Mailchimp to Klaviyo Migration · Cardiff
Mailchimp to Klaviyo Migration in Cardiff
Moving Cardiff retailers from Mailchimp to Klaviyo, where the suppression list matters more than the subscriber list. Everyone who has unsubscribed, complained or hard bounced must arrive before the first send — emailing someone who withdrew consent is a legal failure under UK marketing rules, not merely an awkward moment.
Why this comes up
The problem
The subscriber list was imported and the unsubscribe history was left behind in the old platform.
What you get
What we deliver
- Suppression and unsubscribe history migrated before any subscriber data
- Consent records carried across, including when and how permission was given
- Subscribers imported with the engagement history segmentation depends on
- Sending domain authenticated and volumes increased gradually rather than at once
- Flows rebuilt around Klaviyo's event model rather than copied from automations
- Ecommerce data connected, since this is the reason for moving in the first place
Want this scoped for your business in Cardiff?
Thirty minutes, no charge, no sales script. You leave with a written summary of what mailchimp to klaviyo migration would actually involve — whether or not you use us.
Working in Cardiff
Wales
Cardiff has a significant broadcast and media sector alongside a large public-sector presence, and Welsh-language provision is a genuine requirement on public-facing work here rather than a nice-to-have.
Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option.
Sectors we work with in Cardiff
- Media & Broadcasting
- Financial Services
- Public Sector
- Higher Education
- Sport
What we work with
Technologies and platforms
- Klaviyo
- Mailchimp
- Shopify
- REST APIs
Who we work with
Industries we serve
- Retail
- Direct-to-consumer brands
- Health and beauty
- Fashion and apparel
- Food and drink
Why us
Why Cardiff businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in Cardiff
Looking for the full picture? See our Mailchimp to Klaviyo Migration services, everything we do in Cardiff or browse everything we do.
Mailchimp to Klaviyo Migration in Cardiff — common questions
- Why does suppression come first?
- Because sending to someone who opted out breaches UK marketing rules regardless of which platform did it. Importing subscribers without their unsubscribe history means the first campaign reaches people who asked not to hear from you, which is both a complaint and a compliance problem.
- Should we email the whole list immediately?
- No — volumes should build gradually. Receiving providers assess a sending domain partly on its recent behaviour, so a sudden large send from a newly configured setup is treated with suspicion and lands a meaningful proportion of it out of the inbox.
- Can automations be copied across?
- Not directly. Klaviyo's flows are triggered by events rather than by list membership, which is a genuinely different model — so a rebuild that uses that properly produces better results than reproducing a Mailchimp automation step by step.
- Does our consent evidence transfer?
- It needs to, and it is worth checking rather than assuming. Records of when and how each person gave permission are what you rely on if a complaint is ever raised, and a list that arrives without them is one you cannot demonstrate the lawfulness of.
- Do you work with businesses across Cardiff?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout Wales, including Cardiff and the surrounding Cardiff area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of Cardiff businesses do you usually work with?
- Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option. Beyond that we work across Media & Broadcasting, Financial Services, Public Sector, Higher Education and Sport.
- Do you cover the areas around Cardiff?
- Yes — we work throughout Wales, including Bristol, Swansea. Cardiff is an urban area of roughly 490,000+, and we take on work across the wider Cardiff region rather than the city boundary alone.
Talk to us about Mailchimp to Klaviyo Migration in Cardiff
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise