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The CRO Checklist for
early-stage founders.

98 battle-tested CRO items across landing pages, hero sections, pricing, signup forms, onboarding, mobile, and analytics. Tick them as you go — progress is saved locally to this device.

Built from the 548-hack library at Startup Growth Hacks. Some items link to a deeper hack with the full playbook, real examples, and recommended tools.

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🎤 Customer research

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The CRO insight that beats every heatmap: read what customers actually say. Most teams skip this and fix the wrong page.

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Frequently asked questions

What is CRO (conversion rate optimisation)?

CRO is the systematic process of increasing the percentage of website visitors who complete a desired action — signing up, booking a demo, or buying. For early-stage startups, CRO usually means iterating on landing pages, signup forms, pricing, and onboarding flows based on data, not opinions.

What's a good conversion rate for a startup landing page?

It depends on traffic intent and offer. Cold paid traffic to a B2B SaaS landing page typically converts 1-3% to free trial signup. Warm organic traffic can hit 5-15%. Email-list traffic 10-30%. Don't compare against industry averages — compare against your own baseline week-over-week.

How long does CRO take to show results?

Low-effort tests (CTA copy, button color, headline) can show signal in 7-14 days if you have at least a few hundred conversions per variant. Higher-effort changes (full onboarding redesigns, pricing structure) need 30-60 days for a confident read. Don't call winners before you have statistical significance (95%+ confidence, 1000+ events per arm).

Which CRO tools should an early-stage startup use?

Start with three: an analytics tool (PostHog or Plausible for events, GA4 for paid attribution), a session-recording tool (Microsoft Clarity is free, Hotjar for more depth), and an experimentation framework (PostHog Experiments is bundled, or GrowthBook self-hosted). Skip enterprise tools like Optimizely until you have meaningful traffic.

What's the single highest-impact CRO change for most startups?

Rewriting the headline. Specifically: making it benefit-led instead of feature-led, and making sure a stranger can describe your product after 5 seconds of looking at the page. Headline tests routinely lift conversion 10-30%. After that, the next-highest leverage is usually the CTA copy and removing fields from the signup form.

Do I need a CRO tool to run this checklist?

No. You can complete 80% of this checklist with just your eyes, a phone for mobile testing, and free tools like PageSpeed Insights and Microsoft Clarity. The remaining 20% (A/B testing, advanced personalisation) only matters once you have at least 1,000 weekly visitors.

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