The hard part of this move is not the export. It is the difference in how the two systems think. CosmoLex works in matter records; MyCase works in case records. Get that mapping wrong and every report built on it afterwards is wrong too. This page covers the field map, what does not survive, what it costs, and the reconciliation step that decides whether anyone trusts MyCase in month two.
The two systems, side by side
| CosmoLex | MyCase | |
|---|---|---|
| Primary record | Matter | Case |
| Grouping | Client and contact links | Client and contact links on the case |
| Activity history | Notes, tasks and calendar | Notes, tasks, calendar and client-portal messages |
| Documents | Documents on the matter | Documents on the case, shared through the portal |
| Getting data out | CSV export; accounting data extracts separately. | CSV export per module and a vendor-assisted extract. |
| Who administers it | None. | None. Anyone on staff can run it. |
| Pricing | Custom quoted. | $50 to $130 per user per month billed annually. |
What breaks
- CosmoLex works in matter records and MyCase works in case records. That is a re-modelling exercise, and it is the first decision, not a mapping detail.
- Grouping changes: Client and contact links becomes Client and contact links on the case. Somebody has to define what a group means in the target before load.
- Activity history moves with partial fidelity. CosmoLex stores it as notes, tasks and calendar; MyCase expects notes, tasks, calendar and client-portal messages.
- Automations, reports, dashboards and permissions never transfer. Budget them as build work.
- Every connected system has to be repointed and retested: the DMS, billing, e-signature and the shared inbox.
Known hazards on each side
Leaving CosmoLex:
- The general ledger and trust accounting are the reason firms chose it, and most targets do not replace them.
- Accounting and matter data have to reconcile after the move or the books do not tie.
- Historic trust transactions carry retention obligations of their own.
Arriving in MyCase:
- Client-portal messages are client communications, and dropping them can create a records gap.
- Billing, trust and time data reconcile separately from the case data.
- Custom fields are lightweight, so richer target systems will need decisions rather than mappings.
The field map
| Concept | In CosmoLex | In MyCase | What to watch |
|---|---|---|---|
| Primary record | Matter | Case | Different shape. Decide the mapping before any data moves. |
| Grouping | Client and contact links | Client and contact links on the case | The target groups records differently, so grouping is created rather than copied. |
| Activity history | Notes, tasks and calendar | Notes, tasks, calendar and client-portal messages | Expect partial fidelity. Types, timestamps and authorship survive; structure often does not. |
| Documents | Documents on the matter | Documents on the case, shared through the portal | Usually a separate extract and load from the record data. |
| Owner and assignment | Assigned user or advisor fields | Assigned user or team fields | Map departed staff explicitly. Records assigned to nobody disappear from every view. |
| Custom fields | Firm-specific fields added over time | Created to match, or consciously dropped | The audit here is the work. Undocumented fields that reports depend on are the usual surprise. |
Cost and timeline
| Phase | Typical range |
|---|---|
| Data audit and cleanup | $3,000 to $25,000 |
| Migration execution | $5,000 to $50,000 |
| Target configuration | Two to six weeks |
| Ongoing administration | Absorbed by existing operations staff |
The five phases
- Audit CosmoLex. Count records per object, find duplicates and orphans, and decide what does not come with you. Get that decision signed off before mapping.
- Map against real records. Use the table above as the starting point, then walk fifty live records field by field.
- Dry run into a MyCase sandbox. Load the full set, not a sample. Sample loads hide the failures that only appear at volume.
- Cut over on a quiet window. Freeze writes in CosmoLex, load, repoint every integration, unfreeze. Keep CosmoLex read-only for at least a quarter.
- Reconcile. Compare MyCase to CosmoLex record by record and field by field, and produce a variance report.
The full version of this plan, with the failure evidence behind it, is in the CRM migration playbook.
The compliance clause
State retention rules and the firm's duties over the client file survive the migration. A matter that lands in the target without its history is a records gap, not a cosmetic issue. Keep the field map, the variance report and the mapping sign-offs with the records, because the decisions you made in phase two are part of the record too.
Where Caddi fits
Caddi does the mechanical half and then keeps doing it. Show it the task once and it reads CosmoLex, applies your field map, loads MyCase, and then compares both sides record by record and hands back a variance report you can act on. Because it runs over APIs across your stack, the same agent covers the parts a migration tool ignores: documents filed to the right case with the right metadata, and the post-cutover hygiene that otherwise becomes someone's Monday.
Caddi automation for these systems: MyCase.
Related migrations
- Clio Grow to MyCase
- Clio Manage to MyCase
- Filevine to MyCase
- Litify to MyCase
- MyCase to Clio Grow
- MyCase to Clio Manage
Migration without the manual pass
Move and reconcile CosmoLex into MyCase
Caddi reads CosmoLex, applies your field map, loads MyCase, then compares both sides record by record and reports the variances.
Frequently asked questions
How do you migrate from CosmoLex to MyCase?
Audit the CosmoLex data first, then map fields against fifty real records rather than against the schema, dry run the full set into a MyCase sandbox, cut over on a quiet window with writes frozen, and reconcile record by record afterwards. CSV export; accounting data extracts separately. MyCase then needs the records loaded in dependency order, with documents as a separate pass.
What does not transfer from CosmoLex to MyCase?
CosmoLex works in matter records and MyCase works in case records. That is a re-modelling exercise, and it is the first decision, not a mapping detail. Grouping changes: Client and contact links becomes Client and contact links on the case. Somebody has to define what a group means in the target before load. Activity history moves with partial fidelity. CosmoLex stores it as notes, tasks and calendar; MyCase expects notes, tasks, calendar and client-portal messages.
How long does a CosmoLex to MyCase migration take?
Six to twelve weeks is realistic for a clean mid-size move, and three to six months where MyCase is being implemented at the same time. Firms with years of history in CosmoLex should budget several weeks of cleanup before any data moves.
Who administers MyCase afterwards?
None. Anyone on staff can run it. That is one of the reasons this move is lighter than a platform migration.
What are the compliance implications for law firms?
State retention rules and duties over the client file survive the migration. A gap in matter history is a finding, not a cosmetic issue, so keep the field map, the variance report and the sign-offs with the records.