Open-source
GitOps for Terraform
Run Terraform in the CI system you already have
Your CI
Your Cloud
See plan output in the pull request
Plan persistence
Apply via comment
Multi cloud
Multi CI
PR-level locks, stored natively in your cloud provider
Terragrunt support
Terraform version support
Simple yml config file
Plans
Open-source
Free
Any cloud: AWS, GCP, Azure
Any CI: GitHub Actions, Gitlab, Azure DevOps
PR-level Locks
Plan / apply preview in comments
Plan Persistence
Workspaces support
Terragrunt support
Apache 2.0 license
Digger Pro
Open Policy Agent & Conftest
Drift detection (via Driftctl)
Cost Estimates (via Infracost)
Audit Trail
Role Based Access Control
OIDC Federated Access
SSO via SAML 2.0
Support / SLA
Compared to
Atlantis
Runs all terraform processes in the same VM
it is hosted on, a bit like Jenkins
Re-uses your CI infrastructure with jobs, logs, compute, orchestration etc - so it is scalable and secure
Terraform Cloud
Env0
Spacelift
Open-source
Works with your CI so you don’t overpay for third-party managed compute
Secure: secrets never shared with Digger
