A large enterprise client is demanding an ISO 27001 certificate from us, what exactly is this and is it really necessary?

Whatever you do, don't just cut the conversation short with "we don't have this certificate." A lot of big enterprises will grant provisional approval if you tell them, "We've initiated our ISO 27001 compliance project with a target audit date in 6 months," and back it up with your current baseline security policies.

In the latest ISO/IEC 27001:2022 revision, the Annex A controls were streamlined down to 93 items. As a software agency, what will concern you most are the secure software development lifecycle (SDLC), source code repository access logs, test data anonymization, and separating production from development environments.

We got certified last year with an 11-person team in Madrid. We paid 5,000 euros to an external consultant and 3,500 euros to the accredited audit firm for the first year. The whole thing took 5 months. It might look pricey, but for a 120,000 euro annual contract, that investment definitely pays for itself.

If you're doing this just for a single client think twice imo. This isn't a piece of paper you get once and hang on the wall; there's a surveillance audit every year and you have to pay for it. Constantly keeping records and filling out risk forms seriously slows down the dev workflow in a 9-person shop.

Looking at hundreds of pages of standard clauses is pretty intimidating at first. But once you dive in, you realize it's mostly about formalizing procedures that any software team taking its work seriously is already doing informally anyway.

What exact data will you be accessing in the client's system? If you are only running code on their servers and not hosting client data in your own office, you might be able to narrow down the audit scope and cut both the timeline and costs in half.

we went through the exact same thing with a telecom client, patched up our vulnerabilities, handed over a third-party pentest report, and bought ourselves 6 months and definitely dont walk away from the deal just yet.

In the Spanish market, enterprises and public entities treat ISO 27001 as a mandatory baseline for vendor security. Achieving this certification is a strategic move that will provide a competitive advantage in your future enterprise sales pipelines.

Let me share what happened to me; it might be useful. I mean when we decide without measuring, we always end up in the same place.

If I were you Id go this route.

I partly agree, partly disagree. Any unwritten clause becomes a point of disagreement later, as both sides remember it differently.

Good luck with that.

Just a heads-up. If the notification path is long notifications don't arrive; missing notifications mean delayed incident detection.

Good luck with that.

I'm writing this so you don't make the same mistake. An automated scan report is not the same as a penetration test.

Just leaving this note, it might be useful.

to get into the details: If the notification path is long notifications don't arrive; missing notifications mean delayed incident detection.

solutions that work at a small scale collapse when you grow; I learned this late but just leaving this note it might be useful.

Same here. The biggest time-waster for us was not knowing who had the final say.

If you get three different answers on a topic, the question was asked wrong.

We need to make a distinction here. Mistakes made on the what is ISO 27001 side are usually reversible but expensive.

If you post the result here, it will help others too.

Timely topic.

Looking at it as a process, the picture changes. Don't rely on a single measure; go layer by layer.

Correct me if I'm wrong.

It's rare to find an explanation this clear... Your time to detect an issue directly determines its cost.

Proven by experience.