The Arbitrum Foundation has completed the first full cohort of its Mentorship Program, an eight-week, equity-free accelerator aimed at early-stage teams preparing to launch onchain products. The Foundation said participating companies collectively raised more than $1 million during the program, while 10 of the 13 selected teams advanced to a final Demo Day after an application process that drew 902 submissions.
The selection rate was roughly 1.4%, with teams spanning tokenization, DeFi infrastructure, payments, consumer applications and agentic finance. Seven of the 13 had either previously built outside Arbitrum or were still in pre-deployment when selected, suggesting the program was designed partly to attract new builders into the ecosystem rather than simply accelerate existing Arbitrum projects.
Fundraising and Launches Become the First Measurable Outcomes
The first month concentrated on investment readiness, including fundraising strategy, tokenomics, partnerships, positioning and go-to-market planning. The second shifted toward technical clinics, product execution and direct work with the Arbitrum Foundation and Offchain Labs before Demo Day. Founders also received recurring one-on-one access to mentors, ecosystem teams and investors rather than relying solely on group workshops.
Capital formation was one of the clearest outcomes. Arbitrum says cohort companies raised more than $1 million after the program began, while teams also progressed from testing toward live products and infrastructure. Five participants launched on either Robinhood Chain testnet or mainnet, and others shipped products on Arbitrum One. The results provide evidence of fundraising and product execution, although they do not yet establish sustained user adoption or commercial viability.
Robinhood independently confirmed that its Chain public mainnet launched on July 1 using the Arbitrum Platform. That timing meant teams completing the accelerator could deploy into an operational network rather than waiting exclusively for a future production environment. Robinhood Chain therefore became another live distribution surface for builders emerging from the Arbitrum program.
Demo Day Puts Ten Teams in Front of Investors
Cohort One concluded with Demo Day on July 7, when 10 teams presented to more than 25 venture capital firms and ecosystem partners. Arbitrum’s recap lists more than 40 investor introductions in its headline metrics and later says the final number exceeded 60 before Demo Day. Regardless of that internal discrepancy, investor access was a central component of the accelerator rather than an activity reserved for the closing event.
Carbon, LayerV, T3tris and Capa ultimately divided a $100,000 non-dilutive prize pool. Their businesses span derivatives, market infrastructure, asset-management tooling and payments, while two of the four winners are building on Robinhood Chain. The awards added grant capital without requiring the Foundation to take equity in the participating companies.
The first cohort now moves from accelerator metrics toward harder operational tests. Arbitrum said it will continue helping participants with launches, fundraising and ecosystem connections, while a second cohort is planned. The more durable measure of the program will be whether the capital raised and products shipped during eight weeks translate into functioning businesses, recurring users and sustained activity on Arbitrum-based networks.