Q&A: How Reah is building safer agentic commerce on Rain

Jake Margulies, Co-Founder of Reah, is focused on a problem the agentic commerce conversation often skips: how to give AI agents the freedom to move money without giving up the controls and audit trail that make it safe to deploy.

We sat down with Jake to talk about why stablecoins and agents belong in the same system, and what made Rain the right choice to power Reah’s card layer.

How would you describe what you’re building and who it’s for?

Reah is an agentic finance OS.

Most finance software today is a collection of point tools: one place for accounting, another for cards, another for payouts, another for crypto. Each one has its own rules, its own balances, its own audit log. That works when humans are the ones gluing it together. It breaks the moment you want agents — or even just teams moving fast — to operate on top of it.

An operating system flips that. Reah is a single substrate where balances, rails, policies, and audit live together — and where agents (and the people directing them) get one unified surface to take action on. Money can move programmatically across rails, with clear guardrails, all in one place.

We're building for two audiences in parallel: teams and consumers. The teams we serve include fintech operators, crypto founders, treasurers, and finance teams who need to run modern finance globally without stitching together a dozen tools. With Reah, you set policies and controls once, and agents can spend or move funds within those boundaries.

Our consumer offering is Reah for Agents, which are financial accounts for AI agents acting on a consumer's behalf within clear guardrails. Reah does not replace a bank or card, it’s the layer that enables agents to act on your behalf, within limits you set and with full visibility into what they did.

Stablecoins and agentic commerce are both having a moment. Why do the two belong in the same system rather than as separate layers?

Because if you separate them, you end up with two halves that don't share context and aren't connected in real time — which means the system can't actually do what you need it to do when you need it done.

An agent that can reason but can't act is basically a planning layer. It can tell you what to do, but it can't close the loop. And rails that can move money without any context or policy awareness will do exactly what you tell them, even when the situation changes.

When those two live in the same system, you get something different: a single source of truth where an agent can:

• Understand the goal (what we're trying to achieve)
• Check the guardrails (what's allowed)
• Take the action (move funds, issue a card, pay the bill)
• Explain what happened (so humans can audit and adjust)

That's the core thesis behind Reah: collapse analysis and execution into one place, so "decide" and "do" aren't separate products you have to integrate and maintain.

A lot of tools can analyze financial data, and a lot can move money, but very few can do both. Why has that gap stuck around, and what becomes possible when it goes away?

Historically, finance software was built in silos. You had systems that were great at records and reporting. And you had other systems that were great at movement, like cards, payouts, bank transfers, and crypto rails. The hard part is that combining them isn't just an integration problem; it's a trust and control problem.

To let a system both understand the state of money and change the state of money, you need clear, enforceable policies so actions aren't arbitrary; a strong audit trail so every action is attributable and reversible where possible; and a unified model of balances and rails so "available funds" and "where it can go" isn't ambiguous.

When you get that right, a bunch of things become possible that feel obvious in hindsight. Agents can take action in the moment, provisioning a card, paying a vendor, or handling a subscription change, without waiting for a human to translate analysis into execution. Teams can move faster without getting sloppy, because the guardrails are embedded in the system. And consumers can let agents take care of the annoying parts of money management while staying explicitly in control of every limit, every approval, and every action taken on their behalf.

It turns finance from a set of disconnected workflows into an operating system where decisions and actions are tightly coupled.

When looking to add a virtual card offering, what was most important for the Reah team in an issuing partner?

We cared about a few things that all ladder up to the same principle: if we're going to put this inside an agentic finance OS, it has to be reliable and it has to feel seamless.

The first thing was coverage and reliability. We needed confidence the rails would work well for the real-world use cases our users have. The second was the experience itself. If issuing cards and spending feels clunky, adoption suffers, and Rain's experience is smooth. And we wanted a product that matches our thesis. We're building for programmable money and automation, and Rain's foundation supports that direction.

Rain was the strongest fit for what we wanted to build. The combination of great coverage and a strong product experience lets us focus our energy on what Reah uniquely does: the operating system layer, the guardrails, and the agent-driven workflows that sit on top.

Stablecoin-funded cards are still a relatively rare primitive. How important was it to partner with a stablecoin-native card issuer?

It was important, not as a nice-to-have, but because it changes what's possible when you're designing for modern treasury and borderless spend from day one.

When an issuer is stablecoin-native instead of retrofitting crypto onto a traditional stack, you get capabilities that matter for both businesses and consumers. Settlement becomes programmable. Money movement can be treated as software, which is exactly what you want in an agentic system. Treasuries get more efficient too. Businesses can hold and deploy value with fewer handoffs, and consumers can spend from the same balance without constantly bridging between separate systems. And borderless reach becomes a default rather than something you have to engineer around. You're not constantly fighting constraints that were designed for a purely domestic, fiat-only world.

For us, this fits the broader point. We want one place where funds can be held and spent across rails, and where agents can operate within clear controls. Rain being stablecoin-native makes those primitives feel embedded rather than bolted on, which is what you need if you're building the next generation of finance workflows.

If you're building toward a future where agents can move money safely and globally, we'd love to help you get there. Let’s talk.