Rho vs Brex

Rho doesn’t have “every ACH debit needs your explicit approval” workflows, so it works more like a traditional bank. Once you share your routing/account number, ACH debits can hit your account and you manage risk through monitoring yourself, and disputes rather than pull approvals.

On the contrary, Rho uses a huge sweep network (400+ banks) to offer up to $75 million in FDIC insurance per entity. Your money is split into chunks of up to $250K and parked across many FDIC‑insured banks.

Despite the large FDIC coverage, Rho itself was last publicly valued at around $1.5B in its Series C round and they're likely not yet profitable.

Rho Treasury requires a $350K minimum to even unlock it, which is a bit of a bottle neck for most early business owners (unless you've raised funds).

Once you have access, you can set up auto-transfer rules (called "auto-sweeps"). They work between checking and Treasury to maintain your cash flow. You can set a minimum checking balance (e.g., $50K operating float) and top-up amount (min $25K).

Rho Treasury also gives you the option to keep some cash in a same day liquid pool while putting the majority into a higher-yield option that takes 2–3 business days to pull back, letting you get better returns without fully sacrificing cash flow.

While Rho handles payments well, it's more of a "finance team tool" rather than a "delightful minimalist banking solution like Mercury for example.

Rho lets you forward invoices into a dedicated Bill Pay inbox, where it scans invoices and create draft bills so you're not hand-entering everything. From there, you can send invoices for approvals so invoices can be reviewed before you make payment. You can also make payments in bulk (batch approving a bunch of invoices) to help streamline workflows.

It handles vendor management, where you can store profiles, and payment methods in one place.

It streamlines W-9 collection and 1099 filing workflows automatically, which is helpful for high-contractor teams.

With Rho you initiate the payment, and it handles printing and mailing the physical check along with any attachments. This is especially useful for vendors (or landlords) who still insist on paper.

Domestic and International wires to a USD account are free.

Rho allows you to create and send invoices, but it's user experience is not as "delightful" as Mercury.

Rho lets you create multiple operating accounts (checking sub‑accounts) so you can organize cash for things like payroll, taxes, and other expenses.

Rho does not support "Profit First" style banking.

You can have a rule that says "transfer $5K each month to this account" but you cannot have rules like "take 10% of all deposits into this account and spread it to these 10 sub‑accounts" the way Mercury or Relay's auto-transfer rules can do percentage of balance/percentage of incoming funds across multiple destinations.

So if this type of banking is important to you, skip Rho as you'll need to do it manually.

If you run multiple businesses, you can associate multiple business entities with a single Rho user login and easily switch between them.

That said, Rho does not offer any Personal Banking solutions so you'd still need a totally separate bank for that (we are obsessed with Mercury Personal Banking, which is why we use Mercury for both business + personal, but hey, even if you use Rho for business we'd recommend switching to Mercury for personal use!).

Rho gives you granular control over who can see what and who can move money.

There are six pre‑set roles: Account Owner, Administrator, Department Owner, Employee, Bookkeeper, and Investor each with its own permission bundle.

Rho has a full payment approval framework that lets you define when transactions need sign‑off, how many people must approve, and which specific users are allowed to approve.

You can create rules like "for X dollar amount or above, require Y approvals," and assign one or more approvers. For example, you might require one approver for payments over $1k and two approvers for payments over $10k.

Rho has a good user experience for finance teams, but if you're a business owner or founder you'll find the interface feels a lot more dense than something like Mercury.

With Brex Vault, deposits can receive up to $6M in FDIC insurance through it's network of partner banks, and you can set basic controls around incoming ACH debits to reduce the risk of unauthorized transfers.

That said, the overall setup of it all feels more like it was tacked on to check a box, that is banking, versus them actually trying to innovate and set a new standard in the space.

The biggest concern right now is that there's quite a bit of long-term uncertainty here around Brex because they were acquired by Capital One, which could eventually lead to the product being folded into Capital One's more outdated banking stack. In-fact, many startup founders and business owners we know have moved off Brex since this announcement.

So while Brex is technically safe and secure as a platform, it doesn't feel quite as focused or purpose-built around the core banking experience as Mercury, and there's a lot of uncertainty around it right now especially.

Brex lets you earn some yield on idle cash, but the setup is fairly basic. Funds are placed into a government money market fund (DGVXX), and you can move money between checking and treasury without too much friction.

The main downside is that Brex essentially gives you one default fund rather than a broader treasury options like Mercury allows for. Which also makes sense, because unlike Mercury, Brex is less of a banking solution, so this it more bolted on functionality just to check the box in this area, versus innovating on the experience.

Brex can move money, but the whole experience feels like banking was added as an afterthought.

Yes, you can send and receive ACH, wires, and checks. You can onboard vendors through a secure link, collect W-9s, upload invoices into bill pay, and add approval flows. So on paper, there's a decent amount of functionality.

The problem is that once you actually start using it, the whole thing feels bolted on. To us, it feels much more like an expense management platform that added banking later, rather than a banking product that was built from the ground up to make transferring funds seamless. Even the way Brex frames it as a "cash management account" instead of a bank account kinda gives that away.

While Brex has native invoices, payment links, ACH/wire payments, and even ACH direct debit, it just feels unpolished an unintuitive. Compared to Mercury, it just feels old.

Not to mention, if you're using one of the newer AI accounting tools, the limitations become even more obvious. For us, that was a complete deal breaker. We use Kick, and it integrates directly with Ramp (virtual cards) and Mercury (banking), but not Brex. So unless you're cool with not exploring the world of AI accounting tools, I'd say you're better off skipping Brex.

Brex is more focused on finance‑team‑heavy companies rather than small teams.

Brex actually goes very far on the "many accounts" front: if you're approved for a Brex business account (you need a $50k bank minimum, or $1 million in revenue), you can create up to 240 separate checking accounts under one EIN, each with its own account and routing number so you can separate cash for things like payables, receivables, payroll, and tax.

But you don't get a card for each account like you would with a bank. Since Brex is an expense management software, you just spend on cards and they are all tied to one "entity" where payments come from.

Admins can set "auto‑transfer rules" per checking account, like "always keep this account at $100K" but you are unable to set auto-transfer rules like "every time money lands, automatically slice 30% tax, 20% for payroll, etc to different buckets."

All of your Brex business accounts banking (checking, treasury, vault) are tied to a single primary legal entity, and deposits must be in that primary entity's name.

If you want a completely separate Brex business account for another legal entity, you have to apply again and run it as a separate account, rather than just adding another full banking "workspace" under one login the way Mercury and Ramp allow for multiple entities.

There is no Brex personal banking solution so you can't manage your personal finances under one login (we are obsessed with Mercury Personal Banking, which is why we use Mercury for both business + personal).

Brex is very strong on roles and permissions: you get Account admins (full banking + payments), Card admins, Finance admins, plus more limited roles like Employee, Reimbursement‑only, and Auditor, and on top of that you can create granular custom roles that decide exactly who can "manage accounts & payments" versus just view data.

For each Brex checking account, you can toggle on payment approvals, set a minimum amount that requires approval, and choose one or more users who must approve any outbound payment or transfer above that threshold.

There's a lot of functionality, but it still feels more pieced together than purpose-built.

Brex's interface is fine, but the banking UX just doesn't feel like the main product.

It's relatively modern, and you can usually get to what you need without fighting with it, but once you're actually trying to do banking things, it feels like you're navigating a platform that was built for spend/expense management first, with banking being added in as an afterthought.

The biggest friction is that your cash experience is split across checking, treasury, and vault, so even simple questions like "where's our money?" can require some digging. And while search generally helps, it doesn't fix the constant underlying feeling that the banking interface is more of a secondary layer.

All-in-all, it just doesn't feel like a bank that obsessed over making money movement and visibility of your cash super easy, unlike dedicated banking apps like Mercury.