Zoho Books works with a third party service provider called Yodlee - a major online banking solutions service provider. They serve millions of customers worldwide. Yodlee collaborates with several banks to provide us with bank feeds. Once you select your bank from the drop down while adding a new bank account, the account details that you are asked are sent directly to your bank.
Zoho Books does not store any of your bank login credentials.
In the background, the credentials will be used by Yodlee to gather your bank statement data. The statement data is then passed onto Zoho Books via channels using 256-bit SSL encryption for secure communications. At Zoho, we are very particular about our customer’s data security and you can rest assured that your data is protected.