App of the Day

Communicate with anyone based on their personality


Powerful Contact Insight Right In Your Inbox.

Aggregated Contact Profiles
Alerts and Notifications
Analytics and Reporting
Automated Engagement
CRM Integration
Campaign Management
Email Tracking
Lead Qualification Rules
Marketing Tools
Response Templating
Team Collaboration
Workflow Management

$19 - $99 / Month


$10 / User / Month

Operating Systems
Operating Systems









Crystal is the biggest improvement to email since spell-check. 

It tells you the best way to communicate with any prospect, customer, or coworker based on their unique personality.

What's the difference between a bad communicator and a good one? Empathy.

Crystal creates unique personality profiles for every person with an online presence, preparing you to speak or write in someone else's natural communication style.

When you write an email, Crystal tells you the words, phrases, style, and tone you should use to reach the recipient in the way that they like to communicate, rather than your own.

Powerful Profiles in Your Inbox

Sidekick shows you powerful information about your contacts right in your inbox. See a contact’s professional history, where they live, mutual contacts, email history and so much more.

See Who Opens and Clicks Your Email

With Sidekick email tracking, get live notifications when someone opens or clicks on one of your emails. Know when, how many times, where, and from what device they opened your email.

Easily Schedule Emails for Later

With Sidekick email scheduling you can schedule emails to be sent in the future. Send reminders to yourself, or make sure that your recipient gets the email when you want them to get it.

Unique Features & Benefits

  • Gmail plugin that makes suggestions as you type
  • Personality profiles for your contacts
  • Alternative text suggestions for your words

Get To Know Your Contacts Instantly

Ever get an email and spend countless time trying to find that person on LinkedIn, Twitter, Facebook or Google? Stop clicking around and get a persons title, company, social media accounts, and recent social media activity right in your inbox.  

Company Info at Your Fingertips

Get to know a contacts company in seconds. Company profiles alongside your email show you a company's location, number of employees, revenue, industry, key contacts, and much more

*Works in Gmail, Outlook, and Apple Mail.

See how it works

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