Node.js / TypeScript Authentication for SaaS Products

Authentication is a critical aspect of building any software as a service (SaaS) product. It is the process of verifying the identity of users who access your SaaS platform, and ensuring that only authorized users can access the features and data within it. In today’s digital age, where data breaches and security threats are becoming increasingly common, ensuring robust and secure authentication mechanisms is more important than ever. With our SaaS boilerplate Volca, you get a secure, tested and well design authentication mechanism. Read more about how we implemented authentication in Volca below as well as various aspects of authentication for SaaS products, including best practices, common pitfalls, and the most popular authentication methods used by SaaS providers.

Are you building a SaaS product? Our starter kit Volca includes this feature and everything else you need to build a profitable SaaS. Read more here


AWS Cognito

AWS Cognito is a fully-managed service provided by Amazon Web Services (AWS) that provides user sign-up, sign-in, and access control functionalities for web and mobile applications. It is a scalable and secure user directory that can handle user authentication and authorization for millions of users. With AWS Cognito, developers can easily add user authentication and authorization to their applications without the need to build their own user management system from scratch. Additionally, AWS Cognito can be integrated with other AWS services such as Amazon S3, Amazon DynamoDB, and AWS Lambda to build a complete serverless application stack.


AWS CDK (Cloud Development Kit) is a software development framework used to define cloud infrastructure as code. It allows developers to define infrastructure in familiar programming languages and then generates the corresponding AWS CloudFormation templates. CDK is used to set up authentication in Volca by defining resources such as Cognito user pools and identity pools, making it easier to manage and version control the infrastructure.

What is important when it comes to authentication for SaaS products?

Authentication is a critical aspect of building a SaaS product, as it enables users to securely access their data and manage their accounts. Here are some important considerations when it comes to authentication for SaaS products:

Security: Security should be the top priority when it comes to authentication. SaaS products must use secure authentication methods, such as multi-factor authentication, to ensure that only authorized users can access the system.

User Experience: While security is important, it should not come at the expense of user experience. SaaS products should aim to provide a seamless, user-friendly authentication experience to reduce user frustration and promote adoption.

Scalability: As a SaaS product grows, it must be able to handle an increasing number of user authentication requests. Therefore, it’s important to use authentication methods that can scale easily and efficiently, such as token-based authentication.

Compliance: Depending on the industry, SaaS products may be subject to various regulatory requirements, such as HIPAA or GDPR. It’s important to ensure that authentication methods comply with any relevant regulations.

Integration: Authentication must be integrated with other parts of the SaaS product, such as user management and access control. It’s important to ensure that the authentication system can work seamlessly with other parts of the system to provide a unified user experience.

What authentication providers should I have for my SaaS?

The authentication providers you should have for your SaaS product will depend on your specific needs and the preferences of your users. However, here are some commonly used authentication providers for SaaS products:

Email and password authentication: This is the most basic form of authentication, where users create an account with their email address and a password.

Social login: Many users prefer to use their existing social media accounts to log in to other services. Common social login providers include Facebook, Google, Twitter, LinkedIn, and GitHub.

Two-factor authentication: Adding an extra layer of security through two-factor authentication (2FA) can help prevent unauthorized access to user accounts. Common methods of 2FA include SMS verification codes, app-based authentication (such as Google Authenticator), and hardware keys (such as YubiKey).

Single sign-on (SSO): SSO allows users to log in to multiple services using a single set of credentials. Common SSO providers include Okta, Microsoft Azure Active Directory, and Google Cloud Identity.

OAuth 2.0: OAuth 2.0 is an open standard for authorization that allows users to grant access to their data on one service to another service. Common OAuth 2.0 providers include Google, Facebook, and Twitter.

It’s important to note that while offering a variety of authentication providers can be convenient for users, it can also increase the attack surface of your application. Therefore, it’s important to properly secure all authentication methods and regularly monitor for any suspicious activity.

In this article we will go through what authentication is and how to implement authentication in your node.js service.

Best practices for authentication in SaaS products

Use HTTPS: All communications between the user’s browser and the SaaS product should be encrypted using HTTPS to prevent eavesdropping and man-in-the-middle attacks.

Enforce strong password policies: Passwords should be complex and difficult to guess, and users should be required to change them regularly.

Implement multi-factor authentication: To provide an additional layer of security, consider implementing two-factor authentication or biometric authentication.

Limit failed login attempts: To prevent brute-force attacks, limit the number of failed login attempts and lock out users who exceed the limit.

Monitor for suspicious activity: Regularly monitor user activity logs for signs of suspicious activity, such as failed login attempts from multiple locations.

What are some common pitfalls when implementing authentication for a SaaS product?

Implementing authentication for a SaaS product is a crucial aspect of building a secure and user-friendly application. However, there are some common pitfalls that can be encountered during implementation. Here are some of the most common pitfalls:

Weak password policies: Weak password policies are one of the most common security risks in authentication. Implementing weak password policies such as allowing short or easily guessed passwords, or not enforcing password complexity can lead to potential security breaches.

Insufficient data validation: Insufficient data validation can lead to a variety of security risks, including SQL injection and cross-site scripting (XSS) attacks. All user input should be validated and sanitized to ensure that it meets the requirements of the system and is not malicious.

Lack of two-factor authentication (2FA): Two-factor authentication provides an additional layer of security to the authentication process. Not implementing 2FA can leave the system vulnerable to attacks such as brute force attacks, password spraying, and phishing.

Insecure session management: Session management is an essential part of authentication, and if not implemented correctly, it can lead to session hijacking and other security risks. Sessions should be properly managed, and the system should ensure that session tokens are not compromised.

Not implementing rate limiting: Rate limiting is important to prevent brute force attacks, where an attacker attempts to guess a user’s password repeatedly. Without rate limiting, an attacker can easily guess passwords and gain access to user accounts.

By being aware of these common pitfalls, developers can take the necessary steps to ensure that authentication is implemented securely and effectively in their SaaS product.