For comparison, open source password managers are zero cost, 1Password is fixed cost (even more fixed if one buys the software, instead of the subscription), and in contrast https://aws.amazon.com/secrets-manager/pricing/ is $0.40 per secret per month, plus a tiny but not zero cost per API access.
I'm just pointing out that AWS Secrets Manager is not at automatic, no-brainer win
SSM Parameter Store (not Secrets Manager) is also “zero cost” and you can have a parameter of type “secret string”.
The other solutions don’t integrate with AWS IAM. Something has to grant access to the password vault. In the case of Secrets Manager/Parameter Store you just grant access to the role attached to your EC2 instance/ECS cluster/Lambda.
$0.40 per secret seems really high. I guess they aren't doing per-user pricing like other platforms, so maybe it would be cost effective for large teams?
I'm just pointing out that AWS Secrets Manager is not at automatic, no-brainer win