Shared Contacts for Gmail vs Supertokens

Share your Gmail Contacts with any Gmail or Google Workspace (G Suite) users

Shared Contacts for Gmail ® enables Google Workspace, previously known as G Suite, Gmail or Android/iOS users to create and access team address books. Shared Contacts can be created and accessed from anywhere in their work space (Gmail, Google Contacts, Google Drive, Calendar, Mobile phones etc.)

With Shared Contacts for Gmail® you can create Contact Distribution Lists (aka “contacts labels”), organize them easily, and share them by defining permissions exactly like you would do with a folder or a Google Doc in the Drive:
View Only
Edit
Delete permission
Re-share
Transfer of ownership
Whether you compose or read an email, visit your Google contact Manager or use your phone contacts app, you will always be able to pick, add or edit shared contact in one click.

Unlike other contacts sharing solutions, Shared Contacts for Gmail brings shared contacts capabilities everywhere. For instance, when you send or receive an email, you can see the relevant information of each sender and recipient (like with a CRM):

Email, Phone, Company, Job Title
Notes added to the contact
Previous interactions you had with this contact

Shared Contacts for Gmail is built to enhance your Gmail, Google Contacts, Google Drive, Calendar, your mobile contacts app etc. to include contact sharing features without need to use a third party tool.
It boosts productivity of all Gmail and Google Workspace, previously known as G Suite, users, by providing a solution to a huge problem that Gmail and Google Workspace do not solve i.e. the ability to share contacts and contact groups, just like you share documents with your team members. It will help you to be more effective while collaborating in real-time.

It offers a 15-Day Free Trial [no CC required] to try and see how it can help your team in improving your business.

Key Features
Create shared address books from everywhere
Define access permissions in your organization
Share contacts from your mailbox
Share and synchronize contacts from Google Contacts
Unlimited sharing of contacts and contact groups
Mobile/Tablet & Outlook sync
Permissions Management
Live Chat and Email Support
Sharing with external domains
Instant Synchronization
Advanced logging and security features
Unlimited Contact Backup
Web App, Gmail Add-on and Chrome Extension

Location: New York, United States

Open source user auth that is quick to implement and give you complete control over the login.

SuperTokens offers open source user authentication.

SuperTokens enables developers to quickly implement user authentication without giving up control.

Our frontend SDK consists of prebuilt UI is hosted natively on your website - enabling you to easily control the end user experience (as opposed to a UI hosted by a 3rd party authentication provider). Similarly, all the auth logic resides on the SuperTokens backend SDK that integrates within your API layer (Node, GoLang Python) as opposed to the logic being hosted by a 3rd party provider where you have limited control

Location: Mumbai, India