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Key takeaways:
- Part of US compliance is legally mandatory the moment you operate or sell there. The FTC Act, state privacy laws, and sector-specific rules like HIPAA and GLBA aren't optional and carry real enforcement risk.
- Part of it is commercially expected, not legally required. SOC 2 is an example: no law requires it, but most US enterprise buyers ask for it.
- NIST frameworks sit in between. They’re rarely mandatory for private companies, but increasingly the reference standard buyers and auditors expect you to align with them, especially if you sell into regulated industries or government-adjacent markets.
- Conflating what’s legally required with what’s buyer-expected is how startups end up over-investing in certifications nobody asked for, while under-investing in legal requirements that carry actual penalties.
Compliance often gets used as if it's a single thing, and for a US-focused startup, it really isn't.
Part of it is law, so you don't get to opt out, and enforcement is real. Part of it is closer to a market expectation, because no government agency requires it, but enterprise procurement teams have made it a de facto prerequisite for doing business with them.
Startups that treat these as the same category tend to make one of two expensive mistakes: they pour budget into a certification no buyer has asked for yet, or they assume they'll get to compliance once they have SOC 2, while ignoring legal obligations that were already in effect on day one.
This post maps both categories for a US-focused startup, whether you're incorporated in the US, selling into it, or both, and which is which, so you can prioritize correctly instead of guessing.
The map at a glance
What's legally required, the moment you operate in the US
None of the items in this section are things you choose to pursue. They apply based on what your business does.
The FTC Act: Section 5 of the FTC Act prohibits "unfair or deceptive acts or practices," and it's the legal foundation behind most US privacy and security enforcement, even in the absence of a specific law covering your industry. If your privacy policy says you do one thing with data and you actually do another, or if you claim security practices you don't have, that's the kind of gap the FTC has pursued enforcement action over repeatedly. This is the baseline that applies to virtually every US startup, regardless of sector.
State privacy laws: California's CCPA/CPRA was the first, but the list of states with comprehensive privacy laws has grown substantially. Most now follow a broadly similar structure covering consumer rights (access, deletion, and opt-out of sale), but with real differences in scope, thresholds, and enforcement. If you have any meaningful number of consumers in multiple states, being a small startup doesn't exempt you once you cross a state's applicability threshold, which varies by state and is often lower than founders assume.
Revisiting this periodically, rather than treating it as a one-time check, is worth building into your compliance calendar.
Sector-specific overlays: If you handle Protected Health Information, HIPAA applies regardless of company size (check HIPAA Compliance Assessment: Why There's No Certificate for a full breakdown). If you're a fintech handling nonpublic personal financial information, the Gramm-Leach-Bliley Act (GLBA) imposes its own safeguards and disclosure requirements. If your product could plausibly be used by children under 13, COPPA applies, and it's specifically written to catch products that didn't intend to target children but ended up with users under that age anyway.
State breach notification laws: Every US state has a breach notification law requiring you to notify affected individuals within a specific timeframe after a qualifying breach. These laws differ state to state, so there’s not a single US-wide answer; it depends on where your affected users live.
CAN-SPAM and TCPA: If your go-to-market involves email outreach, CAN-SPAM sets requirements around unsubscribe mechanisms, accurate sender information, and honest subject lines. If it involves calling or texting prospects, the TCPA is considerably stricter, with statutory damages that make it one of the more expensive laws to get wrong at volume.
SOC 2: not required by law, but required by nearly every enterprise buyer
Here's where the picture shifts from law to market expectation. SOC 2 isn't mandated by any government body. You could operate a US startup indefinitely without ever pursuing it. But in practice, it's the first thing enterprise security reviews ask for, standardized enough that buyers can evaluate it quickly, and specific enough that, without a SOC 2 report, a deal tends to stall in procurement.
The reality is: if enterprise sales are part of your growth plan, SOC 2 stops being optional, even though it remains legally optional in the technical sense. We cover exactly what the process involves in our SOC 2 compliance guide.
NIST frameworks: the reference standard behind the reference standard
NIST (the National Institute of Standards and Technology) publishes frameworks that are rarely mandatory for private companies, but that show up constantly as the underlying structure other requirements are built on.
NIST Cybersecurity Framework (CSF) is voluntary for most private companies, but it's become something of a common vocabulary. Auditors, insurers, and enterprise security teams reference its five functions (Identify, Protect, Detect, Respond, and Recover) even when the framework itself isn't formally required. Aligning your program to NIST CSF's structure tends to make conversations with all three of those audiences faster, partly because it's often the implicit structure underneath a SOC 2 audit or a cyber insurance questionnaire, even when neither document mentions NIST by name.
NIST 800-53 becomes directly relevant if you're selling to the federal government or to contractors in the federal supply chain, where it's often a genuine requirement via FedRAMP or similar programs, a different, heavier compliance track than a typical SaaS startup needs unless government sales are actually part of the roadmap.
NIST AI Risk Management Framework matters if AI is core to your product. It's voluntary, but enterprise buyers, particularly in financial services and healthcare, are increasingly asking AI vendors to demonstrate governance aligned with it, alongside frameworks like ISO 42001. Check AI Compliance for Startups: EU AI Act, ISO 42001 & NIST for more.
ISO 27001: beyond the US
Plenty of startups that think of themselves as purely US-focused end up with European buyers, EU-based employees, or international expansion plans faster than expected.
ISO 27001 is the framework international and EU-facing buyers most commonly ask for, and it overlaps meaningfully with GDPR's technical requirements. If any part of your pipeline includes European buyers, it's worth reading ISO 27001 for US Startups: When, Cost & How to Get Certified.
How to tell which is which
The single most useful question to ask about any compliance item on your list: does this apply because of what my business does (legal), or because of who I'm trying to sell to (commercial)? Legal requirements apply regardless of your sales strategy and carry penalties for non-compliance. Commercial expectations apply only if your buyers demand them, and the cost of skipping them is a stalled or lost deal, not a fine.
This distinction changes how you should sequence spending. Legal requirements aren't things you can reasonably defer, regardless of company stage, because the penalties don't scale down for early-stage companies.
Commercial frameworks like SOC 2, NIST alignment, or ISO 27001 should be sequenced against actual buyer demand: pursuing SOC 2 before you have enterprise prospects asking for it is usually premature spending.
For a full breakdown of budgeting and sequencing once you know which frameworks you're pursuing, check Compliance on a Startup Budget and First-Time Compliance.
How SecureLeap Supports Your US Compliance Program
SecureLeap works with seed-to-Series B startups navigating exactly this mix: legal requirements that can't wait, and commercial frameworks that need to be sequenced against real buyer demand.
Because legal exposure and buyer-driven certifications require different expertise but usually need to be addressed by the same small team, SecureLeap bundles risk assessment, compliance readiness, and penetration testing under one engagement, so you're not coordinating separate vendors for what's really one compliance program.
Getting Started
SecureLeap offers a free consultation for founders trying to sort out what's actually urgent. During this call, you'll get:
- A clear read on which legal requirements already apply to your business today
- An honest assessment of whether SOC 2, ISO 27001, or NIST alignment is worth pursuing yet, based on your actual pipeline
- A sequencing plan that puts legal exposure first and commercial frameworks second
- A realistic view of what each piece costs, and what happens if you defer it
Book a free 30-min call with Marçal here or send us an email, and we'll help you sort out what's actually urgent versus what can wait.
FAQ: Frequently asked questions
Is SOC 2 legally required for US startups?
No. SOC 2 isn't mandated by any law or government body. It's a commercial expectation, and most US enterprise buyers ask for it during security review, which makes it functionally necessary for enterprise sales, even though it remains legally optional.
What compliance is actually mandatory for a US startup?
The FTC Act's prohibition on unfair or deceptive practices applies to virtually every US startup. Beyond that, applicable state privacy laws, sector-specific rules like HIPAA or GLBA, state breach notification laws, and marketing laws like CAN-SPAM and TCPA apply based on what your business does.
Do I need to comply with NIST frameworks?
Usually not as a direct legal requirement, unless you're selling to the federal government, where NIST 800-53 often applies via FedRAMP or similar programs. Otherwise, NIST CSF and the NIST AI RMF are voluntary, but increasingly used as a reference standard by enterprise buyers and auditors.
Do state privacy laws apply to my startup if we're small?
It depends on the specific state's thresholds, which are often lower than founders assume, based on factors like revenue, volume of consumer data processed, or percentage of revenue from data sales. It's worth checking the specific thresholds for any state where you have a meaningful user base.
Should I pursue SOC 2 before or after handling legal requirements?
After, or at minimum alongside. Legal requirements carry enforcement risk regardless of your sales pipeline, while SOC 2's cost of delay is a stalled deal. A real risk, but different in kind. Startups that skip the legal baseline to fast-track a commercial certification are optimizing for the wrong risk.
Is ISO 27001 relevant if we're only selling in the US right now?
Possibly not yet, but it's worth tracking if international expansion or EU-based customers are anywhere on your roadmap, since the process takes months to complete and is harder to start reactively once a European deal is already asking for it.
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