A software vendor tells you they are SOC 2 Type II certified and ISO 27001 certified, and you nod, because the alternative is admitting you are not entirely sure what those mean. They are not the same thing, they are not interchangeable, and knowing the difference makes you a sharper buyer when your data is what is on the line.
Both are ways of proving a company takes security seriously enough to have it checked by someone outside the building. How they prove it is where they differ.
What SOC 2 is
SOC 2 is an audit, run by an outside firm, against a set of trust principles like security, availability, and confidentiality. It comes in two types, and the difference matters.
Type I checks that the right controls exist on a given day. Type II checks that those controls actually worked over a stretch of time, usually six months to a year. Type II is the stronger claim, because it is the difference between having a lock and proving the lock was used every day for a year. When a vendor says SOC 2 Type II, that is the one you want to hear.
What ISO 27001 is
ISO 27001 is an international standard for running an information security program. Rather than auditing a fixed set of controls, it certifies that the company has a working system for finding risks, deciding what to do about them, and keeping that going over time.
The simple way to hold the two apart: SOC 2 leans toward proving specific controls worked, and ISO 27001 leans toward proving there is a managed system behind them. They overlap a lot, which is why serious vendors often hold both. Together they cover both the controls and the program that maintains them.
What this means when you are buying
For you as a buyer, the certifications are a shortcut. They mean an outside auditor has already done a level of due diligence you would otherwise have to attempt yourself, and the vendor cared enough to submit to it. A few things worth doing with that:
- Ask for SOC 2 Type II specifically, not just SOC 2, since Type I is a much weaker claim
- Check the date, because a certification is a point in time and an old report is worth less than a current one
- Ask what was in scope, since a certification covers a defined system, not automatically the whole company
- Treat the absence of either as a fair question to raise, not an automatic no
Tactic Systems holds SOC 2 Type II and ISO 27001:2022 for this reason, because when a platform holds your data, you should not have to take its security on faith. The certifications are not marketing badges. They are the receipts.
You do not need to become a security auditor to buy software well. You just need to know what the badges claim, ask for the stronger version, and check they are current. That alone puts you ahead of most buyers, and it is the difference between trusting a vendor and verifying one.