Most legal departments already use an eBilling system such as Thomson Reuters Legal Tracker, LexisNexis CounselLink, Brightflag, TeamConnect, Wolters Kluwer TyMetrix, Onit, or SimpleLegal. These platforms are essential — but they were built mainly to receive, route, and pay invoices.
What eBilling rules engines do well
- Validate invoice format (LEDES) and required fields.
- Apply fixed checks such as rate caps and task codes.
- Route invoices to the right approvers.
Where they usually stop
Built-in rules are typically structured checks on fields. They rarely read the narrative text of a time entry or compare entries against each other. That is where block billing, vague descriptions, and internal conferences hide.
Where AI first level review fits
An AI first level reviewer reads each line the way a careful human would, applies your specific guidelines, and explains every flag. It does not replace your eBilling system — it works alongside it.
Two ways to use 42B
- Self-serve: sign up, upload your OCGs, and upload invoices manually. Most teams see their first reviewed invoice within 10 minutes.
- 42B Integrated: 42B works inside your existing eBilling system as a first level reviewer, so flags arrive where your team already works.
Questions to ask any vendor
- Does it apply my guidelines, or a generic rule set?
- Does every flag cite the guideline section?
- Can my team adjust or override every decision?
- Is customer data used to train AI models? (At 42B, never.)