The fear behind most "should we migrate off HubSpot/Webflow" conversations isn't really about WordPress, it's about what breaks in the move: rankings, marketing automation, content nobody remembered still existed until it 404s. Those fears are reasonable, migrations done carelessly do break exactly these things. Done properly, none of it is inevitable, it's a matter of specific, plannable steps.
What Actually Happens, Not in Marketing-Speak
A full content and URL audit, first. Every existing page gets catalogued: what it is, how much traffic it gets, and where it's going to live on the new site. This is also where a genuinely outdated page, one that's been quietly irrelevant for two years, gets identified as worth retiring rather than migrating forward.
A redirect map for every single URL, no exceptions. Each existing URL gets mapped to its WordPress equivalent with a 301 redirect. This is the single highest-stakes piece of the whole process, a missed URL doesn't announce itself, it just quietly stops ranking and the traffic loss often isn't noticed for weeks.
Content rebuilt natively, not copy-pasted. Especially from HubSpot or Webflow, content needs to be rebuilt in WordPress's own structure, not dumped in as raw HTML, so it actually benefits from the new content model rather than just existing as a static artifact that happens to render.
A parallel build, tested before anyone sees it. The new WordPress site runs on staging, fully tested, content-complete, integrations working, while the old site keeps serving live traffic normally. Nothing goes live until the new build has actually been checked, not assumed to work.
A planned DNS cutover. With proper pre-warming, the switch from old platform to new is a matter of minutes of propagation, not hours of downtime. This is a solved problem technically, it just needs to be planned rather than rushed.
Where the Real Risk Sits
Almost every migration horror story traces back to one of two things: an incomplete redirect map, or marketing automation that nobody planned for during the move. On the redirect side, the fix is discipline: every URL accounted for, none assumed to not matter. On the automation side, particularly for a HubSpot CMS migration specifically, the CRM and marketing automation don't have to move with the CMS, but the plan for where they'll live needs to be explicit from the start, not improvised after the content migration is already underway.
A question worth asking any agency proposing your migration directly: "How do you find every URL that currently exists, including ones that might not be in the main navigation?" A thorough answer references crawling the live site, checking Search Console's indexed pages, and reviewing analytics for traffic to URLs that might otherwise be missed. A vague answer here is where redirect gaps come from.
What to Expect Timeline-Wise
A standard migration, tens of pages, blog content, forms, and basic integrations, typically runs 6 to 10 weeks. Larger migrations with complex content models or deep integrations extend to 10 to 16 weeks. Rankings and traffic are typically monitored for 60 days post-launch specifically to catch and fix any regression fast, rather than assuming the redirect map was perfect and moving on.
FAQ
What's the biggest risk in a WordPress migration?
Lost SEO rankings from an incomplete redirect map. Every URL on the old platform needs a mapped 301 redirect to its WordPress equivalent, and any URL that's missed becomes a dead link losing whatever ranking and link equity it had built up, sometimes silently, since the traffic loss doesn't show up until weeks later in Search Console.
Can marketing automation and lead scoring survive a migration off HubSpot?
Yes, if it's planned deliberately rather than assumed. HubSpot's CMS and CRM are tightly coupled, so a migration to WordPress needs an explicit plan for where marketing automation and lead scoring will live going forward, whether that's keeping HubSpot as the CRM with WordPress as the CMS, or moving the automation logic to a new platform entirely.
How much content actually needs to be touched during a migration?
All of it needs to be accounted for, even if most of it moves with minimal changes. A content audit at the start of the project identifies what migrates as-is, what needs restructuring to fit the new content model, and what's genuinely outdated and worth retiring rather than migrating, which is usually a meaningful share of any site more than a few years old.
Is it possible to migrate without any downtime?
Yes. The new site is built and fully tested in a staging environment while the current site keeps running normally, and the cutover itself is a DNS switch that, with proper pre-warming, typically causes no visible downtime, a brief propagation window at most, not an outage.