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FullContact is a privacy-safe Identity Resolution company building trust between people and brands, while also putting people and brands in control of their information.


FullContact can help companies solve many identity challenges that they face with their customers. FullContact can gain unparalleled recognition and insights by mapping fragmented identities into a persistent PersonID with their person-first identity graph. Increase your knowledge about site visitors in the moments that matter to improve ad relevance, audience rates, associated ROI, all increasing your overall advertising revenues.

Main Features

  • Identify anonymous customers browsing your website(s) without requiring an authentication event

  • Recognize customers in a single view using the FullContact persistent, portable PersonID (PID)

  • Enrich anonymous, new, and existing customers with actionable insights like Demographics, Shopping Habits, Automotive preferences, and many more (see our Insight Bundles for the details)

  • Maintain full compliance with industry-leading PII protection on you own, secure FullContact “Private Identity Cloud”

Getting Started with FullContact

Step 1: Create an account

Go to and create a new free account

  • You can make as many accounts as you want, but only one will be associated with your data - pay attention to which email you use for your main account

Step 2: Match Test

To test how well FullContact’s identity graph recognizes your customer data, we recommend you perform a match test:

  • Navigate to the 'Match Test' tab on the FullContact Platform
  • After clicking the ‘Upload Your File’ button, either copy/paste or upload a .csv of up to 200k customers (expected file format here)
  • Once the test is complete, you can view the results on the ‘All Reports’ section of the FullContact platform

Step 3: Customer Recognition Tag Test

Satisfied with the match test results? Contact our team using the chat button on the bottom right, and we’ll set you up with access to do a live test using our Customer Recognition Tag

  • Once enabled, you will see a ‘Customer Recognition’ tab on the FullContact Platform - for our Optimizely integration, our team will provide you with a custom code snippet to place on your site/tag manager
  • NOTE: Don’t use the ‘Generate Tag Key’ feature on the FullContact Platform - that code snippet will not integrate with Optimizely

  • To see how the tag matches your CRM file, you will also need to send your desired CRM file to FullContact, and we’ll populate your Private Identity Cloud
  • For the limited duration of your tag test, you will see how well the Customer Recognition Tag is performing on your website(s)

Step 4: Optimizely Integration

Want the Customer Recognition Tag to feed into Optimizely? How about enriching customer records in Optimizely with additional HEMs/MAIDs or actionable, demographic/psychographic data? First, we’ll need a couple of things from you:

  • Your Optimizely API Key
  • Your Optimizely S3 Bucket credentials
  • A complete Private Identity Cloud (if not loaded during the Customer Recognition Tag test)
  • FullContact can pull all your customers from Optimizely, if desired
  • One-time on start-up, or on a refreshed on a regular basis (discuss with FullContact)
  • Desired Enrichment Data (if applicable)
  • Specify which enrichment bundles you want your customers appended with

Step 5: Enjoy!

Once your FullContact representative receives your information and gives you the green light, congratulations - you have successfully integrated FullContact into Optimizely!

  • Anonymous website visitors are now recognized and stored in Optimizely in real-time, for segmentation and activation
  • Use the FullContact ‘PersonID’ within Optimizely to get a single-view of each customer
  • Customers are now enriched with FullContact’s robust data set (updated daily)

Request this integration

Send us a request and the app publisher will get in contact with you directly.

Optimizely will store and process your personal data as described in our Privacy Policy. You can opt out at any time.

Optimizely will store and process your personal data as described in our Privacy Policy. You can opt out at any time.