Infisical is an open-source secret management platform that offers a comprehensive set of tools for managing secrets securely across infrastructure, certificate lifecycle management, and more. It has over 12,700 GitHub stars and is widely adopted by Fortune 500 enterprises, startups, and international governments. Compared to Doppler, Infisical has a more advanced feature set and a larger developer community. HashiCorp Vault is another alternative that provides advanced functionality for managing application identities and providing secure access to cloud resources. AWS Secrets Manager is a native secrets management solution provided by AWS that offers simplicity but limited features compared to Doppler and Infisical. Building an in-house secret management tool can offer customization, control over updates, and compliance, but it also comes with challenges such as resource-intensive development, ongoing maintenance, and security expertise requirements.