OpenTofu vs Terraform - Should You Switch?

HashiCorp's license change pushed Terraform from an open source license to BSL, and a Linux Foundation fork called OpenTofu came out of that. This question shows up in interviews because it's a cheap way to check whether you follow infrastructure tooling news and whether you can separate a technical decision from a political one.

The answer interviewers want

OpenTofu is a fork of Terraform that is fully compatible with existing Terraform code. Same HCL syntax, same providers, different governance model (community/Linux Foundation instead of a single vendor).

Migration is not a rewrite. It is, as the source puts it, "literally just swapping the binary." Your existing state files and modules work unchanged - you point your pipeline at the tofu binary instead of terraform and your configs run as-is.

Because of that, the real question isn't technical, it's strategic: do you want your infrastructure tooling to depend on HashiCorp's future licensing decisions, or do you want it governed by an open foundation? There's no meaningful skills gap either way - the HCL you write, the state model you reason about, and the provider ecosystem you rely on are the same in both tools. So the decision comes down to risk tolerance around vendor licensing, not technical capability.

Why interviewers ask this

They're checking if you can tell the difference between a technical migration and an organizational/governance decision. Anyone can say "OpenTofu is a fork of Terraform" - the signal they actually want is whether you understand that the switching cost is near zero and the decision is really about who controls the roadmap. It also tells them if you keep up with ecosystem changes that affect how teams pick tooling.

Follow-ups to expect

• What would actually break if you switched? Nothing in the config or state format breaks, since OpenTofu is a compatible fork - the risk is more about third-party tooling or internal scripts that hardcode the terraform binary name.
• Would you recommend switching today? Frame it as a governance call for the org, not an engineering one: teams uncomfortable depending on a single vendor's licensing decisions lean toward OpenTofu, teams with no such concern have no technical reason to move.
• Does the team need to learn anything new? No - the source is explicit that you're using the same skills either way, since syntax and providers are identical.

The common wrong answer

Candidates often treat this as a technical comparison and start listing feature differences or performance claims between the two tools, when the honest answer is that they're the same tool with different governance. Overcomplicating the answer, or confidently picking a side without naming the actual tradeoff (vendor dependency vs. community governance), signals you haven't actually thought about why the fork exists.