Crowdin

Crowdin is a proprietary, cloud-based localization technology and services company. It provides software as a service for commercial products, and it provides software free of charge for non-commercial open source projects and educational projects.
History.
The company was founded in 2008 by Serhiy Dmytryshyn as a hobby project for localization of small projects. The platform was officially launched in January 2009. Since then it was adopted among software and game development (included Minecraft) companies, for software translation.
Translation mechanics.
The tool has an Online Translation Editor, where texts can be translated and proofread by linguists. Translation strategies: in-house translation team, crowdsourcing, translation agency. Crowdin has a marketplace with translation agencies: Inlingo, Alconost, Applingua, Babble-on, Gengo, Tomedes, Translated, Translate by Humans, WritePath, Farsi Translation Services, Bureau Translations, e2f, Web-lingo, Leanlane, and Acclaro.
Crowdin has integrated machine translation into the translation workflow. Currently supports the following MT systems: Microsoft Translator, Yandex.Translate, Google Translate, Amazon Translate, Watson (IBM) Translator, DeepL Translator. Machine translations can be post-edited.
In-Context.
The company has an in-context tool for live translations.
API and integrations.
Crowdin integrates with several tools: GitHub, GitLab, Bitbucket, Jira, Android Studio, Google Play, other.
Notable users.
Among the companies using Crowdin are GitLab, Xiaomi, XDAdevelopers, Raspberry Pi Foundation, iFixit, JetBrains, Reddit, Uridu, Be My Eyes, Khan Academy, Maxthon, Ask.fm, PrestaShop, Joomla, Wrike, Kickstarter, Deutsche Welle, and more. Users include tech companies, localization managers, translation agencies, and translators. 