Outsourced vs In-House Security: The Real Math for Startups

A senior security engineer in the US costs $180,000-$250,000 in salary, plus benefits, plus tools, plus training. That is $220,000-$320,000 in fully-loaded cost. And one engineer is not a security team. You need at least two for coverage, which puts you at $440,000-$640,000/year.

An outsourced security program costs $3,000-$15,000/month ($36,000-$180,000/year). The math seems obvious. But it is not that simple. Most startups at this stage end up with some form of CISO as a service rather than a full in-house team.

What outsourced security actually includes

A good outsourced security provider gives you a fractional security team. Depending on the engagement, that typically includes:

• A virtual CISO who sets security strategy and handles compliance
• Vulnerability management: regular scanning, prioritization, and remediation guidance
• Security monitoring: log analysis, alert triage, incident detection
• Compliance management: SOC 2, GDPR, HIPAA preparation and maintenance
• Security architecture review for major features and infrastructure changes
• Incident response planning and support
• Security awareness training for your team

What you typically do not get: hands-on engineering. An outsourced security team will tell you what to fix and how to fix it, but your engineers do the actual implementation.

What in-house security gives you

An in-house security engineer is embedded in your development process. They can review pull requests, build security tooling into your CI/CD pipeline, implement security controls directly, and respond to incidents in real-time. They understand your codebase intimately. They build relationships with your engineering team that make security collaboration natural rather than adversarial.

The response time difference is significant. An outsourced team might take 4-24 hours to respond to a security question. An in-house engineer can answer it in minutes. During an active incident, that speed difference matters.

The real comparison

Here is how the two options compare across the dimensions that matter:

Cost: Outsourced wins by 60-80%. An in-house team of two costs $500K+/year. A solid outsourced program costs $60K-$180K/year.

Response time: In-house wins. Same-day vs next-day for non-urgent issues. Minutes vs hours during incidents.

Depth of knowledge: In-house wins. They know your codebase, your architecture, and your threat model intimately.

Breadth of experience: Outsourced wins. They work with dozens of companies and have seen more attack patterns, more compliance scenarios, and more architecture variations.

Availability: Outsourced wins for 24/7 coverage. Two in-house engineers cannot provide around-the-clock monitoring. An outsourced SOC can.

Scalability: Outsourced wins. Need more capacity for a SOC 2 push or a security incident? They can ramp up. Scaling an in-house team means months of recruiting.

The recommendation by stage

Pre-seed to seed (1-20 employees): Outsourced. You do not have the budget or the workload to justify a full-time security hire. An outsourced engagement at $3,000-$8,000/month covers your needs.

Series A (20-50 employees): Outsourced plus one in-house security champion. Identify a senior engineer who is interested in security and give them 20% of their time to work on security projects. The outsourced team provides strategy and expertise. The in-house champion does implementation.

Series B+ (50+ employees): Start building an in-house team and use outsourced services for specialized capabilities you cannot staff internally (24/7 monitoring, compliance management, penetration testing).

The costs that never make it into the comparison

Both sides of this decision carry expenses that do not appear in the salary line or the monthly invoice, and they are large enough to change the answer.

On the in-house side, start with the cost of hiring at all. A retained search for a senior security engineer runs 20 to 25 percent of first-year salary, and security roles sit open longer than general engineering roles because the candidate pool is small and heavily counter-offered. Three to six months of vacancy is normal. Then add ramp: even a strong hire spends their first quarter learning your architecture before they produce much, and the compliance deadline that motivated the hire does not move to accommodate that.

Then there is the bus factor. One security engineer is a single point of failure with no redundancy. They take vacation during your observation window. They get poached eleven months in, taking every undocumented decision with them, and you restart the search. Companies that hire one security person to own compliance and then lose them mid-audit end up buying outside help anyway, at short notice, at the worst possible price.

On the outsourced side, the underestimated cost is context transfer. An external team needs access, architecture walkthroughs and answers to questions your engineers find tedious. That is real internal hours in month one and recurring hours thereafter. There is also the scope boundary: outsourced advice is only as good as your capacity to act on it. A provider who hands you 40 prioritized findings creates value only if someone on your team has the time to fix them. Plenty of engagements fail here, and the failure looks like the provider underperforming when the actual problem was that nobody was allocated to do the work.

The mistake that costs the most: hiring for the wrong job

The security engineer market contains several distinct roles that share a title. Detection and response engineers build pipelines and tune alerts. Application security engineers review code and threat model features. Infrastructure security engineers harden cloud and identity. Governance and compliance people run frameworks, write policy and answer buyers.

Most Series A companies believe they need a security engineer when what is actually blocking revenue is the fourth category. The security questionnaire sitting in the sales team's inbox, the SOC 2 the enterprise prospect requires, the insurer's control attestation and the investor diligence pack are all governance work. Hire a talented detection engineer to do it and two things happen: the compliance work goes slowly because it is not what they enjoy or are good at, and they leave within a year because the job was not the job they accepted.

Before writing a job description, list the last ten security-related things that consumed your time and sort them into those four buckets. The bucket with the most items is the role you actually need. If it is governance, a fractional CISO covers it from $3,000 a month, and the same money will not buy you a third of a full-time senior engineer.

Who is accountable, and whose name goes on it

The comparison usually gets framed around capability. The question buyers, auditors and insurers actually ask is about accountability. Enterprise security reviews ask who owns your security program. Cyber insurance applications ask for a named individual. Auditors need someone who can attest to how controls operate. Investor diligence asks who is responsible.

Either model can answer this, but only if you set it up deliberately. An outsourced arrangement where a rotating pool of analysts responds to tickets cannot supply a named owner and will be visibly thin the first time a prospect's security team asks a follow-up question on a call. An arrangement with a named fractional executive who sits in those calls can. Similarly, an in-house engineer who is not empowered to say no to a shipping deadline is not really an owner either, they are a person who writes tickets that get deprioritized.

Make this an explicit requirement of whichever route you choose: one named person, known to your buyers, with the authority to escalate to the CEO. The failure state we see most often is a company that spent real money on security and still cannot answer "who owns this" in a customer call. Our note on who owns compliance after readiness covers what that ownership involves day to day.

Structuring an outsourced engagement so it works

The contract determines whether this succeeds more than the provider's skill does. Six things belong in it.

A named individual, not a team alias, with a stated substitute for absence. Defined response commitments that distinguish routine questions from active incidents, because a next-business-day commitment is fine for a questionnaire and useless at 2am. Concrete deliverables with dates rather than an hours allocation, so both sides can tell whether the engagement is working. Explicit inclusion of buyer-facing work, meaning questionnaires, customer security calls and auditor liaison, which is the work that most directly protects revenue and is often quietly excluded. Documentation ownership, stating that policies, risk assessments, evidence and runbooks are yours and are delivered in an editable format you retain on termination. A transition clause describing what handover looks like when you eventually hire internally, because the goal of a good engagement is to make itself replaceable.

Ask a prospective provider what happens when they are wrong, how they handle a finding your team disputes, and how many other clients the named person carries. The last one is the most predictive question in the entire evaluation.

The hybrid nobody names properly

Framing this as a binary hides the arrangement that actually fits most companies between 20 and 80 people. It is not "outsourced plus a champion" in the vague sense. It is a fractional owner who holds the program, a specialist bought per engagement for things nobody should staff full time, and one internal engineer with formally protected time to implement.

Penetration testing is the clearest example of the middle piece. It is a specialist skill, needed once or twice a year, and hiring for it makes no sense at this size; we run it from $1,000 depending on scope. Incident response is the same shape, except the contracts and access have to exist before the incident, which is what a retainer is for. What must be internal is implementation capacity, because no external party will merge your pull requests.

The ratio that works is roughly one day a week of senior external ownership, a defined engineering allocation internally, and specialist work bought against a calendar. Companies that fund the first and third but not the second end up with an excellent roadmap and no progress against it.

When neither answer is buy

If you are under fifteen people, pre-revenue, with no regulated data and no enterprise prospects asking questions, you probably need neither. Turn on multi-factor authentication everywhere, get secrets out of the codebase, enable backups and verify a restore, and put someone's name against security in the org chart. That is a week of work and it covers most of your actual risk at that stage.

If a single deal is driving the urgency, buy the narrowest thing that unblocks it rather than a program. Sometimes that is a fixed-scope readiness engagement, sometimes it is one penetration test, and sometimes it is an hour helping your team answer a questionnaire honestly. We have told prospects to do the last one and go away, because a retainer would have been us billing monthly for a problem that ended in a fortnight.

And if you have already hired a capable internal security lead, do not layer a fractional CISO on top. Two owners is worse than one, the internal person will read it as a vote of no confidence, and you will pay for advisory you already employ. Buy specialist capability from outside instead, and keep the ownership where it is. If you are unsure which of these describes you, describe the situation and we will tell you which one it is, including when the answer is that you do not need us.

Three different products are sold as "outsourced security"

Quotes that look wildly different usually differ because they are not for the same thing. There are three distinct categories and buyers routinely compare across them without noticing.

Managed detection and response is a monitoring product. You send logs, they watch, they call you when something looks wrong. Priced per log volume, per endpoint or per user, so the invoice grows as you grow. It answers "would we notice an intrusion." It does not answer a security questionnaire, write policy, or sit on a call with your prospect's security analyst.

Governance and advisory is what a fractional CISO engagement is. It answers the buyer, the auditor and the insurer, builds the programme and decides what to spend on. It does not watch your logs at three in the morning.

Project work is bought against a defined outcome: a readiness engagement, a penetration test, a cloud review. Fixed scope, fixed price, ends.

Most companies under a hundred people need the second category and go shopping for the first, because monitoring is what the word "security" evokes. Work out which one your actual problem sits in before you collect quotes, or you will hold a $2,500 monitoring subscription next to a $4,000 advisory retainer and conclude the advisory one is expensive.

Making quotes comparable

Ask every provider the same five questions and the spread narrows quickly. What is included versus passed through, because tooling licences billed at cost can quietly double a monitoring bill. How many hours the fee assumes, and what happens in a month that goes over. Who does the work, meaning the seniority of the person on your account rather than the one on the sales call. What the notice period and minimum term are, since a three month notice on a twelve month term is really a fifteen month commitment. And what is explicitly out of scope, which surfaces the usual exclusions: incident response, questionnaire completion, auditor liaison and any environment you did not disclose.

Then normalise to cost per year including your own internal hours, because an engagement that consumes two days a month of your senior engineer's time is not the cheaper one. Our published pricing exists so this comparison is possible before a call rather than after three of them.

Your security vendor becomes your customers' problem too

Whoever you bring in will hold read access to your production environment, your identity provider and your evidence. That makes them a vendor in your own vendor management programme, and enterprise customers will ask about them by name during a security review. Auditors will sample the vendor review you performed on them.

So run the review you would want run on you. Confirm insurance and background checks on the individuals with access. Get a signed agreement covering confidentiality, data handling and breach notification to you within a defined window. Establish where they store your material, because a provider keeping your risk register in an undisclosed jurisdiction creates a data residency answer you did not intend to give. And ask whether they would pass their own assessment. A security firm that cannot evidence its own access controls is telling you something.

Judging the engagement at ninety days

Both models fail quietly, and the founder usually notices at month eight when a deal stalls. Set the check earlier and make it concrete rather than a satisfaction conversation. By the end of the first quarter you should hold a risk register with named owners, a policy set matching how your team actually works, evidence of one control operating over time rather than once, and a questionnaire answered end to end without a founder writing the technical sections. If those four are missing, the problem is structural.

Do not buy monitoring you cannot act on

The clearest waste in this market is a small company paying for round the clock detection with nobody rostered to respond at night. An alert at 2am that lands in a shared inbox and gets read at nine is the outcome you would have had for free, at a cost you are now committed to for a year. Detection is worth the money once someone is contractually obliged to act on it, either your own on-call rotation or a provider with a written response commitment and pre-agreed containment authority.

If your risk is real but your team is small, buy the response capability first and the monitoring second. An incident response retainer puts the contract, the access and the phone number in place before you need them. If neither is affordable yet, spend on the two controls that prevent most of what monitoring would catch: phishing-resistant multi-factor authentication everywhere, and removal of long-lived cloud credentials. Tell us where you actually are and we will say which category you need, including when the answer is none of them.