1+ million mobile app developers and marketing teams use OneSignal to send push notifications, in-app messages, emails, and SMS messages. We started as a YCombinator-backed company. Our founders were frustrated with existing push notification tools,…

QuestDB is a an open source SQL database to process time-series, faster. The founding team comes from low-latency trading; fast software and timestamped data are part of our DNA. Through QuestDB, companies can harness the power of real-time and big …