Erlang/OTP R16A has been released. This is a beta release before the R16B product release on February 27:th. OTP R16 i a new major release with a number of new features, characteristics and also some minor incompatibilities. We encourage you to build and test your applications using this release and report unexpected problems to us. See the readme file and the documentation for more details.

R16A Readme File

R16A Source File (89.0 MB)

R16A Binary File (89.0 MB)

R16A Binary 64 File (90.1 MB)

R16A Html Documentation File (30.8 MB)

R16A Man Pages File (1.2 MB)

Some of the highlights are:
•Optimized handling of processes in the VM
◦New internal process table allowing for parallel reads and writes
◦optimized run queue management
◦optimized process state changes
•"Non-blocking" code loading
•New internal port table, and rewrite of scheduling of port tasks.
•Dynamic allocation of port structures, allowing the default for maximum ports to be raised to 65536 (from 1024)
•Support for UTF-8 encoded Unicode characters in source files.
•Inets application: The http client now support HTTPS through a proxy
•Asn1 application: Major cleanup of back ends and optimizations of mainly decode for PER and UPER.
•Support for parameterized modules (but an alternative solution provides) and packages removed
•All built in functions BIF's (even if they are implemented in C as part of the VM) are now visible in the
source code of the module they belong to, including their type specs.
• •The Wx application now compiles and is usable with the unstable development branch of wxWidgets-2.9. 
This means that wx can now be built on 64 bit MacOsX as well. 

Compiling Erlang from source

You can build Erlang from source on your own, following the building and installation instructions. Or use the Kerl script. Kerl is a script that lets you easily build Erlang with a few commands. Follow the instructions to build.

Source Versions and Windows Binaries for Patches

Information about all released OTP versions since OTP 17.0 can be found at the OTP Versions Tree page. This information includes a link to the GitHub source tag, and a link to the README. As of OTP 23, Windows binaries can also be downloaded from here for all patches.

Pre-built Binary Packages

Most OS package managers provide pre-built binary packages. You can also download the latest stable releases from Erlang Solutions. Erlang Solutions provides pre-built binary packages for OS X, Windows, Ubuntu, Debian, Fedora, CentOS, Raspbian and other operating systems. 

  • For Homebrew on OS X: brew install erlang
  • For MacPorts on OS X: port install erlang
  • For Ubuntu and Debianapt-get install erlang
  • For Fedorayum install erlang
  • For FreeBSDpkg install erlang


Since OTP 18.0, Erlang/OTP is released under Apache License 2.0. The older releases prior to 18.0 were released under Erlang Public License (EPL), a derivative work of the Mozilla Public License (MPL).