Compare 26 legal hold and preservation platforms used by corporate legal, eDiscovery, and litigation teams to issue, track, and audit holds. Exterro, Onna, Zapproved (Exterro), Mitratech, and Logikcull lead the category. Verified reviews from eDiscovery, litigation support, and information governance teams.
Legal hold software automates the issuance, acknowledgement, tracking, and release of litigation hold notices, and increasingly integrates with in-place preservation in Microsoft 365, Google Workspace, Slack, and other collaboration systems. The market consolidated significantly after Exterro acquired Zapproved in 2023, and Reveal acquired Onna and Logikcull. The leading independents now are Hanzo and Casepoint.
Buyers typically come from two paths. eDiscovery-led teams already running eDiscovery platforms add the same vendor's hold module — Exterro, Casepoint, OpenText. Legal-operations-led teams favour Zapproved and Onna for simpler hold-only workflows with strong custodian acknowledgement and reporting.
Selection criteria: FRCP 37(e) defensibility, in-place preservation in Microsoft 365 Purview, Slack and Teams collection, custodian survey workflow, audit trail, and integration to matter management, IAM, and HR systems. See the Zapproved vs Exterro comparison and the legal hold buyer guide.
Index.Html is one of several options in the Legal Hold Software category on TechVendorIndex. The right way to evaluate it is in the context of your specific buyer profile rather than in isolation: who in your organisation will use it day-to-day, what scale of deployment you need, what existing systems it has to integrate with, and which capabilities are non-negotiable for your use case. Index.Html's strengths land best for buyers who match a particular profile; the related pages and comparisons surface the trade-offs against the most common alternatives so a buyer can decide quickly whether to keep it on the shortlist or rule it out.
Buyers who shortlist Index.Html typically focus their proof-of-concept on three things: depth of functionality in the specific use case that triggered the project, real-world performance and stability under representative load, and the practical experience of integrating with the rest of the existing stack. Vendor-provided demonstration environments rarely surface integration friction, identity-management edge cases, or data-volume scaling limits. A structured pilot against a representative slice of your own data is the single highest-leverage step in the evaluation.
The list price for Index.Html is only one element of the three-year total cost of ownership. Buyers also need to estimate implementation services, internal team time, integration platform fees, training and change-management costs, and any adjacent tooling required to make the product useful in the buyer's specific environment. Vendors often offer attractive year-one pricing that does not reflect the true ongoing cost; ask explicitly for a three-year quote with assumptions documented before signing.
Each profile on TechVendorIndex is reviewed at the same cadence as the parent category. Index.Html's position in the Legal Hold Software category may shift as competing products release new capabilities, as Index.Html itself releases new versions, or as pricing models change. Buyers who selected Index.Html more than two years ago may want to re-evaluate even if the product is meeting needs today.