HashiCorp Vault - is big in Secrets management but its not the Terraform of Secrets management it's just too easy to make another product. AWS Secrets Manager

HashiCorp Vault - is big in Secrets management but its not the Terraform of Secrets management it's just too easy to make another product. AWS Secrets Manager AWS Systems Manager Parameter Store AWS KMS Google Cloud KMS - Cloud Key Management System Azure Key Vault confidant - https://lyft.github.io/confidant https://lyft.github.io/confidant keywhiz - https://github.com/square/keywhiz https://github.com/square/keywhiz knox - https://github.com/pinterest/knox https://github.com/pinterest/knox strongboxsafe - https://strongboxsafe.com https://strongboxsafe.com conjur - https://www.conjur.org https://www.conjur.org + many more Ansible Vault - probably not competing directly I am pretty sure companies like netflix, facebook, uber, tesla and others are probably using their own in house creations.