Companies

Ripple
On the RippleX team at Ripple, we champion the builders of tomorrow by providing the infrastructure, tools, services, programs and support for creation on one of the world’s fastest, most sustainable and consistently reliable public blockchain - XRPL. By supporting an open community of developers, they can advance the solutions and innovation needed to allow businesses, consumers, institutions and governments to fuel the engine of a new digital economy.
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Rippling
Rippling is a fast-growing company building a brand new zero-to-one product. Join a team of former startup founders to architect and scale a product from the ground up.
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River
River is a client-focused Bitcoin financial institution committed to empowering the long term investor. We focus on providing industry-leading security, robust financial services, and a world-class client experience to individuals and businesses looking to invest in Bitcoin.
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Riverline
Riverline is building AI agents for debt collections — think voice + WhatsApp agents that negotiate, resolve, and collect at scale. Backed by South Park Commons, DeVC, and gradCapital.
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Rivet
Rivet is an AI marketing platform that boosts D2C revenue for brand and creator teams by growing their communities and powering their direct-to-fan marketing and sales across all channels. Artists like Chance the Rapper, Major Lazer, and John Legend use Rivet to engage their fans.
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Riza
We provide isolated runtimes for executing untrusted code, mostly generated by LLMs. Our sandboxing is powered by a combination of WebAssembly, V8, and microVMs. Our customers do things like extract data from log lines at run time by asking claude-3-7-sonnet to generate a parsing function on-the-fly and then sending it to us for execution.
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Riza, Inc.
We use WASM to provide isolated runtimes for executing untrusted code, mostly generated by LLMs. Our customers do things like extract data from log lines at run time by asking claude-3-5-sonnet to generate a parsing function on-the-fly and then sending it to us for execution.
See 2 careers from Riza, Inc.

Ro
Ro is building an end-to-end healthcare platform (telehealth + labs + pharmacy) used by 2M+ patients. We’re hiring senior backend engineers who want end-to-end ownership: you’ll drive projects from problem framing → architecture → shipping incremental improvements → measurement and iteration, partnering closely with product/design/clinical.
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Roam
Roam is the TikTok for games; a game-driven social app, where every creator, artist & influencer can make unique multiplayer games for their fans in minutes with the help of AI. They work with popular IPs like Rick & Morty, Batman, Harry Potter, Lego Movie, Tom & Jerry, and over 300 content creators with a 138M+ audience reach.
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Roam
Roam is addressing housing affordability, the #1 economic issue in the US, by providing solutions for home buyers. They are launching several products to support growth, including expanding to 12 new markets and offering the ability to afford $150k more on home purchases.
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