Moving away from a SaaS product is not a simple data download. The service may provide workflows, permissions, automation, integrations, reporting and operational support that must be replaced or deliberately retired.
A transition plan should begin while the current service is stable and before contractual notice reduces the available time.
Define the target state
Decide whether the organisation is:
- moving to a competing SaaS platform;
- replacing the service with a custom system;
- consolidating the process into an existing platform;
- closing the process and retaining an archive only.
Each route has different data, integration and operating requirements.
Map what the SaaS product actually does
| Capability | Transition question |
|---|---|
| Data capture | Which fields, validation rules and identifiers must be recreated? |
| Workflow | Which statuses, approvals, reminders and exceptions exist? |
| Permissions | How are roles, teams, customers and external users represented? |
| Automation | Which scheduled jobs, messages and calculated values run? |
| Integrations | Which systems depend on APIs, webhooks, files or shared identity? |
| Reporting | Which operational and historical reports are required? |
| Support | Which vendor services must be replaced internally or externally? |
Inspect export capability before committing
Request and test exports early. Confirm whether they include:
- stable identifiers;
- relationships between records;
- attachments and original filenames;
- comments, audit history and timestamps;
- configuration and custom fields;
- user and permission mappings;
- deleted, archived or inactive records where required.
A CSV of visible fields may not be sufficient to reconstruct the process.
Design migration and reconciliation
Document source-to-target mappings, transformation rules and ownership of data cleansing. Run test migrations using representative volumes and difficult records. Reconcile not only record counts but also totals, relationships, permissions and business reports.
Keep a controlled record of exceptions and the decision for each one.
Replace integrations deliberately
For every integration, identify:
- source and destination;
- data and frequency;
- authentication method;
- failure handling and retry behaviour;
- cutover owner;
- monitoring after transition.
Do not disable the old route until the new route has been validated and duplicate processing is controlled.
Plan user and customer change
Users may lose familiar screens, saved views or historical shortcuts. Prepare role-based training, new access instructions and clear support routes. For customer-facing portals, communicate expected downtime, changed URLs and actions users must take.
Use parallel running selectively
Parallel operation can reduce risk for financial, case-management or other critical processes, but it creates duplicate work and reconciliation effort. Define:
- which transactions are entered in each system;
- which system is authoritative;
- how differences are resolved;
- how long parallel running will last;
- the evidence required to stop it.
Prepare for vendor failure or reduced cooperation
Obtain exports, documentation and account information before they become urgent. Maintain independent records of the contract, administrator contacts, integration configuration and renewal dates. If the vendor announces closure or service withdrawal, prioritise data preservation and business continuity.
Decommission the old service
After migration, check for remaining users, integrations, scheduled jobs, charges and retained data. Confirm the required return or deletion of personal information where the vendor acts as a processor, subject to lawful retention requirements.
Align the plan with the contract calendar
Record renewal, notice, price-change, export and deletion dates. Work backwards from a safe cutover date that leaves time to validate the final export while the old service is still accessible. Include any charges for extended access, custom extraction or transition assistance.
Do not serve notice before confirming that the target platform, migration team and decision owners can meet the timetable.
Decide what history to migrate
Not every record must move into the new operational system. Some history may be retained in a secure searchable archive if that meets business, legal and regulatory needs. Define which records remain active, which are archived and how authorised users retrieve evidence after the old platform closes.
Test a representative export
Run a sample export and attempt to recreate one complete business case in the target system, including attachments, history, permissions and reporting. The gaps found will be more useful than a generic migration estimate.