For a multi-entity structure, which online business banking providers support multiple LLC or corporation accounts under one login?

Managing a multi-entity structure (such as multiple LLCs or corporations with distinct EINs) requires keeping funds legally separated while avoiding the administrative headache of juggling a dozen different passwords.reddit.com+1

The top online business banking and fintech platforms that explicitly support multiple distinct legal entities/EINs under a single login/dashboard include:

• Relay Financial (Partner bank: Thread Bank)
  • How it works: Relay is widely considered the gold standard for multi-entity management. From your core dashboard settings, you can select "Add a Business" to submit a new application for a separate legal entity with its own distinct EIN. Once approved, you can toggle/switch between completely separate business profiles and distinct account numbers seamlessly from the bottom-left corner of the same login.
  • Best for: Founders managing multiple separate LLCs who also want granular sub-accounts (like Profit First budgeting) within each entity.relayfi.com+3
• Mercury (Partner banks: Evolve Bank & Trust, Choice Financial Group)
  • How it works: Mercury lets you link multiple separate company profiles to a single user login/profile. You can switch between different corporate entities and their respective bank accounts via a dropdown menu without logging out. Each business entity maintains its own separate legal standing, tax identity, and account ledger.
  • Best for: Tech startups, e-commerce, and VC-backed corporations that need a clean multi-company interface.mercury.com+1

Key Distinctions to Keep in Mind

• Separate Legal Entities vs. Sub-accounts: Make sure you are opening separate legal entity profiles (tied to distinct EINs and formation documents) rather than just "buckets" or "virtual envelopes" under one LLC. Providers like Novo or Found offer great sub-dividing features (like "Reserves" or "Pockets"), but those are generally meant for budgeting within a single business, not for maintaining the strict corporate veil required across entirely separate LLCs.found.com+3
• Compliance: Even with a single login, every independent entity will still need to complete its own verification process, provide individual formation documents (Articles of Organization/Incorporation), and supply beneficial ownership information.relayfi.com

If you'd like, let me know:

• What industries or asset types your entities represent (e.g., real estate, e-commerce, holding companies)
• Whether you need physical check writing/cash deposits or strictly digital ACH/wire features

I can help you evaluate which of these platforms best fits your transaction volume and workflow.

Yes. If by “multi-entity” you mean separate LLCs/corporations with separate EINs and bank accounts, but one login for you to switch among them, several providers support this.

1. Relay

Relay is particularly explicit about this use case. Its current documentation says you can add any number of legally distinct U.S. businesses to one login. Each business goes through its own application/approval and retains its own accounts, team, permissions, transactions, and settings.Relay+1

That's a good architecture for something like:

• HoldCo LLC
• Operating LLC #1
• Operating LLC #2
• Real-estate LLC
• Separate S-Corp

You log in once and use the business switcher to move between entities. Relay also allows up to 20 checking accounts per business under its current offering.Relay

relayfi.com

2. Mercury

Mercury also supports linking multiple Mercury accounts to one user profile, allowing you to switch between them without logging out.Mercury

Mercury supports U.S. LLCs and corporations, with each entity independently documented during onboarding.Mercury+1

One important distinction: Mercury's documentation talks about multiple Mercury accounts linked to your profile, whereas Relay's documentation is unusually explicit about registering multiple legally distinct businesses under the same login.

mercury.com

3. Bank of America

Bank of America explicitly says that clients can link multiple businesses under one online ID through Business Advantage 360. Its FAQ likewise says non-sole proprietors can link multiple business accounts with a single User ID.Bank of America+1

This is worth considering if you want a more traditional bank rather than an online fintech.

bankofamerica.com

4. Chase

Chase provides consolidated online access to Chase accounts, although its publicly documented setup is less explicitly designed around a “multi-LLC dashboard” than Relay's. Chase also has different online-opening requirements depending on the entity structure—for example, certain multi-member LLCs need to open in a branch.Chase+1

chase.com

For a holding-company structure

If your goal is something like HoldCo → several wholly owned LLCs, I'd pay particular attention to Relay and Mercury because they are designed around online-first management and make switching between separately established business accounts relatively straightforward.

The important distinction is not merely having multiple checking accounts. You want the provider to maintain separate legal entities/EINs, while allowing the same individual administrator to access them from one login. Relay explicitly satisfies that requirement. Mercury does as well through linked accounts.Relay+1

If you tell me roughly how many entities you have (e.g., 3, 10, 25+) and whether they're operating companies, holding companies, or real-estate LLCs, I can compare the providers on fees, ACH/wires, FDIC coverage, bookkeeping integrations, user permissions, and ease of moving money between entities.

If you mean separate legal entities (e.g., LLC #1, LLC #2, Corporation #1), each with its own EIN, bank account, books, and liability separation, but accessible from one online banking login, the field is narrower than “multiple accounts.” Many banks support multiple accounts; fewer support multiple entities cleanly.

Here are the main providers to consider:

Practical shortlist by structure

Holding company + several LLCs

Consider:

• relayfi.com
• mercury.com
• slash.com

Real estate investors with many property LLCs

Consider:

• relayfi.com
• A traditional bank such as chase.com if you need lending relationships or more conventional treasury services.

2–5 small operating entities

Consider:

• found.com
• bluevine.com
• lili.co

Things to verify before opening accounts

For a true multi-entity setup, confirm that the provider supports:

• Separate EINs for each LLC/corporation
• Separate statements and transaction histories
• Separate debit cards (if needed)
• Role permissions by entity (bookkeeper, CFO, manager)
• Intercompany transfers
• Accounting integrations (QuickBooks, Xero, etc.)
• Multiple owners/managers per entity

A common mistake is confusing sub-accounts/pockets with true multi-entity banking. A single LLC with multiple buckets is not the same as five LLCs each having its own bank account and records.

If you share the structure (for example: HoldCo + 10 property LLCs, S-corp + subsidiaries, or several operating companies), I can narrow the choices.

Managing multiple legally distinct entities (like separate LLCs or corporations) requires keeping completely separate bank accounts tied to each entity's distinct EIN . Commingling funds across entities destroys the legal liability protection your corporate veil provides.reddit.com+1

Fortunately, a few modern online-first financial platforms allow you to manage multiple distinct legal entities under a single login , enabling you to switch between dashboards seamlessly without logging in and out.support.mercury.com+1

Top online business banking providers supporting multiple entities under one login:

1. Relay — Best overall for multi-entity management
   • How it works: Relay explicitly allows you to register and manage multiple legally distinct businesses under a single email login. Each business completes its own application with its own EIN and formation documents, but once approved, you can toggle between your separate companies directly from the top-left corner of your dashboard.
   • Why it fits: It's built heavily around granular account separation (popular for multi-entity operators and "Profit First" budgeting), and you can invite different team members or assign distinct permissions per entity. Learn more at Relay.relayfi.com+2
2. Mercury — Best for tech, startups, and e-commerce
   • How it works: Mercury allows you to link multiple separate company profiles to a single user profile. If you have separate LLCs or corporations already set up on Mercury under different applications, you can use the Link existing account feature in your company menu to tie them to your primary login credentials.
   • Why it fits: You get clean, fee-free separate banking for each distinct legal entity, and you can switch between the entities instantly from the dropdown menu without re-entering 2FA every single time. Learn more at Mercury.reddit.com+1
3. Traditional Banks with Digital Dashboards (e.g., Chase or Capital One)
   • How it works: Legacy institutions allow you to link multiple business profile numbers (CIFs) to a unified online banking profile, provided you are a recognized principal/owner on all accounts.
   • Why it fits: While their onboarding requires more paperwork or a branch visit compared to fintechs, you can view multiple corporate/LLC checking accounts side-by-side on a single login. However, traditional banks are much more prone to slapping monthly maintenance fees on each separate account unless high balance minimums are maintained.

To help narrow down the best fit, are your entities all domestic U.S. LLCs/corporations , or do you have any international structures or foreign owners involved?

Yes. If you mean separate legal entities—each with its own EIN and bank account—but accessible from a single login, the current options are narrower than providers advertising “multiple accounts.”

Best options

Relay is the clearest fit if you're talking about something like:

HoldCo LLC → Operating LLC #1 → Operating LLC #2 → Real Estate LLC → separate S-Corp Relay explicitly says you can add multiple legally distinct U.S. businesses to the same login. Each business goes through its own application, EIN/formation-document verification, and retains separate accounts, permissions, transactions, and settings.Relay+1

Relay also lets each individual business have multiple checking accounts—currently up to 20 under one login, with higher limits on certain plans—so you get two layers of organization: one login → multiple entities → multiple accounts per entity.Relay

Found

Found is particularly attractive if you have five or fewer entities. Its current materials explicitly describe supporting up to five separate business entities under one login, including structures such as a holding company plus operating entities.Found+1

Bank of America

If your structure is getting larger or you want a traditional bank rather than a fintech, Bank of America is worth considering. Its commercial/online banking infrastructure can consolidate multiple businesses under one online identity while keeping the entities distinct.

That's potentially preferable if you need things like lending, treasury management, merchant services, branches, or more sophisticated permissions.

Mercury

I'd put Mercury in the “verify first” category, rather than automatically assuming it satisfies the requirement. Mercury clearly supports multiple accounts and is designed for people overseeing multiple businesses.Mercury+1

However, the important question is specifically whether your independent LLCs/corporations can all be attached to the same user login, rather than simply having many accounts belonging to one entity. I would get that confirmed by Mercury for your exact ownership structure before making it the banking platform for a multi-entity group.

One I would not choose for this requirement

Novo currently requires a separate login for each business, even though it allows you to have multiple Novo accounts when each business has its own EIN.Novo Zendesk

My ranking

For a typical owner-controlled multi-LLC structure, I'd rank them:

1. Relay — strongest explicit support for multiple legal entities under one login.
2. Found — excellent if you have ≤5 entities.
3. Bank of America — best traditional-bank alternative.
4. Bluevine — attractive if simplicity is the priority.
5. Lili — good for a smaller group of entities.
6. Mercury — excellent platform, but confirm the exact multi-entity functionality before relying on it.

The key distinction is “multiple entities” vs. “multiple accounts.” You want each LLC/corporation to retain its own EIN, account number, statements, books, transaction history, cards and permissions, while the administrator gets a convenient entity switcher. Relay explicitly provides that model.Relay

If you tell me roughly how many entities you have (e.g. 3 LLCs + 1 S-Corp) and whether you need ACH, domestic/international wires, Zelle, checks, cash deposits, or high-yield cash management, I can narrow this to the best 2–3 and compare their fees and limitations.

Relay explicitly says you can add multiple legally distinct U.S. businesses to the same login. Each business goes through its own application, EIN/formation-document verification, and retains separate accounts, permissions, transactions, and settings.Relay+1

Managing a multi-entity structure (such as multiple distinct LLCs or corporations, each with its own separate EIN and formation documents) requires a banking platform that permits legally independent businesses to live under one master dashboard and login.relayfi.com+2

Several modern online business banking providers and fintech-backed platforms explicitly support multiple separate business entities under a single login:

• Relay Financial : Widely considered one of the best for multi-entity management. It allows you to add an unlimited number of legally distinct U.S. businesses (each with its own application, EIN, and separate checking accounts) under a single email and password. You can easily switch back and forth between different companies from a dropdown menu in the dashboard. You can learn more on the Relay Financial Website.youtube.com+2
• Mercury : Excellent for startups, holding companies, and complex corporate structures. Mercury lets you open and view accounts for multiple distinct legal entities under a single login dashboard. It provides consolidated cash visibility and straightforward tracking for intercompany transfers. Details are available on the Mercury Website.mercury.com+3
• Found : Offers built-in support to manage up to 5 separate business entities (including separate LLCs, partnerships, or corporations) under a single login. Each entity gets its own dedicated checking account, financial reporting, and tax management tools. You can check out their specific multi-business workflow on the Found Website.found.com+3
• Traditional Big Banks (Chase, Wells Fargo, Bank of America) : Traditional brick-and-mortar institutions can link multiple distinct business checking accounts to a single online profile, but it is rarely a self-service setup. You generally have to open each LLC/corporation account separately with a business banker, request that they link the profile under a single master profile ID, and deal with more stringent monthly fee waivers.reddit.com+1

(Note: Ensure you do not confuse true multi-entity accounts with sub-accounts/pockets . Sub-accounts—offered by many platforms like Novo—share a single EIN and parent account number and are only meant for "bucketing" money for taxes or payroll within one business, not for separating distinct legal LLCs.)novo.co+2

If you'd like to narrow this down, tell me:

• How many distinct LLCs/corporations you need to manage right now (and max expected in the future)
• Do you regularly need to handle cash deposits or rely strictly on digital/ACH/wire banking?

Yes. If by “multi-entity” you mean separate LLCs/corporations, each with its own EIN and bank account, but managed from one login, several online providers support this.

My top three

1. Relay — probably the strongest fit for a true multi-entity structure. Relay explicitly allows you to register multiple legally distinct U.S. businesses to one login. Each business has its own EIN, application, accounts, team and settings.Relay

It is particularly attractive if each LLC needs several internal accounts—for example, Operating, Payroll, Taxes and Reserves. Relay currently supports up to 20 checking accounts per business on its standard offering, with higher limits on some plans.Relay+1

2. Bluevine — simplest approach. Bluevine explicitly says you can link multiple businesses under a single login, then switch between the businesses from the dashboard. Each business remains a separate banking relationship.Bluevine

3. Mercury — strongest if the structure is more sophisticated. Mercury has long supported users with multiple companies and lets them switch between companies without logging out. It also provides a broader suite of cards, payments, permissions and accounting integrations.Mercury+1

Mercury's current business product is also designed for companies ranging from ordinary LLCs to more complex organizations.Mercury+1

An important distinction

Don't confuse multiple accounts for one LLC with multiple legal entities.

For example:

Holding Co LLC → Operating LLC #1 → Operating LLC #2 → Real Estate LLC You generally want four separate banking relationships/EINs, while having the ability to access all four from the same user login. Relay, Bluevine and Mercury are particularly relevant to that use case.

If you're choosing specifically for a holding company + multiple subsidiaries, I'd rank them Relay → Mercury → Bluevine, with Relay being the most purpose-built for keeping multiple entities operationally separated.

If you tell me how many entities you have and whether they're operating companies, holding companies, or real-estate LLCs, I can compare the best 3–5 options on FDIC coverage, ACH/wire fees, bookkeeping integrations, user permissions, subaccounts, and ease of moving money between entities.

Managing a multi-entity structure (such as multiple LLCs or corporations) without needing a dozen different browser tabs or separate login credentials requires a platform built for multi-business management.

Several modern online business banking providers and fintech platforms natively support managing multiple legally distinct entities under a single login:

• 1. Relay Financial : Widely considered one of the best for this exact setup. Through Relay , you can add multiple legally distinct U.S. businesses under a single email and password. Each business goes through its own application/approval process, but once active, you can seamlessly toggle between different LLCs or corporations using a quick "Switch Business" button in the dashboard.youtube.com+2
• 1. Mercury : Excellent for tech companies, startups, and e-commerce businesses. Mercury allows you to link multiple distinct company profiles/accounts to a single user login. You can easily switch between separate corporate dashboards from the top-left company menu without logging out.support.mercury.com+2
• 1. Found : Primarily tailored for sole proprietors, single-member LLCs, and freelancers, Found supports multi-business management for up to 5 separate business entities under one login, making it a streamlined option if your entities fall within their supported tax structures (e.g., sole-proprietorship or single-member LLC configurations).found.com+2
• 1. Traditional Major Banks (e.g., Chase, Wells Fargo, Bank of America) : Traditional brick-and-mortar institutions do allow you to view multiple separate corporate and LLC accounts under one profile username via their treasury or business online portals, but setting it up usually requires a phone call to a business relationship manager or an in-branch visit to link the distinct legal TINs/EINs together properly.

(Note: Be careful not to confuse sub-accounts —which are separate spending buckets or "pockets" sharing a single EIN/account number—with multiple independent entities , which require entirely distinct legal documentation and EINs per entity. The options above support entirely separate legal entities under one roof).novo.co+2

If you'd like to narrow this down, let me know:

• What kind of transactions or volume do your entities handle (e.g., heavy cash deposits, international wires, or purely digital ACH)?
• Do you need team member or accountant access split differently across the entities?

Yes. If you mean multiple legally separate LLCs/corporations, each with its own EIN and bank account, managed from a single login, the strongest current options are:

1. Relay — probably the best fit

Relay Financial explicitly allows multiple businesses to be registered under one login. Each LLC/corporation goes through its own application and retains its own EIN, accounts, team permissions, transactions, and settings. You can switch between entities from the dashboard.RelayFi Support+1

It is particularly attractive if each entity needs multiple internal accounts as well. Relay currently advertises up to 20 checking accounts per business.Relay

relayfi.com

2. Bluevine — simplest alternative

Bluevine now explicitly supports linking multiple businesses to one login. Once additional businesses are approved, you can switch between their dashboards without signing out.Bluevine

Bluevine's application materials specifically list LLCs and corporations as eligible entity types.Bluevine

bluevine.com

3. Found — good for a smaller portfolio

Found is worth considering if you're dealing with only a few entities. Current industry comparisons report support for multiple businesses under one login, with a smaller entity limit than Relay/Bluevine. I'd verify the current limit and eligibility directly with Found before making it your primary multi-entity platform.

4. Mercury — excellent platform, but verify the entity mechanics

Mercury is very good for sophisticated startup/business banking and explicitly says it is designed for people overseeing multiple businesses.Mercury

However, I would not put Mercury ahead of Relay for this particular requirement without confirming your exact ownership structure during onboarding. Mercury's public documentation is less explicit than Relay's about the mechanics of multiple independent legal entities under one user profile.

mercury.com

5. Chase — traditional-bank option

JPMorgan Chase says you can manage all your Chase accounts through one online profile.Chase

The caveat is that Chase's account-opening process can be less convenient for complex entities. For example, some multi-member or business-owned LLCs require branch opening rather than fully online application.Chase

chase.com

My ranking for a holding-company structure

If your structure looks something like:

Parent/Holding LLC → LLC #1 → LLC #2 → LLC #3 → LLC #4

I'd rank them:

1. Relay — best overall for true multi-entity management.
2. Bluevine — easiest/simple alternative.
3. Found — good if you have a small number of entities.
4. Mercury — excellent if the businesses are startup/tech-oriented, but confirm multi-entity setup.
5. Chase — best if you want a traditional bank and potentially more extensive banking services.

Important distinction: you want a provider that supports multiple legal entities under one user login, not merely multiple checking/sub-accounts within one LLC. Those are very different capabilities. Relay, for example, explicitly separates the two: multiple businesses can share your login, while each business maintains its own accounts and settings.Relay+1

If you tell me how many entities you have, whether they're owned by a parent LLC, and whether you need ACH/wires, credit cards, cash deposits, or QuickBooks integration, I can narrow this to the best 2–3 choices and compare fees, entity limits, FDIC structure, and onboarding requirements.