KeystoneMigrate: Insurance Migration Control for insurance platform migration.
Plan, execute, and evidence your migration with a system that understands insurance data – not just tables and columns.
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Plan
Programme Overview: Your migration command centre with real-time progress, gate status, and key metrics at a glance.
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Run
Migration Timeline: Every event, dependency, and milestone across all workstreams — with real-time progress tracking.
Mapping Workbench: Source-to-target field mappings with criticality, coverage tracking, and AI-powered suggestions.
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Prove
Gates & Approvals: Structured sign-off workflow ensuring every stakeholder approves before cutover.
Why insurance migrations fail.
It's not a technology problem. It's a domain model problem.
Data model complexity
Insurance data doesn't fit in neat rows and columns. A single commercial policy can have dozens of endorsements, each modifying coverage terms retroactively. Facultative reinsurance placements create dependency chains across books. Delegated authority agreements introduce third-party data flows that your migration tool doesn't know about. Generic ETL tools see tables. Keystone sees the business logic.
Volume and variety
Mid-market carriers migrate millions of policies. But it's not volume that breaks migrations – it's variety. A standard motor book migrates cleanly. A complex commercial specialty book with surplus lines, multi-year treaties, and binder arrangements? That's where generic tools fail and manual reconciliation starts consuming underwriter hours.
Regulatory constraints
You can't pause in-flight claims during a migration. You can't freeze bordereaux reporting to Lloyd's while you move data. You can't tell your regulator that reserve calculations are 'temporarily unavailable.' Insurance migrations must maintain business continuity while transforming the underlying platform.
People impact
Migrations don't just affect systems. Underwriters lose confidence when the data they rely on changes. Actuaries question reserve calculations on migrated books. Brokers get frustrated when quotes take longer because the new system hasn't been properly mapped. Everyone is impacted, and everyone has veto power.
How KeystoneMigrate works.
Plan: Understand what you're actually migrating.
Before we write a single migration rule, we build a complete model of your book. Not the data dictionary version – the reality. Every policy class, every endorsement type, every exotic rider. We interview your underwriters to understand the business logic that isn't documented. We map the exceptions that your current system handles in batch jobs nobody remembers writing.
What the customer gets:
A migration blueprint validated by your business. Your underwriters confirm 'yes, that's how our book actually works.' Your actuaries confirm the reserve calculation logic. Your compliance team confirms the regulatory touchpoints.
Evidence:
- •Blueprint sign-off document
- •Business rule catalogue
- •Data model comparison (source vs target)
How KeystoneMigrate works.
Run: Execute in your environment, not ours.
KeystoneMigrate runs in your data platform (Databricks, Snowflake, Fabric, or similar). Your policy data never crosses your security perimeter. We execute the migration in parallel with your live system – no downtime, no disruption to BAU operations. Every record is mapped, validated, and reconciled against the source system.
What the customer gets:
Real-time visibility into migration progress. Validation reports at every checkpoint. Anomaly alerts when records don't reconcile. Your team can monitor everything – no black box.
Evidence:
- •Checkpoint validation reports
- •Anomaly resolution logs
- •Data lineage trail for every migrated record
How KeystoneMigrate works.
Prove: Evidence that it worked, before you cut over.
Before cutover, we run full reconciliation across the entire book. Not a sample – every policy. Endorsement chains are verified. Reserve calculations are re-derived and compared. Bordereaux outputs are generated and matched against source. Your actuaries get reconciliation packs. Your compliance team gets audit evidence. Your regulator gets the documentation they need.
What the customer gets:
Confidence. Not hope. Verified evidence that every record migrated correctly, every calculation reconciles, and every regulatory obligation is met.
Evidence:
- •Full-book reconciliation report
- •Regulatory evidence pack
- •Actuarial sign-off documentation
- •Board-ready migration completion summary
Built for insurance. Not adapted for it.
Policy data model awareness
Keystone understands insurance data models natively. Endorsement chains, retroactive adjustments, multi-year binders, delegated authority overlays. Not as custom configuration – as core capability.
Endorsement chain reconciliation
Every endorsement in the chain is mapped, validated, and reconciled against the source. When endorsement 47 modifies the terms set in endorsement 12, Keystone traces the full chain and verifies the net coverage position.
Bordereaux validation
Migrated data must produce clean bordereaux from day one. Keystone validates bordereaux outputs against source system outputs before cutover, ensuring your reporting obligations are met without disruption.
Regulatory checkpoint automation
Solvency II. FCA reporting. Reserve calculation validation. Keystone automates the regulatory checkpoints that typically require weeks of manual verification.
Parallel migration execution
Run migrations alongside your live system. No downtime. No BAU disruption. Production data stays live while Keystone processes the migration in parallel.
Evidence-first verification
Every migration produces an evidence pack: data lineage, reconciliation reports, anomaly resolution logs, regulatory documentation. Prove it worked before you commit to cutover.
Your data stays in your environment.
KeystoneMigrate processes in-situ. Your data never leaves your environment.
Your Environment
- • Data platform (Databricks, Snowflake, Fabric)
- • Policy data
- • Claims data
- • Underwriting data
KeystoneMigrate
- • Orchestration
- • Validation
- • Reconciliation
KeystoneMigrate connects to your data platform via secure, audited channels. The migration logic executes within your environment. What crosses the boundary is orchestration instructions (in) and evidence metadata (out). Your policy data, claims data, and underwriting data remain within your security perimeter at all times.
What makes Keystone different.
We understand insurance data, not just tables.
Generic ETL tools see rows, columns, and relationships. Keystone sees policies, endorsements, reinsurance structures, and delegated authorities. The difference matters when endorsement 47 modifies terms that depend on endorsement 12, which was itself a retroactive adjustment to the original placement.
Prove it worked before you commit.
Most migration approaches verify after cutover. By then, it's too late – you're running on the new system and fixing issues in production. Keystone proves the migration is correct before you cut over. Full-book reconciliation. Not a sample.
Coordinate across your entire operation.
A migration doesn't just affect IT. It affects underwriting, actuarial, claims, compliance, brokers, and regulators. Keystone orchestrates across lines of business, across stakeholder groups, and across regulatory jurisdictions. Insurance Migration Control for the entire programme.
How migration directors evaluate their options.
Big SI firms
Accenture, Deloitte, Cognizant, TCSThe appeal:
Trusted brands. Deep benches. They have done large transformations before.
The reality:
They staff generalists who learn your domain on your budget. A 50-person team with 2 insurance SMEs means 48 people reading your documentation. Timelines stretch. Budgets double. And when the project gets hard, the A-team rotates to the next sale.
Keystone's answer:
KeystoneMigrate replaces the army with a product. Insurance domain logic is built in, not learned on the job. The team that built it has delivered the migrations these firms quote for.
How migration directors evaluate their options.
PAS vendor migration tools
Guidewire Migration Accelerator, Duck Creek conversion utilitiesThe appeal:
Purpose-built for the target platform. Often bundled with the PAS licence deal.
The reality:
They only migrate TO their own platform. They have no incentive to handle the messy reality of your SOURCE system — the undocumented batch jobs, the hand-coded endorsement logic, the edge cases that live in spreadsheets. And they measure success by data loaded, not by business outcomes validated.
Keystone's answer:
KeystoneMigrate is source-system agnostic and target-system agnostic. We focus on the hardest part — understanding and migrating what you actually have, not just loading data into a new schema.
How migration directors evaluate their options.
Do nothing (status quo)
Extend mainframe support, defer the programme, run dual systemsThe appeal:
No risk of migration failure. No disruption to BAU. Politically safe in the short term.
The reality:
Mainframe support costs rise 15-20% annually. Every year you defer, the skills to understand your legacy system erode further. Your competitors are already on modern platforms. And the regulator is asking questions about operational resilience that your mainframe cannot answer.
Keystone's answer:
KeystoneMigrate makes migration viable by driving down the unit economics. The migration that was too risky at £40M becomes a business case you can commit to at a fraction of that — with evidence at every stage.
Ready to see KeystoneMigrate in action?
Book a discovery call with our team. We'll discuss your specific migration scenario, walk through the methodology, and show you what KeystoneMigrate would look like for your book.