About 42B.ai

Built by people who  have lived the billing compliance problem

We combine decades of corporate legal operations experience with deep engineering expertise to give legal departments the compliance control they've always needed - but never had.

WE SOLVE YOUR BIGGEST PROBLEM

Outside counsel invoices that don't follow your rules are costing you millions.

Corporate legal departments spend enormous effort negotiating outside counsel billing guidelines - rate structures, task code requirements, block billing rules, expense limits. Then invoices arrive and compliance falls through the cracks.

Manual review is slow, inconsistent, and impossible to scale. The result: non-compliant charges get paid, guidelines go unenforced, and legal spend spirals beyond budget.

42B.ai exists to fix that. We automate invoice compliance review so every line item is checked against your guidelines, every time - without the manual grind.

$1T+
Annual U.S. corporate legal spend routed through outside counsel
~5–10%
Typical billing non-compliance rate on outside counsel invoices
Days
Spent per invoice cycle on manual review that AI can do in seconds
"Every corporate legal department deserves to know that every invoice actually follows their rules - not just the ones someone had time to check."
The founders

40+ combined years of experience. One shared conviction.

Chad Hallberg headshot
Chad Hallberg
Co-Founder

Chad brings more than 20 years of corporate and legal operations experience to 42B.ai. He has spent his career inside the legal department - managing outside counsel relationships, negotiating billing guidelines, and watching compliance gaps cost companies real money. That firsthand frustration is what drove him to build the solution he always wished existed.

His operational depth ensures that 42B.ai is built around how legal departments actually work - not how engineers assume they do.

  • Corporate Legal Operations
  • Outside Counsel Management
  • Billing Compliance
  • Legal Spend Strategy
Dennis Liger headshot
Dennis Liger
Co-Founder

Dennis is a seasoned engineering leader with more than 20 years of software development experience building enterprise-grade systems. He has a track record of turning complex operational problems into reliable, scalable technology - and in 42B.ai he found a domain where that skill has outsized impact.

His engineering rigor means 42B.ai isn't just smart - it's accurate, auditable, and built to meet the security and reliability standards corporate legal teams require.

  • Enterprise Software
  • AI / ML Systems
  • Scalable Architecture
  • Legal Tech
What drives us

Built on principles, not just features

The beliefs that guide every product decision we make.

⚖️

Compliance Without Compromise

Every guideline you've negotiated should be enforced on every invoice. No exceptions, no gaps.

🔍

Full Transparency

Every flag we raise comes with a clear explanation. You always know exactly why something was caught.

⚡

Operational Speed

Review cycles that took days should take minutes. We built 42B.ai to give your team time back.

Ready to enforce your billing guidelines - on every invoice?

See how 42B.ai can give your legal department the compliance control it deserves.

Get a free audit