Expert Guide

The Best Data Loss Prevention Software in 2026

One of these is $12 a month on E3. Another is already inside a $60 E5 seat. Three will not print a number until a sales call.

Louis CorneloupFounder, Dupple · 920,000+ readers · Updated Sep 2026

Product links may be affiliate links. How we rate 5 tools compared

TL;DR

Microsoft Purview DLP is the only product on this list with a public sticker. Microsoft 365 E5 is $60 per user per month paid yearly and includes Purview. On E3 ($39 per user per month) the Purview Suite add-on is $12 per user per month. E3 already covers DLP for Exchange, SharePoint and OneDrive; the add-on is the rest of the suite.

Nightfall prices per user per year but prints no dollar amount on its pricing page. Vendr's median from 41 purchases is $25,000 a year (range $12,000-$73,200). Forcepoint, Symantec DLP and Cyberhaven are quote-only. Third-party 2026 ranges sit around $30-$80 per user per year for the legacy suites; Vendr's Cyberhaven median is $37,872 a year.

Key facts5 tools compared: Microsoft Purview DLP, Nightfall, Forcepoint DLP, Symantec DLP, Cyberhaven

Updated: September 25, 2026
Top pick: Microsoft Purview DLP (best for: Microsoft 365 teams on E5, or E3 teams adding the $12 Purview Suite)
Top pick price as of September 25, 2026: Microsoft Purview DLP: From $12.00/user/mo (Purview Suite add-on on E3, paid yearly)

5 tools compared: Microsoft Purview DLP, Nightfall, Forcepoint DLP, Symantec DLP, Cyberhaven
Nightfall (best for: Teams that need Slack, Google Drive, GitHub and AI paste covered, without an on-prem file share): Quote-only, per user per year; 7-day proof of value
Forcepoint DLP (best for: Companies with file shares and a network that want one policy for email, web, endpoint and cloud): Quote-only (cloud SaaS or on-prem)
Symantec DLP (best for: Large companies on Symantec that need exact record and document matching, plus a DLP team): Quote-only (Core on-prem or Cloud suite)

Data loss prevention is sold as one category and invoiced as three different products. Microsoft folds DLP into an E5 seat or a $12 Purview Suite add-on. Forcepoint and Symantec still sell modular suites for endpoint, network, email and cloud, and they will not show the number on a page.

Nightfall and Cyberhaven sell a SaaS seat for SaaS apps, browsers and GenAI paste, and they also wait for a call.

You are not choosing a classifier library. You are choosing which channels the tool can actually see, and whether the invoice is a Microsoft SKU you already own or a second vendor with a deployment project attached.

Top Picks

Based on features, real-world fit, and value for money.

Best Data Loss Prevention Software in 2026: 5 tools compared, updated Sep 2026
Tool	Pricing	Best for
Microsoft Purview DLP	From $12.00/user/mo (Purview Suite add-on on E3, paid yearly)	Microsoft 365 teams on E5, or E3 teams adding the $12 Purview Suite
Nightfall	Quote-only, per user per year; 7-day proof of value	Teams that need Slack, Google Drive, GitHub and AI paste covered, without an on-prem file share
Forcepoint DLP	Quote-only (cloud SaaS or on-prem)	Companies with file shares and a network that want one policy for email, web, endpoint and cloud
Symantec DLP	Quote-only (Core on-prem or Cloud suite)	Large companies on Symantec that need exact record and document matching, plus a DLP team
Cyberhaven	Quote-only, per endpoint per year	Teams asking where a file came from: source code, a design folder, or a departing laptop

Pricing read from each vendor's own published pricing page, checked Sep 2026. Every vendor here publishes a price.

Microsoft Purview DLP

Top Pick

Best for: Microsoft 365 teams on E5, or E3 teams adding the $12 Purview Suite

PricingFrom $12.00/user/mo (Purview Suite add-on on E3, paid yearly)

+List prices you can put in a budget without a sales call

+If E5 is already paid, turning DLP on is a policy job, not a procurement cycle

+Native on Exchange, SharePoint, OneDrive, Teams and Copilot, which is where a lot of the files already sit

−E5 at $60 is a whole productivity and security suite. Do not treat $60 as the DLP line

−Coverage outside Microsoft 365 is the weak side: Slack, GitHub, consumer ChatGPT and a personal Drive need other controls

Visit Microsoft Purview DLP →

Nightfall

Best for: Teams that need Slack, Google Drive, GitHub and AI paste covered, without an on-prem file share

PricingQuote-only, per user per year; 7-day proof of value

+API connectors for the SaaS apps Purview treats as someone else's problem

+Endpoint agent is meant to catch paste and upload into tools that have no API

+A 7-day proof of value on your own tenant, which is more useful than a slide

−The pricing page exists and still will not tell you the number. Budget from Vendr until you have a quote

−On-prem file shares and network DLP are not the product

Visit Nightfall →

Forcepoint DLP

Best for: Companies with file shares and a network that want one policy for email, web, endpoint and cloud

PricingQuote-only (cloud SaaS or on-prem)

+Same policy engine across endpoint, email, web and cloud, including on-prem, which Purview and Nightfall do not fully replace

+SaaS deploy if you do not want appliances; on-prem if the data cannot leave

+Risk-adaptive controls exist as an add-on if you want enforcement to change with user behaviour

−No list price, and the modules are easy to buy twice (endpoint plus cloud plus email)

−A hybrid rollout is a project. Plan months, not a weekend

Visit Forcepoint DLP →

Symantec DLP

Best for: Large companies on Symantec that need exact record and document matching, plus a DLP team

PricingQuote-only (Core on-prem or Cloud suite)

+Exact Data Matching and Indexed Document Matching are still the reason regulated shops keep it

+Core plus Cloud suites cover endpoint, network, email, web and sanctioned SaaS if you buy both

+MIP label enforcement from the endpoint agent, useful if Microsoft labels are already the source of truth

−Broadcom will not publish a seat price. Partner quotes and professional services are the real bill

−You need people who already know the product. A new team learning Symantec DLP is a long year

Visit Symantec DLP →

Cyberhaven

Best for: Teams asking where a file came from: source code, a design folder, or a departing laptop

PricingQuote-only, per endpoint per year

+Lineage is a different signal from a keyword hit, which is why people use it for IP and insider cases

+Covers modern egress (browser, SaaS, GenAI, USB) without an on-prem appliance

+Vendr's median is at least a budget number while you wait for a quote

−No public price list, and the high end of Vendr's range ($193,993) is a reminder that endpoint count moves the bill

−AI features may be a second line on the order form. Ask before you compare it to Nightfall Complete

Visit Cyberhaven →

What it is

DLP software watches data at rest, in motion and in use, then blocks, encrypts, quarantines or coaches when someone tries to send it somewhere policy does not allow. The old channels are email, web upload, USB and a file share.

The channels that now decide a bake-off are Slack, a personal Drive account, a ChatGPT paste and an AI coding agent.

Classification is regex and templates on the legacy suites, machine-learning detectors on Nightfall, and data lineage on Cyberhaven (where the file came from, not only what string it contains). The engines differ. The invoice differs more.

Why it matters

Five hundred Purview Suite seats are $72,000 a year on top of E3. Five hundred Forcepoint seats at the commonly cited $50 per user per year are $25,000, if that quote includes the modules you need, which it often does not. Those two numbers are not the same product.

Purview is already in the Microsoft tenant. Forcepoint is a second console, a policy rewrite and, on a hybrid estate, months of rollout.

The other reason is coverage. Purview is strong inside Microsoft 365 and weaker the moment the file hits Slack, a personal browser session or a consumer AI tool.

That gap is what Nightfall, Cyberhaven and the Forcepoint cloud modules exist to close. Buying a second DLP without listing the channels you actually lose data through is how teams pay twice and still miss USB.

Key features to look for

License shape

Bundled Microsoft SKU, modular enterprise suite, or per-user SaaS. This decides the three-year cost more than any classifier count.

Channels covered

Email and Office files, or also endpoint, web, USB, SaaS APIs and GenAI paste. A DLP that only sees Exchange is a mail filter.

What E3 already includes

Purview DLP for Exchange Online, SharePoint Online and OneDrive sits in E3. Endpoint DLP, insider risk and auto-labelling sit in Purview Suite or E5. Read that split before you buy a second vendor.

On-prem and hybrid

File shares, network taps and appliances are still Forcepoint and Symantec work. Nightfall and Cyberhaven are cloud-first. Purview is a Microsoft estate with some endpoint reach.

How it decides

Exact Data Matching and fingerprinting on the legacy suites, ML detectors on Nightfall, lineage on Cyberhaven. False-positive load is the operating cost nobody puts on the quote.

Pricing

Microsoft is the only vendor here that publishes a price: E5 and E3 are yearly per-user licenses, and the Purview Suite add-on is the printed way to buy the rest of the suite on E3. Nightfall, Forcepoint, Symantec DLP and Cyberhaven keep the number for a sales call.

The cheapest credible entry is the Purview Suite add-on at $12.00 per user per month, paid yearly, and E5 already includes that suite. Costs jump off Microsoft 365, where Nightfall's Vendr median is $25,000 a year and Forcepoint, Symantec and Cyberhaven are annual quotes.

Forcepoint and Symantec price modules separately, and Cyberhaven can bill AI apart from the endpoint license. Microsoft's published list is in USD and may vary by agreement, and VAT may apply.

Plan	Price	Best for
Microsoft Purview DLP E5	$60.00/user/mo, paid yearly	Includes DLP, information protection, insider risk, eDiscovery
Microsoft Purview DLP E3	$39.00/user/mo, paid yearly	DLP for Exchange, SharePoint and OneDrive only
Microsoft Purview Suite	$12.00/user/mo, paid yearly	Add-on needs E3 or Office 365 E3 plus EMS E3
Nightfall Complete	Custom quote	Per user per year; 7-day proof of value; 2 devices per user
Nightfall Complete + AI Agent Security	Custom quote	Per user per year; 150 GB included, then paid data packs
Nightfall (estimate, Vendr 2026 median)	$25,000/yr ($12,000-$73,200)	Median of 41 purchases, with the observed range
Nightfall (estimate, Vendr Business-tier list)	$20,000-$60,000/yr	Typical price for 100-300 users
Forcepoint DLP	Custom quote	SaaS or on-prem; endpoint, cloud/web, email, Risk-Adaptive Protection
Forcepoint DLP (estimate, Underdefense)	$30-$60/user/yr	Cited 2026 range, per user per year
Forcepoint DLP (estimate, Ciphers Security)	$40,000-$60,000/yr	Cited range for 1,000 seats
Symantec DLP	Custom quote	Core (on-prem) or CloudSOC CASB + DLP Cloud Detection, enterprise-only
Symantec DLP (estimate, Ciphers Security)	$50,000-$80,000/yr	2026 estimate for 1,000 seats
Cyberhaven	Custom quote	DDR SKU CYB-SW-DDR, per endpoint per year; AI billed separately
Cyberhaven (estimate, Vendr)	$37,872/yr ($30,000-$193,993)	Median annual contract and the observed range

Mistakes to avoid

×Buying Forcepoint or Symantec because a slide said 'enterprise DLP' when the company is already on E5 and the only real leak path is Outlook and OneDrive. The incremental Purview cost is $0. The second vendor is not.

×Treating Purview Suite's $12 as a DLP-only price, then being surprised that Slack, GitHub and a personal ChatGPT session were never in scope.

×Comparing a $50 per user per year Forcepoint blog estimate to Purview Suite at $144 per user per year as if both quotes included the same channels. Forcepoint's number is a cited range for DLP seats. Purview Suite is a published add-on that also buys insider risk and eDiscovery.

Expert tips

→If you are on E5, turn Purview DLP on and list the channels it cannot see before you take a second demo. The bake-off should be about Slack, USB and GenAI, not about email you already cover.

→On quote-only vendors, ask for the SKU list by channel (endpoint, email, web, cloud, RAP or AI add-on). Forcepoint and Symantec get expensive when each channel is a module. Cyberhaven gets expensive when AI is a second line.

→Use Vendr's Nightfall median ($25,000) and Cyberhaven median ($37,872) as a floor for the conversation, not as the purchase order. Both pages are quote-only on 1 September 2026.

The bottom line

If the estate is Microsoft 365, start with Purview DLP. E5 at $60 already includes it. E3 at $39 plus Purview Suite at $12 is the published path when you need more than Exchange and OneDrive DLP.

Do not buy a second product until you can name the channel Purview misses.

Nightfall is the SaaS and GenAI call when that channel is Slack, Drive or a paste into ChatGPT, and you can live with a per-user quote (Vendr median $25,000 a year).

Forcepoint and Symantec DLP are still the right tools for hybrid and on-prem, and they will not give you a number on a webpage; cite $30-$80 per user per year only as a 2026 third-party range.

Cyberhaven is the lineage product, quote-only, Vendr median $37,872 a year, and a poor substitute for a network DLP stack.

Frequently asked questions

What is the best DLP software in 2026?

Microsoft Purview DLP if you already pay for Microsoft 365 E5, or if E3 plus the $12 Purview Suite add-on covers the channels you care about. Nightfall if the leaks are in SaaS and GenAI and you are not running on-prem file shares. Forcepoint or Symantec DLP if you still have network and on-prem repositories. Cyberhaven if the question is data lineage and insider movement rather than a regex library.

How much does data loss prevention software cost?

Checked 1 September 2026 on Microsoft's security pricing pages: Purview DLP is included in Microsoft 365 E5 at $60 per user per month, or added via Microsoft Purview Suite at $12 per user per month on E3 ($39 per user per month). Nightfall, Forcepoint, Symantec DLP and Cyberhaven do not publish a list price. Vendr's Nightfall median is $25,000 a year; Vendr's Cyberhaven median is $37,872 a year. Third-party 2026 ranges for Forcepoint sit around $30-$60 per user per year, and for Symantec around $50-$80 per user per year at 1,000 seats. Those last two are cited estimates, not vendor quotes.

Is Microsoft Purview DLP enough on its own?

For email and Microsoft 365 files, often yes, especially on E5. It is not enough if people move source code through GitHub, paste customer lists into consumer ChatGPT, or copy files to USB and a personal Drive. Those are the cases that justify Nightfall, Cyberhaven or a Forcepoint cloud and endpoint module, not a second copy of Outlook DLP.

Forcepoint vs Symantec DLP vs Purview: which should we buy?

Purview if the work is inside Microsoft 365 and you can live with that scope. Forcepoint if you want one vendor across SaaS and on-prem and you will staff the rollout. Symantec DLP if you already depend on Exact Data Matching and have people who know the product. Do not buy two legacy suites. Do not buy a legacy suite to cover Outlook you already have in E5.

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