SAP S/4HANA · clean core, end to end
Know your custom code. Prove what breaks. Migrate clean.
Fathom turns your SAP custom estate into a governed, evidence-backed migration. Every custom object assessed, every breakage flagged against your target release, every fix tracked to validated: the system of record your S/4HANA move runs on.
Decades of custom code stand between you and clean core.
Every brownfield S/4HANA move starts in the same place: thousands of custom objects, tangled dependencies, and no honest map of what’s a decommissionable copy versus genuine, load-bearing custom. The deadline doesn’t move. Assessed by hand, it’s months of senior-architect time. Assessed by an AI workbench, it’s a black box you can’t defend on your core ERP.
Custom debt you can't see
Years of Z-code, copies, and forgotten reports, with no system of record for what's actually there.
Risk you can't quantify
Which objects break on your target release? Which are safe as-is? Today that's tribal knowledge.
Verdicts you can't defend
“The AI said retire it” doesn't survive a steering-committee challenge on a production system.
A migration you can't track
Disposition is step one. Remediated, deployed, validated: that lifecycle lives in spreadsheets.
From custom-code chaos to a clean core you can prove.
Connect
Point Fathom at your SAP system over standard OData. Nothing to install on your landscape; it runs inside your security boundary.
Extract
Fathom discovers the full custom estate: every service, ABAP object, Fiori app, and dependency. The structure that took years to build, mapped in minutes.
Assess
Each object is matched against SAP standards and scored on an evidence graph: a disposition (keep, fix, or retire) with the provenance, structural, and ABAP evidence behind it, and a confidence.
Decide
A clean-core score and a ranked work-list: what's decommissionable, what's genuine custom, what breaks on your target release, and the minimum mitigation for each.
Govern
Every object carries through the lifecycle: disposition, remediation, deployed, validated against your target. Fathom drives the executors you already use and tracks the whole estate to done.
One engine, the whole migration.
From first scan to validated rebuild, every stage runs on the same evidence graph.
Estate assessment
Per-object clean-core dispositions across services, ABAP, and Fiori, each with typed evidence links and confidence. Auditable by construction.
Breakage verdict
Target-aware: not just “this is custom,” but “does this break on your S/4 release and clean-core posture, is it used, and what's the smallest mitigation?”
Migration deliverable
The KMD library and the handoff packets your program runs on: executive readout, the remediation queue that drives SAP's Custom Code Migration Agent, interface-risk, data-gap, regression heatmap, ALM/Jira export.
Governance & validation
A live system of record: every object's status from queued to validated, estate-wide progress, re-scan on change, and source-to-target equivalence that proves a rebuilt object still behaves.
Built to be trusted on a system of record.
Evidence, not a black box
No LLM in the verdict path. Every disposition traces to data you can inspect, so it survives the steering committee, the auditor, and the skeptical architect. Point to the data, not a model's opinion.
Your boundary, your brand
Runs on-prem, in your cloud, or hosted single-tenant. Your source data never leaves your control. White-label per deployment.
Augments your team, never replaces it
Fathom is partner-neutral: it tells the migration what to keep, fix, and retire, then routes the work to your executor (SAP's CCM Agent, SmartShift, your factory, your CI). An engine your team operates, not a delivery shop that competes with it.
Weeks, not months. Evidence, not guesswork. A clean core you can prove.
Faster to a plan
The estate assessed in minutes, not architect-weeks.
Lower risk
Every breakage flagged against your target before you commit.
Defensible
Every verdict backed by evidence you can show.
Governed to done
The whole migration tracked from disposition to validated.
See your migration the way Fathom does.
Explore a full estate, assessed end to end, in the live demo, or get in touch to run Fathom on your own.