams, founders and investors attending the conference program.
Belgrade’s developer ecosystem has produced teams including Tenderly, DeFi Saver and Solflare, giving the hackathon a stronger local technical base than a standalone weekend event.
When: August 26–September 6, 2026
Format: Online
Organizer: Malaysia University Blockchain Association
MUBA Blockchain Hackathon begins on August 26 and continues into early September.
The program is positioned around blockchain development with additional room for AI, fintech and consumer applications.
Unlike the short in-person events happening later in the month, MUBA gives teams more than a week to develop and submit their projects.
When: August 27–29, 2026
Format: Hybrid
Where: Glover Memorial Hall, CMS Lagos, Nigeria
Web3Lagos includes a 24-hour hackathon inside its three-day conference program.
The wider schedule also includes technical workshops, talks and project showcases, giving participating teams access to the Web3bridge developer community and the broader Lagos ecosystem.
Web3bridge has operated developer education programs across Africa for several years, so the hackathon sits inside an existing builder pipeline instead of functioning as a one-off competition. Attendance is approval-based, including for virtual participants.
When: August 31–September 5, 2026
Format: Online build phase with an in-person finale
Where: Amsterdam, Netherlands
Common S3nse begins online on August 31 before moving into its in-person finale during Cypherpunk Week in Amsterdam.
Formerly known as ETHDam, the hackathon focuses on privacy, security, DeFi and freedom technology.
Teams build remotely during the week, then present their projects at De Hallen Studio’s on September 4–5.
Approved hackers receive access to the surrounding Common S3nse conference, where the audience includes privacy engineers, cryptographers, security researchers and protocol teams.
August is split between quick local builds and longer programs that continue into September.
Buenos Aires hosts two different Web3 hackathons within three weeks, first around Midnight and programmable privacy, then through Aleph’s distributed chapter network. Monad Blitz runs simultaneously in Jakarta and London, while Cleanverse and Rain add separate online and New York build weekends on the same dates.
AI builders can choose between a distributed festival across New Zealand and an online app-building sprint at the beginning of the month. The final stretch moves through Belgrade, Lagos and Amsterdam, with several hackathons attached to larger regional event weeks instead of operating in isolation.
Explore the full Web3 hackathons list on Web3Voyager, with filters by ecosystem, format and location. Running a hackathon, or know of one we missed? Submit it here and we will review it for the calendar.
Jul 30, 2026
NextSolana Summer Sofia Mixer runs on July 30, 2026 at Resonator in Sofia. The meetup focuses on local Solana and Web3 community networking, with...
Jul 31, 2026 - Aug 12, 2026
NextETH Lima Hackathon 2026 runs July 31–August 12 in a hybrid format. The hackathon focuses on Arbitrum projects across DeFi, AI, and Consumer &...
Aug 22, 2026 - Aug 23, 2026
NextAleph Hackathon runs August 22–23, 2026 online and through IRL chapters in different cities. Hosted by Crecimiento, the two-day hackathon connects local builder communities...
Jul 24, 2026
OverA casual Lisbon coffee morning hosted by Altitude for founders, financial operators, and community members to meet, connect, and learn about startup finance infrastructure.
