Aderant Expert Sierra vs ATOM

Aderant Expert Sierra is a practice and financial management system for law firms, covering matter work, billing, trust management, and time and expense capture. Practice tools include conflict checks, file opening, client and matter management, work in progress, collections, reporting, and analytics. Billing features include paperless pre-billing, Alternative Fee Arrangement management, invoice flexibility, and billing compliance management. Lawyers can enter and track time on any device; expense claims can use configurable routing and approval workflows. Sierra can integrate with CRM, document management, and HR systems, and Aderant says existing customizations and integrations can be retained during migration. A First AML connection supports checks within the practice workflow and records verification outcomes for reporting and audit. Built on the Stridyn cloud platform, the product offers MADDI AI capabilities, including natural-language queries and AI-powered automation. Aderant describes proactive monitoring, extensive auditing, SOC 2 Type 2 compliance, and AWS hosting. The service is presented as remote and mobile-friendly, with global support coverage and optional elevated technical support. It runs on Android, iOS, and web. Pricing is not published; firms are asked to request a demo.

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