Onyx By Aderant

What It Does

Onyx is an Outside Counsel Guideline (OCG) compliance product from Aderant, the Atlanta-based legal billing and practice management vendor. It checks timekeeping and billing entries against client-imposed billing guidelines at the point of entry, aiming to flag potential violations before invoices are sent. Aderant positions it as a way to reduce write-downs and invoice rejections. It is part of Aderant’s wider billing suite rather than a standalone company.

What We Found

Aderant introduced Onyx as an AI-assisted compliance layer tied to MADDI, Aderant’s in-house AI tooling, and markets it alongside its iTimekeep and BillBlast billing products. The firmographics below describe the parent company, Aderant.

What We Haven’t Verified

• Pricing for Onyx specifically — Aderant does not publish list pricing; a demo is required.
• Independent user reviews of Onyx as a distinct module (most review coverage is of Aderant’s broader billing suite).
• The accuracy or scope of the AI compliance checks in practice.

Company Info

• Parent company: Aderant (part of Roper Technologies)
• Founded: 1978 (Aderant)
• HQ: Atlanta, GA, USA
• Headcount: ~861 (third-party directory, March 2026)
• LinkedIn: linkedin.com/company/aderant