What happens to my data when I replace a SaaS tool with a custom system?
Your data is migrated before you switch, not after. We export your records from the old tool, transform them into the new data model, and run a full parallel test period where your team can verify the new system against the old one. Only when you are satisfied do we cut over. The old tool keeps running throughout, so your team is never operating blind. After cutover, your data lives on your own isolated instance, exportable anytime: yours permanently, with no vendor holding it.
Side-by-side comparison
| Staying on the SaaS | Replacing it: your own system | |
|---|---|---|
| Where your data lives | Vendor servers: accessed on their terms, exported in their format | Your own isolated instance: your database, your format, exportable anytime |
| During the build | No change: your data stays on the SaaS as normal | We build the new data model and migrate your data before go-live |
| Migration risk | Not applicable | Low: we run old and new in parallel and verify before cutover |
| What is migrated | Not applicable | All records, history, attachments, user accounts, templates, and configurations |
| If you stop paying the SaaS | Access gone immediately; export window often time-limited | Irrelevant, your data is already on your own system |
| GDPR / EU data residency | Depends on the vendor: US hosting is common | EU data residency by default: encryption in transit and at rest, daily backups |
| Perpetual access | Gone if you stop paying | Perpetual, escrow-backed licence: your access is contractually protected even if we ever stop trading |
Related questions
We use whatever export format the old tool supports: CSV, JSON, API export, and transform it into the new system's data model. Your records look the same in the new system as they did in the old one, plus any structural improvements you have asked for.
Sources
- Rollout IT data migration practice (50+ project migrations, 2018–2025)
- GDPR Article 20: Right to data portability
- Rollout IT build scope documentation
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