eDiscovery Costs, ROI, & Top Strategies

Picture this: you open the invoice from your eDiscovery (electronic discovery) vendor, only to find that the original budget has been blown out of the water. But when you check with the vendor, the new cost is accurate. And now you have to deal with adjusting your budget to fit this new scope.

This is a scenario that happens to many firms. While it’s obvious that eDiscovery tools cost money, the reasons why aren't always obvious until you've already been burned. But the cost of eDiscovery doesn’t have to be a black box. Once you know what actually drives the number and where vendors tend to pad it, you can build a tighter budget and get more out of every dollar you spend. 

This guide walks through what affects eDiscovery costs, the pricing models you'll run into, and a few strategies for getting the best return on your spend — including where AI fits into the discovery process. 

‍Note: If you need a refresher on the process itself first, we've covered what eDiscovery actually involves elsewhere — here we're focused squarely on cost.

What Affects eDiscovery Costs?

eDiscovery pricing is never just one number. It's built from several moving pieces, and if you don't know what they are, a high invoice can catch you off guard. Here are five things that typically affect eDiscovery costs:

1. Data Volume

The biggest lever is the simplest one: how much data are you collecting, processing, and reviewing? A single legal matter can easily involve well over 100 GB of electronically stored information (ESI). Think email, texts, cloud files, and all types of recordings. 

More data means more time at every downstream step, so trimming volume early is one of the fastest ways to control cost. Try to narrow date ranges, custodians, and file types before anything gets ingested.

So how much does eDiscovery cost per GB? Historically, a lot. The RAND Institute for Civil Justice found it cost roughly $18,000 per GB across the full collection-to-review lifecycle back in 2012. Rates have come down considerably since, but per-GB processing alone often runs from $25 to $75 today, with hosting and review billed separately on top. A number that adds up quickly once a matter passes 100 GB.

2. Data Type And Complexity

Not all data costs the same to process. A folder of PDFs is cheap. A mix of encrypted files, foreign-language documents, and hours of recorded interviews or deposition audio is not. 

Audio and video evidence gets expensive fast when it's billed by the hour for transcription alone. And that’s before your team can even start reviewing it. 

If a matter involves recorded evidence, budget for it separately from document review — it's the piece that most often gets missed until the invoice shows up. Or, consider working with a vendor that does both for one low monthly fee! Rev offers legal-grade transcription, evidence analysis, document creation, and more all within one platform.

3. Processing And Hosting

Once data is collected, it has to be processed — deduplicated, indexed, converted into a reviewable format — then hosted on a platform while your team works through it. These are usually two separate line items, both billed per GB, and they compound on larger matters. Ask any vendor for an all-in estimate rather than a per-GB quote in isolation; the quoted rate rarely tells the whole story.

4. Document Review

Attorney hours spent reading, coding, and making privilege calls on documents eat up a lot of law firms’ total eDiscovery budgets. Manual, page-by-page review at partner or contract-attorney rates gets expensive fast — which is exactly why AI-assisted review platforms like Rev have become crucial to controlling costs on any matter of real size.

As for how much legal discovery costs overall: it depends on data volume and how much of the review gets automated versus done by hand. A small matter might run a few thousand dollars start to finish. A large one with heavy manual review can climb into six or seven figures. That gap usually comes down to how well the case was scoped and how much of the review was done with generative AI assistance.

5. Hidden Fees

Watch for charges beyond the standard rate: per-file upload fees, per-page production costs, minimum monthly commitments, and “technology fees” for things that should be included by default. These hidden costs can turn a $5,000 monthly estimate into a $15,000 actual bill. Ask every vendor for a full fee schedule before you sign — not just the number on the homepage.

How To Determine Your eDiscovery Needs

Before you shop for a tool or a vendor, get clear on what the matter actually requires. Work through these questions with your team first:

• How much data are we realistically dealing with, and from how many custodians?
• What types of files are involved — email and documents only, or also audio, video, and mobile data?
• Do we need in-house review capacity, an outside vendor, or some mix of both?
• What's our timeline, and does the court's schedule leave room for slower, cheaper processing?
• What's our realistic budget ceiling for this matter, and what would it cost us to under-invest in discovery here?

Answering these upfront makes it much easier to compare vendors apples-to-apples, and it keeps your eDiscovery project management process from turning into a series of one-off decisions made under deadline pressure. Here’s what Cierra Wilson, Attorney at Cierra Esq had to say about creating a workflow for your firm:

“Our eDiscovery workflow is systematized from day one: we identify custodians early, map relevant data sources, and use metadata and tagging to stay organized,” explains Wilson.

“Transcription plays a big role here, we use Rev to transcribe anything that isn’t already searchable, then use AI to extract key facts, flag contradictions, and build clean outlines for motion practice or trial…Every document, every transcript, it's all evidence if you know how to use it.”

Common Pricing Models For eDiscovery Tools

Most eDiscovery software pricing falls into a handful of buckets, and each one rewards a different kind of case.

Per-GB pricing charges you based on how much data you store and process, often billed separately across ingestion, hosting, and review. It's easy to understand, but it penalizes firms with large mailboxes even when most of that data turns out to be irrelevant. A 100 GB matter billed at $25–$75 per GB for processing alone can turn into a five- or six-figure bill before anyone opens a document.

Per-seat pricing charges a flat rate per reviewer per month. It works well for smaller, steady caseloads, but gets expensive fast if you staff up with contract attorneys during a document-heavy crunch.

Hybrid and custom pricing options often mix a per-seat charge with a per-GB data fee, and the cost savings alone make it a good option for firms with a steady stream of mid-size matters.

‍

“Complex data sets appear more often now, so I have used eDiscovery platforms when a project holds at least 10GB of mixed email, chat, and cloud drives. The platforms handle de-duplication and threading faster than manual review, and they give an audit trail that survives cross-examination,” explains David Gammill, Attorney and founder of Gammill Law Accident & Injury Lawyers. 

“The choice turns on cost per gigabyte, anticipated privilege calls, and whether opposing counsel will accept the format.”

Before committing to any platform, it's worth reading eDiscovery software reviews from firms with a caseload similar to yours — pricing on paper rarely tells you how a tool actually performs on a real matter. And if you're weighing a few AI-enabled options against each other, this Relativity vs Everlaw software comparison can save you a lot of guesswork.

The ROI Of Legal AI

The most important thing to remember here is that the lowest sticker price isn't always the best deal. A platform that costs more per seat but cuts review time by 80% is usually far cheaper in total than a bargain tool that leaves associates buried in documents for weeks. To find real ROI, weigh the platform cost against the hours you'd otherwise spend on manual review, at your team's actual billing rate.

If you want to run the numbers on your own caseload, Rev's AI ROI calculator for law enforcement and legal technology ROI calculator for criminal defense are a good starting point for what an AI-assisted review is actually worth in hours and dollars.

5 Strategies To Boost eDiscovery ROI

A few practical moves can meaningfully change what you get back for every dollar you spend on eDiscovery. Here are five strategies to help boost your ROI on eDiscovery tools:

1. Cull Before You Process

Every gigabyte you filter out with date ranges, custodian scoping, and keyword searches before ingestion is a gigabyte you never pay to process, host, or review. It's the biggest way to make an impact on your bottom line, though keep in mind this step can get rather time-consuming. 

2. Let AI Handle First-Pass Review

Technology-assisted review and AI classification can sort through thousands of documents and surface what actually needs human review, instead of paying attorney rates to read every file line by line. This doesn't replace legal judgment on close calls — it just frees your team to spend time on the documents that actually need it.

3. Prioritize Recorded Evidence

Witness interviews, depositions, and body cam footage often get treated as a separate, manual cost sitting outside the main eDiscovery budget — and that's where spend can skyrocket. 

Turning those recordings into searchable, timestamped transcripts up front means your team can search across hours of audio and video the same way they'd search a text document. Rev's multi-file analysis lets teams search across dozens of recordings and case files at once — a very different cost profile than billing for manual audio review hour by hour.

4. Match The Pricing Model To The Matter

A per-GB model might be the wrong fit for a data-heavy case, and a flat-fee tool might be the wrong fit for a matter likely to grow. Revisit the pricing model at the start of every matter instead of defaulting to whatever the firm used last time.

5. Track Cost And Time Metrics

Firms that track their actual cost-per-GB and hours-per-review build a track record that makes every future vendor negotiation stronger. Without that data, you're negotiating blind. This is especially helpful for corporate legal departments with years of data that can be used to save your company some cash.

Get More From Every eDiscovery Dollar

The importance of eDiscovery doesn’t always have to match the overall cost. Understanding what drives the number, choosing the right pricing model for your caseload, and using AI to cut hours spent on manual review help to create an eDiscovery process you can actually plan around. 

For firms working through recorded evidence alongside documents, Rev's platform turns audio, video, and images into searchable, citable materials your team can move through quickly — without losing the thoroughness every case deserves.