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About

OpenTofu is a Terraform fork, created as an initiative of Gruntwork, Spacelift, Harness, Env0, Scalr, and others, in response to HashiCorp’s switch from an open source license to the BUSL. The initiative has many supporters. On the technical level, OpenTofu 1.6.x is very similar feature-wise to Terraform 1.6.x. In the future, the projects feature sets will diverge. The other main difference is that OpenTofu is open source, and it's goal is to be driven collaboratively with no single company being able to dictate the roadmap. Companies will encounter more difficulties with the situation. Switching to a new project carries risks, but staying with a project that changes its license without warning is far riskier. This risk is minimized by giving OpenTofu to the Linux Foundation, and OpenTofu’s aim of maintaining feature parity with Terraform for future releases reduces the technical risks.

About

Proofline is a hosted code review service that evaluates GitHub pull requests against deployment-environment evidence. It checks code paths, configuration, dependencies, permissions, resource limits and deployment facts to identify production risks before merge. Findings explain failure mechanisms and cite code and environment evidence. Missing, stale or unavailable evidence is identified as an assessment gap, not treated as proof a change is safe. Engineers inspect reviews in the Proofline console and can connect coding agents to review status or share findings. Supported sources include AWS, Google Cloud, Vercel, Cloudflare Workers, Kubernetes, Terraform, OpenTofu, Docker Compose and Backstage. Proofline offers GitHub Actions integration, a CLI, MCP access, an HTTP API, and TypeScript and Python SDKs for requesting or inspecting reviews. Infrastructure connections are read-only; teams choose which repositories and environments to connect and how to address findings.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

IT teams wanting a complete DevOps solution

Audience

Software engineers, platform engineering teams, DevOps and SRE teams, and engineering leaders reviewing code changes against production infrastructure.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

$20/person/month
The Free plan includes 10,000 one-time organization credits, plus 5,000 credits when the first environment is ready; it has no subscription or recurring free credits. Basic is $20/person/month for 2,000 credits, and Ultra is $60/person/month for 6,000 credits. Prices are in USD plus tax. Monthly credits are per person, not pooled, and expire at month-end.
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

OpenTofu
opentofu.org

Company Information

Proofline
Founded: 2026
Germany
proofline.sh/

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Recurse

Recurse

Recurse ML

Categories

DevOps Supported

Categories

AI Code Review Supported
Code Review Supported

Integrations

Amazon Web Services (AWS) Not Supported
Backstage Not Supported
Brainboard Supported
ClouDNS Supported
Cloudgeni Supported
Codex CLI Not Supported
Cursor Not Supported
Gardience Supported
Gemini CLI Not Supported
GitHub Actions Not Supported
Google Cloud Platform Not Supported
Kiro Not Supported
Kubernetes Not Supported
Model Context Protocol (MCP) Not Supported
OpenTofu Not Supported
Proofline Supported
Spacelift Supported
Stategraph Supported
Terraform Not Supported
Vercel Not Supported

Integrations

Amazon Web Services (AWS) Supported
Backstage Supported
Brainboard Not Supported
ClouDNS Not Supported
Cloudgeni Not Supported
Codex CLI Supported
Cursor Supported
Gardience Not Supported
Gemini CLI Supported
GitHub Actions Supported
Google Cloud Platform Supported
Kiro Supported
Kubernetes Supported
Model Context Protocol (MCP) Supported
OpenTofu Supported
Proofline Not Supported
Spacelift Not Supported
Stategraph Not Supported
Terraform Supported
Vercel Supported
Claim OpenTofu and update features and information
Claim OpenTofu and update features and information
Claim Proofline and update features and information
Claim Proofline and update features and information