SOC 2 vs ISO 27001: which should you tackle first?

The SOC 2 vs ISO 27001 question is the most common one we hear from founders preparing for their first audit. Both are credible, both are widely recognized, and both cost roughly the same to achieve the first time around. The honest answer is that the right choice depends almost entirely on where your customers are and what they're going to ask for in their security questionnaires. The stakes are rising either way: 34% of companies report losing business for lack of a required certification, up from 29% the year before (A-LIGN Compliance Benchmark, 2024).

If your buyers are US-based, particularly mid-market SaaS, fintech, or healthcare-adjacent, SOC 2 is almost always the right first move. It's the report procurement teams expect, it maps cleanly to the questions they'll ask, and a Type I can be delivered in 8–12 weeks. The downside is that SOC 2 isn't really a certification; it's an attestation. You can't put a logo on your website that means much outside North America.

If your customers are in Europe, the UK, or APAC, or if you're selling into enterprises with global procurement, ISO 27001 carries more weight. It's a true certification with international recognition, and the underlying ISMS (Information Security Management System) tends to mature your security program in ways SOC 2 doesn't force. The trade-off is a longer first-year timeline (typically 6–12 months) and a heavier ongoing surveillance burden.

A useful tiebreaker: look at the last ten security questionnaires your sales team responded to. If seven of them specifically asked for SOC 2 Type II, start there. If they asked for "a recognized security certification" or named ISO 27001 explicitly, start there. Don't pick the framework that sounds more impressive. Pick the one that closes deals.

For companies that will eventually need both, the sequencing matters less than people think. The control overlap is roughly 80%, so the second audit is materially cheaper and faster regardless of which you do first. The mistake to avoid is trying to do both in parallel in year one. That's how readiness projects slip by six months.