After Growing 6,000% Since Their Last Fundraising Round, Doppler Raises Another $6.5 Million To Accelerate Building The First Universal Secrets Manager For Developers Modern software development requires both speed and security. Brian Vallelunga built Doppler, a Universal Secrets Manager for software developers to manage their app secrets secure while still rapidly deploying code. The startup has raised $6.5 million in a fresh new round of funding.