Altenwald is a company with wide experience helping others companies to grow with their technology stack and supporting and giving training for solutions based on Erlang and Elixir.

We build trusted, fault-tolerant systems that can scale to billions of users. Our Erlang & Elixir expertise is the backbone of our clients’ operations.

We build ambitious web and mobile solutions for clients across the world, mostly with Elixir/Phoenix and Ember.js. Our open source air-quality PWA Breethe ( is backed by Elixir.

As lead developer of the Erlang based open source content management system Zotonic, WhatWebWhat is the web- and Erlang consultancy company of Marc Worrell.

Amsterdam, Netherlands

Maximonster uses Erlang and the Zotonic CMS for LearningStone and other platforms. LearningStone is a cloud based learning & collaboration platform for professional training and coaches.

Erlang Companies