Heroku comes from and is built for the developer community; the values of experimentation, openness and accessibility have been part of the product from day one, and continue to drive its development. From our first days, we have provided a free tier that followed in the tradition of making it as easy and fun as possible for developers to learn and play, discover new technologies, and build new apps — and that's not changing. It's as rewarding to us today as it was seven years ago to see experienced developers, students and hobbyist hackers use Heroku in that spirit every day.

Free services have, and will continue to be, a key part of Heroku’s offering. Today we are announcing the...


Important update

We've recently made some big updates to our support for Docker and the feature described in this blog post has been deprecated. Learn more in the container registry and runtime dev center documentation.


When Heroku launched the Cedar container stack 4 years ago, we became one of the first companies to use Linux Containers (LXC) to create a secure, performant and scalable cloud platform. Heroku has been a leader in the containerization movement, and we’ve spent years hardening, honing and evolving our runtime container stack. This means that developers can git push apps written in their favorite language and Heroku will build containers that are deployed to a...


At Heroku and at Salesforce, we’re always looking for ways we can help increase the number of young women with access to careers in science, technology, engineering and math. Recently, thanks to a Heroku engineering manager’s involvement on this issue with a local school, we hosted a Technovation Challenge event at the Heroku offices. We wanted to share the story about this great program - the Technovation Challenge is an annual competition, and you could do something similar in your community!

Some background

For the past 3 years, Heroku engineering manager Margaret Le has mentored a group of high school girls at the Immaculate Conception Academy (ICA), a San Francisco high school...


Today we’re excited to announce public beta support for HTTP session affinity, a feature that makes building real-time applications easier than ever. Session affinity improves end user experience in certain types of applications and architectures where you require some level of extra state within your application code, because it ensures related requests get routed to the same instance of your code. This improves performance reducing the need to go and get the needed state for a specific user.

At high level, here's how it works: When you enable session affinity on your application, the Heroku router will set a special cookie on every HTTP request. This cookie will allow our routing...


We’re pleased to announce PostgreSQL 9.4 in general availability for Heroku Postgres. After announcing the beta earlier this year, we’ve had many developers provision databases against this new version. Throughout the beta period, developers raved about the new data type along with the performance enhancements to materialized views. This uptake by early adopters demonstrates an interest in everything that the new version of PostgreSQL provides, from features to performance.

New Features and Performance Updates

One of the most notable new features of 9.4 is the JSONB data type. While the text-based JSON data type has existed in PostgreSQL for some time, JSONB is a binary storage format...


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