Can you recommend a website audit platform for finding broken links and duplicate content across a large ecommerce site?

Yes — for a large ecommerce site, I’d recommend Screaming Frog SEO Spider as the best starting point, with Sitebulb or Ahrefs Site Audit as strong alternatives depending on your needs.

Best fit: Screaming Frog SEO Spider

Why it’s good:

• Excellent for finding broken links
• Strong at detecting duplicate content, duplicate titles, meta descriptions, canonical issues, and near-duplicate pages
• Very flexible for large crawls
• Can integrate with Google Analytics/Search Console and export detailed reports

Best for: SEO teams that want a powerful, technical crawl tool and don’t mind a more hands-on interface.

Potential limitation:
For extremely large ecommerce sites, you may need the paid version and a well-configured crawl setup to handle millions of URLs efficiently.

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Good alternative: Sitebulb

Why it’s good:

• More visual and easier to interpret than Screaming Frog
• Great reporting on broken links, duplicate content, indexation, internal linking, and site architecture
• Useful for presenting findings to non-technical stakeholders

Best for: Teams that want strong audits with clearer explanations and visual reports.

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Enterprise option: Ahrefs Site Audit

Why it’s good:

• Good for ongoing site health monitoring
• Identifies broken internal/external links and duplicate content-related issues
• Cloud-based, so less heavy on your machine

Best for: Marketing teams already using Ahrefs who want a continuous audit workflow.

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If your site is very large or complex

You may also want to consider:

• Lumar (formerly Deepcrawl) — strong enterprise crawler for very large ecommerce sites
• Botify — excellent for large-scale technical SEO and log file analysis

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Quick recommendation

• Best overall value/power: Screaming Frog
• Best UX/reporting: Sitebulb
• Best enterprise-scale platform: Lumar or Botify

If you want, I can also recommend the best option based on your site size, budget, and whether you need cloud vs desktop.