MIRA vs. Billables AI: Which Legal Timekeeping Platform Delivers More Value?

Aug 18

4 min read

AI-powered timekeeping has become one of the fastest-growing categories in legal technology. Law firms are increasingly adopting solutions that automatically capture work activity, generate billing narratives, and reduce revenue leakage caused by forgotten or delayed time entries.

Two vendors receiving attention in this space are MIRA and Billables AI. Both platforms leverage AI to automate timekeeping, but they differ significantly in philosophy, security, deployment flexibility, enterprise readiness, and overall cost.

The question for law firms is no longer whether to adopt AI timekeeping. The question is which platform delivers the best long-term value.

What Both Platforms Do Well

Both MIRA and Billables AI focus on solving the same fundamental problem:

Recover missed billable time
Reduce administrative burden on attorneys
Automatically generate billing narratives
Improve billing consistency
Speed up invoice preparation

Billables AI emphasizes passive activity tracking across Microsoft 365, email, meetings, documents, browsers, and legal applications while automatically generating time entries and narratives.

MIRA similarly captures attorney activity across documents, email, communications, meetings, and legal workflows while generating AI-assisted narratives and matter-based time entries.

The similarities end there.

1. Security First: SSO Should Not Be a Premium Feature

Many legal technology vendors still treat security features as premium upsells.

MIRA takes a different approach.

MIRA is designed around Microsoft and Google identity providers, enabling firms to leverage their existing identity management, Multi-Factor Authentication (MFA), conditional access policies, user provisioning, and offboarding workflows. Rather than maintaining another username and password database, firms can centralize authentication through their existing enterprise identity platform. This approach aligns with modern security best practices and reduces credential management risks.

By contrast, third-party pricing comparisons indicate that Billables AI includes SSO only in its Premium tier, which is listed at approximately $169 per user per month, while lower plans do not include SSO functionality.

For law firms, this raises an important question:

Should security be an optional upgrade, or should it be part of the foundation of the platform?

At MIRA, we believe SSO is not an enterprise luxury. It is a basic security requirement.

2. Pricing Transparency and Total Cost

Public pricing information for Billables AI indicates:

Billables AI Plan	Price/User/Month	Notable Limitation
Single	~$47	Limited workflow integrations
Standard	~$109	No SSO
Premium	~$169	SSO and delegated access included

As firms grow, identity management, delegated administration, and compliance controls become operational requirements rather than optional features. Under the published pricing structure, firms may need to move to the highest tier simply to obtain enterprise-grade authentication and administration capabilities.

MIRA's philosophy is different:

Security should not require a premium upgrade.
SSO should be the default.
Law firms should not pay an additional tax simply to align with their security policies.

For a 100-lawyer firm, even seemingly small per-user security surcharges can represent tens of thousands of dollars annually.

3. Built for the Microsoft Ecosystem

Most law firms already operate inside Microsoft Teams and Outlook.

Rather than asking attorneys to learn another application, MIRA was built to live directly within those tools. Attorneys can review, edit, merge, and release their time entries inside Microsoft Teams, eliminating unnecessary context switching.

Billables AI integrates with Microsoft 365 and Teams, but its user experience is centered around a broader cross-platform workflow strategy.

For firms standardized on Microsoft 365, MIRA offers a more native experience that can significantly reduce change-management challenges and improve adoption.

4. AI Timekeeping Plus OCG Compliance

Capturing time is only the beginning.

The real financial challenge is ensuring that time survives client billing review.

MIRA includes automated compliance capabilities designed to support Outside Counsel Guidelines (OCGs), identify billing issues early, and help prevent invoice rejections before they occur. Internal product documentation specifically references OCG validation and automated billing rule enforcement.

Billables AI also promotes compliance-focused narrative generation and billing-guideline awareness.

The difference is that MIRA's vision extends beyond drafting narratives and toward helping firms improve realization rates and billing outcomes across the full lifecycle.

5. Enterprise Law Firm Readiness

Smaller firms often need a timekeeping solution.

Larger firms need an ecosystem.

MIRA integrates with enterprise legal finance platforms including:

Aderant
Elite
MATTEROOM
Custom financial systems

MIRA also supports:

Administrative portals
Delegated review workflows
Desktop activity capture
Mobile access
Advanced dashboards
Private AI model options

These capabilities make MIRA particularly attractive to midsize and large firms seeking a strategic platform rather than a standalone time capture tool.

The Bottom Line

Billables AI is a strong AI timekeeping solution that helps firms recover missed time and automate billing narratives. It has earned attention in the market for making passive time capture accessible to legal professionals.

However, MIRA was built with a broader mission:

Recover more billable time while protecting firm security, simplifying adoption, enforcing billing compliance, and integrating directly into the systems lawyers already use.

When evaluating vendors, firms should ask: