Rho vs Mercury: Which startup bank fits your stage?

Pre-seed and bootstrapped: often Mercury, sometimes Rho

If you are two founders with a modest balance, no finance hire, and simple needs, Mercury's free tier covers core banking with no monthly fee. The product is self-serve, and 1.5% cashback on the IO card is competitive at this stage. Pick Mercury if you value a purely self-serve experience and do not expect to need a human on the phone.

Pick Rho at this stage if you are already holding $100K or more in idle cash (Rho Treasury's minimum is $100K, less than half of Mercury Treasury's $250K; mercury.com/treasury, as of 08/20/2026), or if you want phone access to support from day one.

Series A and beyond: Rho

Once you have a team submitting expenses, an accountant closing the books, and a real cash balance, the comparison shifts. Mercury places recurring invoicing behind Plus ($35/mo) and NetSuite categorizations behind Pro ($350/mo), while Rho includes AP, expense management, and ERP integrations without a software fee. Rho also offers phone and chat support with a human on every account. This is the stage where most switching happens.

Multi-entity holding companies: lean Rho, verify your specifics

Both platforms can hold multiple businesses under one login: Rho supports switching between organizations and entities on one platform (rho.co, as of 08/17/2026), and Mercury supports managing multiple businesses under one login (mercury.com/pricing, as of 08/17/2026). Consolidation is one of the most common reasons operators give for choosing Rho, but the right answer depends on how many entities you run and what per-entity controls you need. Demo both with your actual entity structure before deciding.

Treasury-heavy operations: Rho

Two structural differences matter for companies parking significant cash. First, minimums: Rho Treasury opens at $100K while Mercury Treasury requires $250K, so balances between $100K and $250K can earn treasury yield at Rho but not at Mercury. Second, deposit insurance ceilings: Rho savings is eligible for up to $75M in FDIC coverage per depositor through American Deposit Management Co. and its partner banks, versus up to $5M at Mercury through its partner banks' sweep networks. Treasury investments at either provider are securities, not deposits, and are not FDIC insured. Compare current rates directly at rho.co/treasury and mercury.com, since both change.

Rho: pros and cons

Pros

• No monthly software fees or paid tiers at any company size

• Up to 2% cashback with Rho Platinum (terms apply); 1.5% standard on Daily Terms

• Treasury access from $100K; savings with up to $75M in FDIC coverage per depositor via American Deposit Management Co. and its partner banks, subject to FDIC requirements

• Human support by phone and chat on every account

• AP automation, expense management, and NetSuite, QuickBooks, and Sage Intacct integrations included

• Account application takes less than 10 minutes

Cons

• Savings yield (up to 1.00%, variable) is modest; higher yield requires the $100K Treasury minimum

• Checking FDIC coverage is the standard $250K; the $75M figure applies to savings only

Mercury: pros and cons

Pros

• Free tier covers core banking with no monthly fee

• Fully self-serve product and onboarding

• 1.5% cashback on the IO card with no annual fee

• Free bill pay on all tiers

• Up to $5M FDIC insurance through partner bank sweep networks

Cons

• Recurring invoicing requires Plus ($35/mo); NetSuite categorizations require Pro ($350/mo), and a dedicated relationship manager requires Pro or a $10M+ balance on any tier

• Mercury Treasury requires a $250K minimum balance and carries a monthly fee of 0.15% to 0.60% on balances

• Reimbursing out-of-pocket expenses for more than 5 active users per month requires a paid plan, starting at $35/mo (mercury.com/pricing, as of 08/17/2026)

• No phone support option appears on Mercury's pricing page; support is advertised as 24/7 online with a 5-minute typical response (mercury.com, as of 08/17/2026)