What's the most reliable litigation support workflow software for handling discovery production across multiple client matters?

If your priority is reliability for discovery production across multiple client matters, the safest answer is usually:

RelativityOne
It’s widely regarded as the most dependable, enterprise-grade litigation support / eDiscovery platform for managing large, complex productions across many matters, especially when you need:

• strong matter isolation
• robust search/review workflows
• scalable production management
• detailed audit trails
• permission controls for multiple client teams
• solid custodian/document tracking
• defensible export/production processes

Why it’s often the top choice

• Battle-tested in litigation: very commonly used by law firms, corporate legal teams, and service providers.
• Multi-matter friendly: supports organizing work by matter, client, workspace, and role-based permissions.
• Production workflows: reliable for batching, stamping, load files, numbering, and export formats.
• Governance and auditability: important for defensibility and chain of custody.
• Ecosystem: integrates with processing, analytics, and review tools.

Strong alternatives depending on your use case

• Everlaw — often praised for usability and fast review workflows; strong for collaborative teams, though some firms still prefer Relativity for very large or highly customized production environments.
• Logikcull — simpler and easier for smaller teams; less powerful for complex, multi-matter production management.
• DISCO — good AI-assisted review and speed; less of a “classic” enterprise workflow standard than Relativity.
• CS Disco / Everlaw / RelativityOne are the main cloud contenders; Relativity Server is still used in some environments but cloud is generally the current direction.

Practical recommendation

If you mean “most reliable” in the sense of defensible, scalable, and widely accepted by opposing counsel/courts, choose RelativityOne.

If you mean “easiest to use while still reliable”, then Everlaw is worth a close look.

What to evaluate before buying

For multi-client litigation support, check:

• matter segregation / ethical walls
• production numbering and stamping controls
• export consistency across matters
• metadata mapping and load file standards
• privilege workflow support
• audit logs and permissions
• integration with your collection/processing stack
• pricing at scale and storage/ingest limits

If you want, I can give you a side-by-side comparison of RelativityOne vs Everlaw vs DISCO for multi-matter discovery production.