Bank Aggregator: The Complete Guide 2025
Everything you need to know about bank aggregators: definition, how they work, security, and benefits for managing your finances.
What is a bank aggregator?
A bank aggregator is a technical service that connects and centralizes all your bank accounts. Companies like GoCardless, Bridge, and Budget Insight are licensed bank aggregators that connect to your banks via Open Banking (PSD2).
These aggregators automatically synchronize your transactions in real time and transmit this data to budget management apps like Trya. The result: you can view all your accounts, even from different banks, on a single interface.
Trya uses GoCardless, one of the most reliable bank aggregators in Europe, to offer you a secure connection to over 300 French and European banks.
How does a bank aggregator work?
1Secure connection to your banks
You enter your banking credentials in the app. The connection is established via a secure API regulated by the European PSD2 directive (Payment Services Directive 2).
2Automatic synchronization
The aggregator regularly retrieves (several times a day) all your banking transactions: transfers, direct debits, card payments, etc.
🔄 Real-time synchronization
Your balances and transactions are automatically updated several times a day, without any action on your part.
3Smart categorization
Thanks to artificial intelligence, each transaction is automatically classified into the right category: Groceries, Restaurants, Transport, Leisure, Savings, etc.
4Unified overview
All your accounts (checking, savings, investment, etc.) are visible on a single interface. No more juggling between multiple banking apps.
Is it secure? 🔒
Security is THE top priority for bank aggregators. Here's why you can trust them:
European PSD2 regulation
All bank aggregators in France must be licensed by the ACPR (Prudential Supervisory Authority). They comply with strict security standards imposed by the European Union.
Bank-grade encryption
Your data is encrypted using the same standards used by banks (TLS, AES-256). Your credentials are never stored in plain text.
Read-only access
The aggregator can only view your accounts, never make transactions. It is impossible to withdraw or transfer money through the aggregator.
Strong authentication
Secure connection with two-factor authentication, biometrics (Face ID, Touch ID), and temporary codes.
The benefits of a bank aggregator
Complete view of your assets
View all your accounts (multiple banks, checking, savings) in one place.
Significant time savings
No more logging into each banking app. Everything is centralized.
Automatic expense analysis
Smart categorization, charts, monthly reports to understand where your money goes.
Better budget control
Create budgets by category, track your envelopes, and receive alerts when you overspend.
Reach your goals
Set savings goals and automatically track your progress.
AI recommendations
Artificial intelligence analyzes your habits and suggests budget optimizations.
App with bank aggregator vs Traditional banking app
| Banking app | Budget app (Trya) | |
|---|---|---|
| Multiple banks | ❌ | ✓ (via GoCardless) |
| Automatic categorization | ⚠️ Basic | ✓ Advanced AI |
| Custom budget | ❌ | ✓ |
| Budget envelopes | ❌ | ✓ |
| AI analysis | ❌ | ✓ |
| Savings goals | ⚠️ Limited | ✓ Advanced |
Which banks are compatible?
Thanks to GoCardless, Trya connects to over 300 banks and financial institutions in France, including:
Frequently asked questions
Can the aggregator make transfers?
No, GoCardless and Trya operate in read-only mode. They cannot make transfers, withdraw money, or modify anything on your accounts. They only view and synchronize data.
What happens if I change my banking credentials?
You simply need to update your credentials in the Trya app. Synchronization will resume automatically.
Is my banking data sold to third parties?
No. Trya never sells your banking data to third parties. Your information is strictly confidential and used solely for the app's operation.
Is it free?
Trya offers a free version with essential features. To access the multi-account bank aggregator and advanced AI features, a Premium subscription is available starting at €5.99/month.
Connect all your banks with Trya
Thanks to GoCardless, Trya connects to over 300 banks in seconds. Enjoy a complete view of your finances with maximum security guaranteed.