Academia.edu : Turning strings into structured paper and author data, faster than Ruby.
AgilData : MySQL packet capture tool.
Algorithmia : Rust algorithm development is a first-class citizen of our platform.
Autumn : Machine learning in Rust.
Beget : As part of backup, resource management systems and DDOS mitigation
Cambridge Consultants : We are writing and shipping Rust code on projects to our clients.
Ceph : Rust bindings for librbd, an interface into the Ceph storage platform.
Clever Cloud : We host Rust web applications, and a part of our infrastructure is developed in Rust.
CodePicnic : We provide Rust sandboxes people can play around with, as well as fork to expand examples and apps they want to.
Dropbox : Optimizing cloud file-storage.
ETCDEV Team : ETCDEV Team is a group of professional software engineers working full time on Ethereum Classic core projects.
Ethcore : Powering the Ethereum revolution.
Faraday : Securely transferring credentials.
Honeypot : We built and use Searchspot, a kind of search engine based on Elasticsearch. Recruiters use it to search for the developers they're looking for.
npm, Inc : Replacing C and rewriting performance-critical bottlenecks in the registry service architecture.
OneSignal : High volume, cross platform push notification delivery.
OVH : We used Rust to build a high performance, highly available log management system.
Sandstorm : The backend of our Collections app is written in Rust.
SmartThings : Memory-safe embedded applications on our SmartThings Hub and supporting services in the cloud.
thoughtram : The backend of our training platform classroom.thoughtram.io is 100 % Rust using nickel.rs
ThreatX : Threat X Web Application Firewall (WAF) and central analysis engine are written in Rust, facilitating real time analysis of high bandwidth web applications.
Tilde : Optimizing Skylight, the Rails profiler.
Wire : Wire's Axolotl protocol implementation and other cryptographic and utility libraries are developed in Rust, then cross-compiled for iOS and Android.