Segment Migration · London
Segment Migration in London
Moving London organisations onto Segment, or away from it as costs rise with the audience. The asymmetry to understand before either direction: the collection layer routes events as they happen and does not hold your history, so a destination connected today receives nothing about what happened yesterday.
Why this comes up
The problem
A collection layer is being adopted or replaced, and it is unclear what happens to the events already sent and the destinations depending on them.
What you get
What we deliver
- Existing event schema documented, since this is what must be reproduced
- Warehouse data secured first, as this is the only durable copy of history
- Destinations migrated individually with verification before the old path is removed
- Replay assessed where a new destination genuinely needs historical events
- Identity mappings preserved, or previously connected users fragment
- A parallel period where both paths run and figures are compared
Want this scoped for your business in London?
Thirty minutes, no charge, no sales script. You leave with a written summary of what segment migration would actually involve — whether or not you use us.
Working in London
London
London clients usually come to us because they want senior people actually on their project rather than a large agency's B team, and because Midlands rates buy considerably more delivery per pound.
Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates.
Sectors we work with in London
- Financial Services
- Professional Services
- Technology
- Media
- Hospitality
- Retail
What we work with
Technologies and platforms
- Segment
- BigQuery
- Node.js
- RudderStack
Who we work with
Industries we serve
- Technology and SaaS
- E-commerce
- Media and publishing
- Financial services
- Travel
Why us
Why London 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 London
Looking for the full picture? See our Segment Migration services, everything we do in London or browse everything we do.
Segment Migration in London — common questions
- Does history come with us?
- Not by default. A collection layer forwards events as they occur; it is a pipe rather than a store. Whatever landed in your warehouse is the durable record, and destinations connected after the fact start from empty unless events are deliberately replayed.
- Why do organisations leave?
- Cost, usually, since pricing follows tracked users and rises with success. Alternatives and self-hosted options exist at lower cost with more engineering effort, and that trade is the actual decision rather than any difference in capability.
- Should both run in parallel?
- For a period, yes. Sending to both paths and comparing destination figures is the only reliable way to confirm the new implementation is complete. Cutting over on the assumption that a matching schema means matching data is how discrepancies get discovered a month later.
- What breaks most often?
- Identity. Anonymous-to-known mappings built up over years do not transfer cleanly, and a migration that loses them turns returning customers into new visitors. Establishing how the destination handles this before moving prevents an unpleasant analytics discontinuity.
- Do you work with businesses across Greater London?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout London, including London and the surrounding Greater London area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of London businesses do you usually work with?
- Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates. Beyond that we work across Financial Services, Professional Services, Technology, Media, Hospitality and Retail.
- Do you cover the areas around London?
- Yes — we work throughout London, including Reading, Milton Keynes, Cambridge, Brighton. London is an urban area of roughly 9,000,000+, and we take on work across the wider Greater London region rather than the city boundary alone.
Talk to us about Segment Migration in London
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