Many companies keep a dedicated ATS (Greenhouse, Welcome Kit) upstream of Illizeo, or a legacy HRIS (Workday, SAP SuccessFactors) to sync. Illizeo offers the connectors and mapping logic to make these systems coexist.
Coexistence strategies #
| Strategy | Benefit | Risk |
|---|---|---|
| ATS upstream → Illizeo | Keeps recruiting expertise | Possible duplicate input |
| Illizeo single source | Single truth | Loss of ATS-specific features |
| Coexistence with sync | Best of breed | Governance complexity |
| Progressive migration | Controlled risk | Long hybrid period |
Step-by-step #
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Identify source of truth #
For each field (name, email, contract, salary), designate the system with priority. Avoids conflicts.
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Configure sync direction #
One-way (ATS → Illizeo) or two-way (Illizeo ↔ SAP). Depending on your architecture.
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Map fields #
Business fields → Illizeo fields. Mapping includes contract types, seniority levels, departments.
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Set frequency #
Real time (webhook) for critical changes, nightly batch for bulk.
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Monitor drifts #
The Sync Health report lists divergent records and offers resolution.
Supported ATS / HRIS connectors #
| Type | Tools |
|---|---|
| Recruitment ATS | Greenhouse, Lever, Welcome Kit, Lucca, Teamtailor |
| Legacy HRIS | Workday, SAP SuccessFactors, Cornerstone |
| Specialised payroll | Sage, Cegid, ADP, Silae |
| Performance / Reviews | Lattice, 15Five, Culture Amp |
| Learning / LMS | 360Learning, EdCast, Cornerstone Learning |
FAQ #
What in case of conflict?
The priority system wins. Conflict logged for manual review.
Historical data?
One-off migration at go-live. Scope flexible (3, 5, 10 years).
Cost?
Marketplace connectors: included. Premium connectors (Workday, SAP): annual fee.
Latency?
Webhook: < 200ms. Batch: schedulable. Real-time where needed.
