Builder's Block #021: Robinhood Chain Mainnet Live on Arbitrum & Founder House London Winners

💡What's Important This Week ⚙️ Robinhood Chain Mainnet is Now Live on the Arbitrum Platform 💳 ZeroDev Launches a New Wallet 🇬🇧 Founder House London Concludes with $300K Awarded 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. Robinhood Chain Mainnet is Live The launch of Robinhood Chain enables a more

Top Founders Take Home $300K at London Founder House

New financial primitives are coming to the Arbitrum Platform. From more than 490 registrations, 140 builders were selected to join Founder House London for three days of building alongside mentors from across the Arbitrum ecosystem. By the end of the program, teams had submitted 64 projects competing for a share

Arbitrum H1 2026: The programmable economy is accelerating

The first half of 2026 ended with a landmark milestone. On July 01, the Robinhood Chain mainnet powered by Arbitrum went live, crystallising what the ecosystem has been actively building: the finance-native platform with enterprise-grade infrastructure to power the programmable economy.  As an Arbitrum chain, Robinhood Chain remits

Builder's Block #020: Final Call for Founder House London & Why Enterprises Choose Arbitrum

💡What's Important This Week 🇬🇧 Last Chance to Apply for Founder House London - Here’s What to Expect 💸 The winners that took home $85k at Open House London Buildathon ⚙️ A closer look at ArbOS 61 Elara 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. Last Chance to Apply

Builder's Block #019: Arbitrum's Product Priorities & Meet the Sponsors Backing London Founder House

💡What's Important This Week 🤖 LG Electronics is piloting an onchain advertising network on Arbitrum 💸 Meet the full sponsor lineup for Open House London ⚙️ Understand how the Arbitrum Nova transition will work 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. LG Electronics Pilots Onchain Advertising Network on Arbitrum

Arbitrum Founder House London: Apply Now to Launch Businesses Powering the Programmable Economy

Applications are now open for Founder House London, the next phase of Arbitrum's Open House global founder program. Founder House is a three-day, in-person program in London for founders building serious onchain businesses on the Arbitrum Platform. Apply Now To Founder House London Running from July

The agent economy has a verification problem

When you call a model API, you trust the provider to run the model you asked for. Not a quantized variant. Not a cheaper substitute routed in when load spikes. You can check tokens. You can diff outputs. What you cannot do is verify that the bytes flowing through the

Builder's Block #018: What's Next for AI & Open House Buildathon Schedule

💡What's Important This Week 📋 Schedule and FAQs about the Open House Online Buildathon 🛠️ Sub-second proof verification with Syndicate and Stylus 🤖 What's Next for AI: Inference verification, risks, and workshops. 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. Open House Buildathon Kicks Off - Schedule &

Builder's Block #017: $415k in Prizes at Open House London - Apply Now

💡What's Important This Week 💸 $415k in Prizes Up for Grabs at Open House London - Register Now 🤖 How to Ship x402 Agentic Payments on AWS & Arbitrum 🛠️ B3OS - The Onchain Engine for Agentic AI, Integrated with ZeroDev on Arbitrum 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. $415,

Builder's Block #016: Open House London Dates Locked & First Cohort of Mentorship Program

💡What's Important This Week 🇬🇧 London Founder House taking place July 10-12, featuring $300K in prizes and grants 📚 13 teams have been selected for Cohort 1 of the Arbitrum Mentorship Program, beginning an 8-week path to launch 🤖 Winners for the ArbiLink Agentic Bounty have been announced 📣 Announcements

Meet The Builders: The First Cohort of Arbitrum Mentorship Program

Supporting early-stage teams is critical to the growth of the programmable economy. Early decisions around infrastructure, distribution and product design shape how businesses scale and ultimately define what the next generation of onchain products looks like. That’s why the Arbitrum Foundation launched the Mentorship Program in February to

Builder's Block #015: Apply for Open House London & New Wallet Standards on Arbitrum

💡What's Important This Week 🇬🇧 Open House London Buildathon kicks off May 25th. Apply today. 📚 Arbitrum Mentorship Program Applications Closed with 900 Submissions ⚡ ERC-7715 and Open Wallet Standard are now live on Arbitrum 📣 Announcements Key updates from the Arbitrum ecosystem and Foundation. Open House London: Buildathon Applications Now