Greenhouse will be deactivating support for TLS v1.1 on August 12, 2019 across our public facing applications, including Greenhouse Recruiting, Greenhouse Onboarding, Business Intelligence Connector, Job Boards, and the Harvest API.

We are providing you advanced notice so that our customers and partners can prepare accordingly. If you are using unsupported clients to connect to Greenhouse after the deprecation of TLS v1.1, you will begin receiving connection error messages.

Service URLs
Greenhouse Recruiting,, https://<sso-custom-domain>
Greenhouse Onboarding
Greenhouse Job Boards 
Harvest API 
Job Boards API 
Greenhouse Recruiting and Events Mobile Applications 
Business Intelligence Connector jdbc:redshift:// 


Why are we deactivating TLS v1.1? 

We are deactivating TLS v1.1 to ensure that Greenhouse Software is providing our customers and partners with safe and secure protocols for our connections. This change is enforced throughout the industry to maintain secure connections that encrypt and protect your sensitive data from malicious breaches. All major browsers will begin requiring a minimum of TLS 1.2 starting in early 2020, and many networking services have already required TLS 1.2 and higher.


Am I affected? 

Greenhouse has done some initial analysis and the deprecation of TLS v1.1 should only affect < 0.1% of our total traffic. There are two major categories of users that could be affected by the deprecation of TLS v1.1:

1. Customers and candidates using old browsers or mobile devices

This includes customers using unsupported browsers to access Greenhouse Recruiting and Greenhouse Onboarding applications as well as job applicants accessing job boards hosted by Greenhouse.

Supported Browsers
You can use the following website to easily determine if your browser supports a version of TLS > v1.1.

Browser Version Notes
IE 11  Can be enabled in 8
Edge  12+ Supported in all versions 
Firefox  27+ Released Feb 3, 2014 
Chrome  30+  Released Aug 19, 2013 
Safari  7+  Released Oct 21, 2013 
Opera 12.1, 17+  Released Nov 4, 2012 
iOS Safari 5+ Released Mar 6, 2012
Opera Mini All  
Chrome for Android 74  
Firefox for Android 67  

Table generated from data at


2. Customers using HTTP clients to connect to our Harvest and Job Boards API 

Customers who have written their own API clients and are using clients that do not support TLS v1.2 and above will no longer be able to successfully connect to our Harvest and Job Boards API. Customers must ensure that they are using an HTTP client library which supports TLS 1.2 before the deprecation date.

Greenhouse will perform analysis on connections to our Harvest API, Job Boards API, and Business Intelligence Connector and will proactively communicate with affected customers to ensure a smooth transition. We encourage each customer that utilizes these APIs to ensure that they are prepared for the deprecation date and to not rely solely on our communication.

You can use the following API to easily test the library you are using for API connections to Greenhouse to ensure it supports TLS v1.2 or greater.

The HTTP response will contain a tls_version value which contains the highest version of TLS that is supported by the client.