What Is a Bank Aggregator? Plaid, Yodlee, MX, and Whether You Need One (2026)
How bank aggregators like Plaid, Yodlee, MX and Finicity connect apps to your accounts, which apps use them, how safe they are, how to disconnect them, and when you can track your net worth without one.
The Short Answer
A bank aggregator (also called an account aggregator or financial data aggregator) is a company that connects apps to your financial accounts. When a budgeting app, net worth tracker or wealth platform says “connect your accounts”, it almost never talks to your bank directly. An aggregator sits in the middle: it logs in or holds an access token for you, collects your balances, transactions and holdings, and passes them to the app.
Plaid, Yodlee, MX and Mastercard’s Finicity are the names you are most likely to meet. You have probably used one without knowing, through the “Connect your bank” screen of an app that has its own logo on top.
This guide explains how aggregation works, who the main aggregators are, which apps use them, what the real risks are, and when you don’t need one at all.
How Aggregation Works
There are two ways an aggregator gets your data.
Credential-based access (screen scraping). You type your bank username and password into the aggregator’s login screen. The aggregator stores them and logs in as you, on a schedule, to read your accounts. This is how account aggregation started, and it still covers banks that offer nothing better. Your password now lives in two places, and your bank sees a robot logging in as you.
Token-based access (APIs and open banking). You are sent to your bank’s own login page, you approve what the app may see, and the bank gives the aggregator a token with limited access. The aggregator never sees your password, and you can usually revoke access from your bank’s website. Most large banks now offer this, and many data networks were built to replace screen scraping, such as Akoya, which is owned by Fidelity, The Clearing House and a group of large US banks.
Which one you get depends mostly on your bank, and also on the aggregator the app uses and how it is integrated. The same app can use tokens for one of your accounts and stored credentials for another.
Regulation is pushing in the token direction, unevenly. In the UK and EU, open banking rules require banks to offer API access, and consent has to be renewed periodically. In the US, the CFPB finalised an open banking rule (Section 1033) in October 2024, but it has been on hold and under reconsideration since 2025, so US access still depends largely on bilateral deals between banks and aggregators.
The Main Aggregators
| Aggregator | Owner | Where it is strongest | Typical customers |
|---|---|---|---|
| Plaid | Independent | US, Canada, UK, Europe | Consumer fintech: budgeting apps, payments, investing apps |
| Yodlee | STG (bought from Envestnet in 2025) | US and international, long history | Banks, wealth platforms, financial advisors |
| MX | Independent | US | Banks, credit unions, money management apps |
| Finicity | Mastercard | US, Canada | Lending, account verification, money management apps |
| Tink | Visa | Europe | Banks and fintechs using open banking |
| TrueLayer | Independent | UK, Europe | Open banking payments and data |
| Akoya | Fidelity, The Clearing House and member banks | US | A token-only data network that aggregators and apps connect to |
Wealth managers have their own layer on top. Advisor platforms such as Morningstar’s ByAllAccounts, Addepar and Envestnet pull custodian and held-away accounts together for client reporting, often with one of the aggregators above underneath.
Which Apps Use an Aggregator?
Nearly every app that offers automatic account syncing:
- Monarch Money works with three providers (Plaid, Mastercard’s Finicity and MX), picks one per institution, and lets you switch if a connection is unreliable. Homes are valued through Zillow and cars through VinAudit.
- Empower (formerly Personal Capital), Copilot Money, Quicken Simplifi and Rocket Money are built around linked accounts.
- Kubera connects through several aggregators and also supports manual entry.
- Mint was built on account aggregation too, until Intuit shut it down in 2024. See The Best Mint Alternatives in 2026.
Apps that do not use an aggregator at all ask you to enter your holdings or import a file. TrackMyStack is one of them; more on that below.
Is a Bank Aggregator Safe?
The large aggregators are regulated, audited and heavily invested in security, and token-based connections are a real improvement over handing out passwords. “Is Plaid safe?” is a reasonable question with a reasonable answer: mostly, yes. The risks are less about a dramatic breach and more about what you are agreeing to:
- Another company holds access to your financial life. Balances, transactions, holdings and sometimes identity details sit with the aggregator as well as the app.
- Credential-based connections store your password. If your bank only supports scraping, your login is stored outside your bank. Some banks’ terms limit their liability for losses after you share credentials.
- Data travels further than the app. The aggregator’s privacy policy, not just the app’s, governs what happens to it.
- Access outlives your interest. Deleting an app does not always disconnect it. Connections can keep pulling data until you revoke them.
To see and revoke connections, check your bank’s “connected apps” or “third-party access” settings. Plaid users can also sign in to the Plaid Portal to see which apps are connected through Plaid, disconnect them, and ask Plaid to delete their data.
Why Connections Keep Breaking
If you have used a linked-account app for a while, you have seen “We couldn’t refresh this connection. Please sign in again.” The usual causes:
- Your bank changed its login page or added a multi-factor step the aggregator can’t pass.
- An open banking consent expired and needs renewing.
- The aggregator lost or changed its agreement with your bank.
- You changed your password, and the stored one stopped working.
Apps like Monarch let you switch to a different aggregator for a problem bank, which helps. Nobody has solved it entirely, because it depends on thousands of banks and a handful of middlemen agreeing at the same time.
Do You Need an Aggregator to Track Your Net Worth?
It depends on the question you want answered.
If you budget transaction by transaction, an aggregator earns its keep. Categorising hundreds of card payments a month by hand is miserable, and that is the job linked accounts do best.
If you track net worth, you mostly don’t need one. Net worth moves for two reasons: market prices, which change every day, and what you own and owe, which changes when you trade, save or pay down debt. A tracker can fetch the prices for you. The rest you can update yourself, after a trade and in a short monthly round of cash and loan balances, or import from a statement. And part of most people’s net worth can’t be linked at all, or only gets an automated estimate in some apps and countries: a defined-benefit pension, gold, a loan to family, cash at home, and in many places the house and the car. You end up entering some of it by hand whatever app you use.
Outside the US, the case for aggregation gets weaker still. Coverage drops off quickly beyond the US, Canada, the UK and parts of Europe, and multi-currency finances are where linked-account apps struggle most.
Tracking Your Net Worth Without an Aggregator
TrackMyStack is a net worth and portfolio tracker that doesn’t link to banks or brokers at all. There is no aggregator, so there is no connection to break and no bank login to store.
- You record what you own, prices update themselves. Add stocks, ETFs, funds and crypto from a market catalog covering exchanges worldwide, and their prices update automatically. Cash, property, cars, loans and anything else go in as manual holdings.
- Import instead of typing. Bring in current positions or dated buy and sell history from a CSV, Excel file, PDF or screenshot, with a review before anything is added. See the import guide.
- Multi-currency by design. Each portfolio has its own currency, and your net worth adds them up in your home currency.
- No sign-up needed to start. Your account is anonymous. An email is only needed if you want to recover it on a new device.
- iPhone, Android and the web, with home-screen widgets for your net worth.
The trade-off is honest: when you buy or sell, you update the holding yourself, and you refresh cash and loan balances when they change. For most people tracking net worth rather than budgeting, that becomes a short monthly habit. For a longer comparison of the options, see The Best Net Worth Tracker Without Linking Bank Accounts and Different Ways to Track Your Net Worth.
Frequently Asked Questions
What is a bank aggregator? A company that connects apps to your financial accounts and passes your balances, transactions and holdings to them. Plaid, Yodlee, MX and Finicity are the best-known examples.
What is the difference between Plaid and Yodlee? Both connect apps to bank accounts. Plaid is best known in consumer fintech apps in the US, Canada, the UK and Europe. Yodlee is one of the oldest aggregators and is widely used by banks, wealth platforms and financial advisors.
Is it safe to link my bank account through Plaid? Plaid is a regulated, widely used company, and token-based connections never show it your bank password. The main costs are that another company holds your financial data, and that connections keep running until you revoke them at your bank or in the Plaid Portal.
How do I disconnect an app from my bank account? Revoke it in your bank’s connected-apps or third-party access settings. For connections made through Plaid, you can also use the Plaid Portal at my.plaid.com. Deleting the app on your phone does not always cut its access.
What aggregator do wealth managers use? Advisor platforms such as Morningstar’s ByAllAccounts, Addepar and Envestnet collect custodian and held-away accounts for client reporting, often with an aggregator such as Yodlee or Plaid underneath.
Can I track my net worth without linking my bank? Yes. Apps like TrackMyStack let you record your holdings yourself or import them from a statement, and update market prices automatically. Some assets, such as gold, private loans and defined-benefit pensions, need manual entry in almost any app, and automated home and car values are only available in some apps and countries.
The Bottom Line
A bank aggregator is the plumbing behind every “connect your accounts” button. It is genuinely useful if you want every card transaction categorised for you, and the big ones are reasonably safe. It also means another company holds your financial data, connections that break, and coverage that thins out outside the US.
If what you want is your net worth, not a budget, you can skip the plumbing. Record what you own, let the prices update themselves, and keep your bank login where it belongs: with your bank.
