How Web Agencies Can Add Security Audits as a Service (and Earn More)

How Web Agencies Can Add Security Audits as a Service (and Earn More)

Most web agencies leave money on the table at the end of every project. The website is built, the handoff is done, and the invoice is closed. A security audit — a service most clients need but few proactively request — is one of the easiest and highest-margin additions to an agency''s service catalog.

This guide covers the business case, how to pitch it, what to include in an audit package, how to price it, and how to deliver it efficiently using white-label tools that make the audit look and feel like a premium agency service.

The Business Case

Why Security Audits Are a Natural Agency Upsell

You already have your client''s trust, access to their website, and understanding of their technical stack. Adding a security audit to the project scope is not a departure from your existing relationship — it''s an extension of it.

Clients do not typically think to ask for security audits. They trust that if you built the site, it''s secure. This creates an opportunity: being the agency that proactively identifies security gaps positions you as a genuine partner rather than just a builder.

The client perception matters here. An agency that says "by the way, we ran a security audit on the site we built for you and found three things worth addressing" is delivering value that most clients have never received from a web agency. That positions you above agencies that simply deliver and disengage.

The Revenue Numbers

A security audit service structured correctly adds $200-500 per project with 2-4 hours of actual work, once you have a repeatable process. If you close 20 projects per year, that''s $4,000-$10,000 in additional revenue from an existing client base — before considering monthly monitoring retainers.

Monthly monitoring retainers at $50-150/mo per client are the real opportunity. Ongoing security monitoring is a service clients need but can''t easily do themselves. With ZeriFlow''s Business plan at €19.99/mo covering unlimited scans, monitoring a portfolio of 10-15 clients under a single plan is economically compelling.

Revenue model example: - Initial audit per project: $300 - Monthly monitoring retainer: $75/mo per client - 15 active monitoring clients: $1,125/mo recurring - Annual impact: 20 project audits ($6,000) + 15 monitoring clients ($13,500) = $19,500 additional revenue

The Pitch

How to Introduce Security Audits

The mistake most agencies make when pitching security: they talk about technical details the client doesn''t understand and doesn''t care about. Words like "Content-Security-Policy," "HSTS misconfiguration," and "TLS cipher suites" land with most business owners as noise.

The language that works:

Liability framing: "Before we hand this site over to you, we want to make sure there are no security gaps that could expose your customers'' data or get your site flagged by browsers. We can run a full security audit and give you a report — most agencies don''t do this, but we think it''s part of doing the job right."

Reputation framing: "A site that looks professional but has security warnings or shows your customers'' browsers red flags can damage trust more than almost anything else. A quick audit lets us make sure that doesn''t happen."

Compliance framing (for e-commerce clients): "For e-commerce sites processing payments, payment processors and card networks expect a certain level of security compliance. We can run an audit and give you documentation showing the site meets those requirements."

Who to Pitch

Not every client needs the full pitch. Prioritize:

• E-commerce clients — PCI DSS relevance makes security a business requirement
• Professional services firms (law, accounting, healthcare) — client data protection matters to their clients
• SaaS or technology companies — often have existing security requirements from customers or investors
• Any client who mentioned compliance, certifications, or enterprise sales — security documentation will be asked for

Lower priority: - Simple brochure sites with no user accounts and no payment processing - Clients who explicitly don''t want to spend more

Handling Objections

"Isn''t the site already secure because you built it?" "Our development work absolutely follows best practices, but security also depends on the hosting environment, server configuration, how the CDN is set up, and dozens of runtime factors we can only see once it''s deployed. The audit verifies everything looks right in production, not just in development."

"Can we add this later?" "It''s significantly easier to address security findings before launch than after — especially if any changes affect how cookies or headers are set, which can affect the user experience. We''d recommend doing it as part of the launch process."

"I don''t have budget for it right now." Include the basic audit in your project price from the start. Charge a flat add-on for the detailed PDF report and remediation work. Running the scan itself is minimal cost.

What to Include in a Security Audit Package

Tiered Packages

Basic Security Check ($150-200): - Automated scan of the production URL - Summary report covering headers, SSL, cookies, and key findings - 3-5 specific recommendations with explanation - Delivered as a 2-page PDF summary

Full Security Audit ($300-500): - Automated scan with full results - Manual review of audit findings - White-label PDF report with your agency branding - Priority ranking of findings (critical/high/medium/low) - Remediation guidance for each finding - Post-remediation verification scan - 1-hour video call to walk through results

Security Monitoring Retainer ($50-150/mo): - Monthly automated scans - Email alerts if security score drops - Quarterly security report - Annual comprehensive audit

The White-Label PDF Report

The PDF report is the artifact that justifies the audit fee. It''s tangible, brandable, and useful to the client beyond the initial conversation.

ZeriFlow''s Business and Unlimited plans generate white-label PDF reports that can carry your agency''s logo, branding, and contact information rather than ZeriFlow''s. The client receives a professional security document that looks like your agency produced it from scratch.

A well-formatted audit PDF typically includes: - Executive summary (one paragraph the business owner can read) - Overall security score with context - Category-by-category breakdown (headers, SSL, cookies, content) - Finding detail: description, risk level, and recommended fix - Comparison to industry benchmarks - Recommended next steps

The executive summary is the most important part. Clients forward it to their technical team or their own clients. Keep it readable by a non-technical person.

The Delivery Process

Step 1: Run the Automated Scan

Use ZeriFlow''s full scan on the production URL once the site is deployed and DNS is pointing correctly. The scan runs 80+ checks in about 60 seconds and returns a /100 score.

# If using ZeriFlow''s API (Pro and above)
curl -X POST https://api.zeriflow.com/v1/scans \\
  -H "Authorization: Bearer YOUR_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d ''{"url": "https://clientsite.com", "full_scan": true}''

Review the results before sharing them. Understand what each finding means so you can explain it if the client asks.

Step 2: Contextualize the Findings

Not all findings require immediate action. Part of your value as an agency is helping clients understand what actually matters:

Critical / High: Security gaps that represent real attack vectors — missing HTTPS, expired SSL, cookies without Secure flag on a site with authentication, critical headers absent. These should be addressed before launch or immediately after.

Medium: Configuration improvements that reduce attack surface — missing Permissions-Policy, X-Content-Type-Options absent. Recommend addressing but not urgent.

Low / Informational: Nice-to-have hardening — Server header removing version information, additional CSP directives. Document in the report but deprioritize.

Step 3: Generate the White-Label PDF

ZeriFlow''s Business plan includes white-label PDF generation. Configure your agency''s logo, name, and color scheme in the ZeriFlow dashboard. The exported PDF replaces all ZeriFlow branding with yours.

Add your executive summary at the top of the report before sending it to the client.

Step 4: Present the Findings

A 30-minute screen share to walk through the report is worth including in your package. It''s also a sales opportunity: the findings naturally lead to a conversation about remediation work and ongoing monitoring.

Pricing Models

Project-Based (Flat Fee)

Simplest to sell. The audit is a fixed line item in your project quote:

Percentage of Project Value

Add 10-15% to project quotes as a security audit fee. This scales automatically with project size — a $1,500 brochure site adds $150, a $5,000 e-commerce build adds $500-750.

Retainer (Monthly Recurring)

Monthly monitoring is the highest-margin model because ZeriFlow''s monitoring is automated — it runs without your involvement and alerts you only when something changes.

Position it as "we watch your security so you don''t have to." For clients who just spent $5,000 on a website, $75/mo to protect that investment is an easy sell.

Operating at Scale with ZeriFlow

ZeriFlow''s Business plan (€19.99/mo) and Unlimited plan (€49/mo) are designed for multi-site operation:

• Unlimited scan history — all client scans stored and comparable over time
• White-label PDF — client reports carry your brand
• REST API — automate scanning across your client portfolio
• Monitoring per domain — set up monitoring for each client property and receive alerts when scores change
• CI/CD hooks — for clients whose sites you continue to maintain, integrate security checks into their deployment pipeline

The economics work: ZeriFlow Unlimited at €49/mo covers unlimited sites. If you bill 10 clients $75/mo for monitoring, you net $750 - €49 = approximately $700/mo with no additional per-client cost.

Building This Into Your Agency Process

The smoothest implementation: add security audits to your standard project checklist as a non-optional step in your pre-launch process. Run the scan, fix what you find, and include the audit report in the project handoff package.

This approach: 1. Requires no sales conversation — it''s part of your standard work 2. Produces a client-facing deliverable (the PDF) that demonstrates thoroughness 3. Reduces your liability — if a client''s site gets compromised and you can show you ran a pre-launch security audit and addressed the findings, that''s documented due diligence 4. Builds a monitoring upsell opportunity into every handoff conversation

Most agencies that add security services find that clients rarely decline the monitoring retainer when the initial audit reveals findings — and it almost always does.

Start by running a free scan on one of your existing client sites at zeriflow.com/free-scan. The results will show you exactly what a paid audit would surface — and give you a clear picture of the value you''d be delivering.