The best billing compliance software for a law firm checks outside counsel guidelines before submission, files LEDES invoices to the portals clients require, and keeps appeals and collections in the same workflow. BillSync is Scan Logic’s software for that job: one guideline library, pre-bill review, and submission across more than 40 billing portals. A separate 2026 comparison covers BillSync beside Aderant BillBlast, eBillingHub, and PointOne.