Launch Ready cyber security Checklist for founder landing page: Ready for first 100 users in bootstrapped SaaS?.

What "ready" means for a founder landing page

For a bootstrapped SaaS aiming at the first 100 users, "launch ready" means a stranger can visit your domain, trust the page, sign up, and get a response without your stack leaking data or falling over.

I would call it ready only if these are true: the domain resolves correctly, HTTPS is enforced, email authentication passes SPF, DKIM, and DMARC, no secrets are exposed in the frontend or repo, forms submit reliably, uptime is monitored, and a bad deploy can be rolled back in minutes. If any one of those fails, you are not ready for paid traffic, Product Hunt traffic, or even a small founder-led outbound campaign.

The goal is not just a pretty page; it is to reduce launch risk so your first 100 users do not become your first 100 support incidents.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | Domain points to the right app | Root and www resolve correctly | Users and ads must land on the right page | Lost traffic, broken sharing links | | HTTPS enforced | No HTTP access; SSL valid | Protects login and form data | Browser warnings, trust loss | | Redirects clean | One canonical URL only | Avoids duplicate content and tracking issues | SEO dilution, broken analytics | | SPF passes | Email sender authorized | Prevents spoofing and deliverability issues | Emails land in spam | | DKIM passes | Mail signed correctly | Proves message integrity | Lower inbox placement | | DMARC passes with policy | Reporting enabled; policy at least quarantine later reject-ready | Stops domain abuse | Phishing risk, brand damage | | No exposed secrets | Zero API keys in code or client bundle | Prevents account takeover and billing abuse | Data leaks, stolen credentials | | Forms validated server-side | Invalid input rejected on backend | Stops abuse and injection paths | Spam, broken CRM sync | | Monitoring active | Uptime alert within 5 minutes of failure | You need to know before users complain | Silent downtime | | Deploy rollback exists | Previous release restorable fast | Reduces launch blast radius | Long outages after bad deploy |

The Checks I Would Run First

1. Domain and redirect hygiene

Signal: `example.com`, `www.example.com`, and any campaign subdomain all resolve to one intended destination with a single canonical URL.

Tool or method: DNS lookup, browser test, Cloudflare dashboard review, and curl checks for redirect chains.

Fix path: I would point A or CNAME records correctly, then set one canonical host and force every other variant into a single 301 redirect. If you have multiple landing pages or old beta URLs floating around, I would map them before launch so you do not split trust or analytics.

2. TLS and certificate enforcement

Signal: Every public page loads over HTTPS with no mixed content warnings.

Tool or method: Browser security tab, SSL Labs test, Cloudflare SSL settings.

Fix path: I would enable full strict SSL where possible, force HTTPS at the edge, and remove any images, scripts, or embeds still calling HTTP assets. Mixed content is not cosmetic; it creates browser warnings that kill conversion on mobile.

3. Secret exposure audit

Signal: No API keys, private tokens, webhook secrets, or admin endpoints are visible in source maps, frontend bundles, Git history snapshots shared publicly, or environment files committed by mistake.

Tool or method: Repo scan with secret detection tools plus manual review of build output and browser network requests.

Fix path: Move all sensitive values into environment variables on the server side only. Rotate anything already exposed immediately. If a key has been public even briefly, I treat it as compromised until proven otherwise.

Short config example:

NEXT_PUBLIC_ = never use this for secrets
STRIPE_SECRET_KEY=sk_live_xxx
RESEND_API_KEY=re_xxx
DATABASE_URL=postgresql://...

4. Form security and validation

Signal: Signup/contact forms reject malformed input server-side and do not trust client-side checks alone.

Tool or method: Submit empty payloads, long strings, script tags, duplicate emails, invalid phone numbers, and rapid repeated requests.

Fix path: I would validate every field on the backend with strict schemas. Then I would add rate limiting and bot protection so your first 100 users are real people instead of spam submissions that pollute your CRM.

5. Email authentication setup

Signal: SPF passes for your sender domain; DKIM signs outbound mail; DMARC reports show alignment.

Tool or method: MXToolbox checks plus test sends to Gmail and Outlook.

Fix path: I would configure SPF to include only approved senders like Google Workspace or Resend. Then I would enable DKIM signing and set DMARC to monitor first if you are new to email auth. Without this setup, welcome emails often disappear into spam right when users try to activate accounts.

6. Monitoring and rollback readiness

Signal: Uptime alerts fire within 5 minutes; deployment can be reverted quickly without guessing.

Tool or method: Uptime monitoring service check plus deployment history review.

Fix path: I would set health checks for the homepage and any signup endpoint. Then I would make sure there is a known-good previous release stored in the platform so rollback is one click instead of a midnight debugging session.

Red Flags That Need a Senior Engineer

If you see any of these, DIY becomes expensive fast:

1. You have shipped from Lovable, Bolt Cursor output v0 code with no production review. That usually means hidden auth assumptions, weak error handling, or client-side-only security logic.

2. Your landing page uses third-party scripts you cannot explain. Every extra script increases attack surface and can leak form data through analytics pixels or chat widgets.

3. Your app has signup but no rate limiting. A bot can burn your email quota in minutes and flood your inbox before your first user signs up.

4. You are sending emails from a custom domain but have never checked SPF/DKIM/DMARC. That is how founders end up with onboarding emails failing silently while they think product-market fit is the issue.

5. You cannot answer where secrets live. If API keys are scattered across local files, frontend code comments, Vercel vars you did not audit carefully enough to name them later fix them now before launch traffic exposes them further.

DIY Fixes You Can Do Today

These are safe moves you can make before asking me to take over:

1. Verify your domain ownership in Cloudflare. Make sure DNS records match the actual deployment target and delete old beta records that no longer serve a purpose.

2. Turn on HTTPS redirect. Force all traffic to the secure version of the site so you do not split users across two hosts.

3. Audit your environment variables. Remove anything sensitive from frontend prefixes like `NEXT_PUBLIC_` unless it is truly public data such as an analytics ID.

4. Test your signup flow with three different email providers. Use Gmail plus Outlook plus one company domain if possible so you catch deliverability problems early.

5. Add basic uptime monitoring now. Even free monitoring is better than finding out about downtime from an angry user on X at 2 am.

Where Cyprian Takes Over

Here is how I map common failures to Launch Ready deliverables:

| Failure found in audit | Service deliverable used | Timeline inside 48 hours | |---|---|---| | Domain misconfigured or pointing wrong place | DNS setup + subdomain routing + redirects | Hours 1-6 | | Mixed content or weak SSL setup | Cloudflare + SSL hardening + HTTPS enforcement | Hours 1-8 | | Slow page due to unoptimized assets or heavy scripts | Caching + edge configuration + asset cleanup guidance | Hours 6-16 | | Exposed secrets or unsafe env handling | Secrets review + environment variable cleanup + rotation plan | Hours 6-18 | | Email deliverability failing SPF/DKIM/DMARC checks | Email auth setup + verification tests + handover notes | Hours 8-20 | | Broken deploy process or risky release state | Production deployment + rollback checklist + handover checklist | Hours 12-36 | | No visibility after launch happens once users arrive? Sorry this seems incomplete please continue just one more sentence? Wait need final article complete let's craft ending properly |

• I wire DNS correctly.
• I enforce redirects and canonical hosts.
• I configure Cloudflare protection.
• I verify SSL end-to-end.
• I harden caching where it helps performance without breaking auth flows.
• I set SPF/DKIM/DMARC so your outbound mail has a real chance of reaching inboxes.
• I deploy production safely with environment variables handled properly.
• I remove exposed secrets risk as far as the stack allows.
• I add uptime monitoring so failures are visible fast.
• I hand you a checklist you can actually use after handoff.

My opinionated rule: if any check touches identity boundaries - login state,, email delivery,, secrets,, payments,, admin access - do not improvise under launch pressure. That is where founders accidentally create support load that costs more than the sprint itself within the first week of traffic.

References

• roadmap.sh cyber security best practices: https://roadmap.sh/cyber-security
• roadmap.sh API security best practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh code review best practices: https://roadmap.sh/code-review-best-practices
• Cloudflare SSL/TLS documentation: https://developers.cloudflare.com/ssl/
• Google Workspace email sender guidelines for SPF/DKIM/DMARC: https://support.google.com/a/topic/2753860

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*