Mercury

Overview

Mercury provides banking services specifically developed for startups, small businesses, and venture-backed companies. Founded in 2017, it aims to simplify financial operations for technology-driven businesses by offering core banking products such as checking and savings accounts, credit cards, and treasury management solutions. The platform is notable for its emphasis on digital-first operations and integration capabilities, which are designed to support the financial needs of companies that prioritize efficiency and automation.

For most core banking services, Mercury operates on a no-monthly-fee model, making it accessible for early-stage companies. Fees apply for specialized services such as venture debt, specific wire transfer volumes, or advanced treasury management products. The service offers a developer API, enabling programmatic access to account data and transactions, which can be used to automate financial reporting, reconcile transactions, and integrate with other business intelligence tools. This API functionality positions Mercury as a banking partner for companies that require greater control and integration capabilities over their financial data than traditional banks typically offer.

Mercury also provides tools for cash management, including FDIC-insured accounts through its partner banks, and access to venture debt for eligible companies seeking non-dilutive funding. Its compliance framework includes SOC 2 Type II certification, addressing security and data privacy standards relevant to financial services. The platform is designed to scale with a company's growth, from initial startup phases to more complex financial management requirements as it matures. For businesses evaluating financial service providers, understanding the range of digital banking options, including those focused on specific niches like startups, can be a relevant consideration, as discussed in broader financial technology analyses by industry observers such as ThoughtWorks on fintech trends.

Key features

• Checking and Savings Accounts: Standard business checking and savings accounts with no monthly fees for basic services, designed for daily operations and cash reserves.
• Credit Cards: Offers corporate credit cards with customizable spending limits and expense management features.
• Venture Debt: Provides access to non-dilutive capital specifically for venture-backed companies, offering an alternative to equity financing.
• Treasury Management: Tools for optimizing cash flow, managing investments, and protecting capital, including options for higher-yield savings and automated sweep accounts.
• API Access: A developer API allows programmatic integration with account data, transactions, and payments, supporting financial automation and custom reporting (Mercury's API documentation).
• Expense Management: Features for tracking and categorizing business expenses, facilitating reconciliation and financial reporting.
• FDIC Insurance: Deposits are FDIC-insured up to applicable limits through Mercury's partner banks.
• SOC 2 Type II Compliance: Adheres to industry standards for security, availability, processing integrity, confidentiality, and privacy of customer data.

Pricing

Mercury operates on a tiered pricing model, with a significant portion of its core banking services offered without monthly fees. Specific advanced features and services incur charges, as detailed below. Pricing information is current as of May 2026.

For the most current and detailed pricing information, refer to the official Mercury pricing page.

Common integrations

• Accounting Software: Integrates with platforms like QuickBooks and Xero for automated transaction syncing and reconciliation.
• Payment Processors: Connects with services such as Stripe and PayPal for unified financial data management. Stripe's documentation provides details on its API capabilities for developers.
• Expense Management Tools: Compatible with various expense reporting and management systems to streamline financial workflows.
• Payroll Providers: Facilitates integration with payroll services for simplified employee compensation and tax management.
• Custom Applications: The Mercury API enables developers to build custom integrations for specific business needs, such as real-time financial dashboards or automated payment triggers (Mercury developer documentation).

Alternatives

• Brex: Offers corporate credit cards, cash management, and spend management solutions primarily for startups and growing businesses.
• Relay Financial: Provides online business banking with multiple accounts, expense management, and integrations for small businesses.
• Novo: A mobile-first business banking platform designed for freelancers, small businesses, and startups, offering integrations with popular business tools.

Getting started

To begin using the Mercury API, you typically generate API keys from your Mercury dashboard. The API uses a RESTful architecture and standard HTTP methods. Below is a basic Python example demonstrating how to fetch account information using the Mercury API. This example assumes you have an API key and the necessary Python libraries (like requests) installed.

import requests
import os

# Replace with your actual Mercury API key
API_KEY = os.getenv("MERCURY_API_KEY") 
BASE_URL = "https://api.mercury.com/api/v1"

headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

def get_accounts():
    endpoint = f"{BASE_URL}/accounts"
    try:
        response = requests.get(endpoint, headers=headers)
        response.raise_for_status() # Raise an exception for HTTP errors
        accounts = response.json()
        print("Successfully fetched accounts:")
        for account in accounts:
            print(f"  Account ID: {account['id']}, Name: {account['name']}, Balance: {account['balance']} {account['currency']}")
    except requests.exceptions.HTTPError as err_http:
        print(f"HTTP error occurred: {err_http}")
    except requests.exceptions.ConnectionError as err_conn:
        print(f"Connection error occurred: {err_conn}")
    except requests.exceptions.Timeout as err_timeout:
        print(f"Timeout error occurred: {err_timeout}")
    except requests.exceptions.RequestException as err:
        print(f"An error occurred: {err}")

if __name__ == "__main__":
    if API_KEY:
        get_accounts()
    else:
        print("Error: MERCURY_API_KEY environment variable not set. Please set it to your actual API key.")

This script initializes with your API key, constructs the necessary headers, and then makes a GET request to the /accounts endpoint. It prints the ID, name, and current balance for each account associated with your Mercury profile. Always ensure your API keys are stored securely, preferably using environment variables, and avoid hardcoding them directly into your source code.