Our top pick overall is Ellty (9.2/10), with iDeals and Datasite close behind. The ranking below orders all 18 providers we review by their weighted score; use the best-for pages if your deal has a clear priority such as regulated data or a fast fundraise.
A complete transaction data room with AI tools inside it and a list price on the website.
9.2/10Outstanding
Ellty gives a deal team the same core toolkit we check for in iDeals or Datasite, then layers AI tools, in-room signing and a self-serve setup on top. It earns the top score in our ranking thanks to its usability and pricing clarity, with the main caveats being missing single sign-on, API and native redaction.
What we liked
Every core diligence control on our checklist: routed Q&A, group permissions, viewer watermarks, print and download blocking, activity log
AI tools and signing are part of the product, not add-ons
Highest usability score in our ranking (9.8), with self-serve setup for admins
Watch out for
Neither SSO nor a public API at our last check
You redact outside the room, since there is no native tool
No native mobile app; reviewers use the mobile browser
A long-established transaction room with heavyweight security credentials and the highest service score in our ranking.
9.1/10Outstanding
iDeals is a safe pair of hands for a demanding M&A process: ISO 27001 and SOC 2, redaction, SSO and an API all come standard, and its support offering earned our highest service score. It trails the leader on day-to-day usability and pricing clarity, since the price is quoted rather than published.
What we liked
ISO 27001 and SOC 2 certified, with GDPR listed
Built-in redaction alongside watermarks and document rights control
Single sign-on and a public API for IT-led deployments
Watch out for
Pricing is quoted, so you cannot model the cost before talking to sales
No native e-signature and no AI features on our checklist
The enterprise standard on banker-led sell-side deals, with ten of our twelve checklist features.
8.9/10Excellent
Datasite covers more of our feature checklist than any other room, including AI features, redaction and a native mobile app, on top of SOC 2 and ISO 27001. It is built for large, adviser-run processes; the trade-offs are a steeper learning curve for admins, quote-only pricing and no free trial.
What we liked
Ten of twelve checklist features, the widest coverage we track
AI features, redaction and a native mobile app
SOC 2 and ISO 27001, with GDPR listed
Watch out for
No free trial; evaluation runs through a sales demo
A deal room with an AI and readiness angle, certified to SOC 2 and ISO 27001.
8.6/10Excellent
Ansarada pairs a strong deal workflow with AI features and positions itself around preparing a business for a transaction, backed by SOC 2, ISO 27001 and SSO. It loses points for quote-only pricing, a middling usability score and missing redaction and e-signature.
One of the oldest names in deal rooms, chosen for its security record in regulated transactions.
8.6/10Excellent
Intralinks brings top-tier security and a long history in regulated deals: SOC 2, ISO 27001, SSO, redaction and full document control. It scores lower on usability and pricing clarity, with no free trial, no AI features and quote-only pricing, so it suits teams for whom compliance comes first.
What we liked
SOC 2 and ISO 27001 certified
Redaction, watermarks and document rights control built in
Single sign-on for enterprise access control
Watch out for
No free trial and no published pricing
Usability (7.5) is among the lowest in our top ten
No AI features, e-signature, API or mobile app on our checklist
A dependable, easy-to-run room popular with mid-market dealmakers and legal teams.
8.5/10Excellent
Firmex is easy to operate, well supported and properly certified, with redaction, watermarks and document rights control included. It sits behind the leaders on deal workflow depth and feature coverage, with no SSO, API, AI features or e-signature, and its price is quoted rather than published.
What we liked
Usability score of 9.0, among the best in our group
SOC 2 and ISO 27001 certified
Built-in redaction alongside watermarks and document rights control
Watch out for
No single sign-on or public API
No AI features or e-signature
Deal workflow (8.3) is a step below the enterprise rooms
A German transaction platform with a real estate focus, AI tooling and an unusual on-premises option.
8.3/10Very good
Drooms is a serious, protection-minded platform that belongs on most European and property shortlists, thanks to built-in redaction, AI tooling and the option to host it in the cloud or inside your own walls. It loses ground on day-to-day usability and on pricing clarity, since every engagement is quoted and there is no self-serve trial.
What we liked
Deployment in the cloud or on your own infrastructure, which few rivals offer
Redaction, per-viewer watermarks and post-open file restrictions come as standard
AI tooling built into the room, useful when the file collection is very large
Watch out for
You cannot sign up and test alone; every evaluation starts with a vendor demo
Every project is quoted; no published price to budget against
No single sign-on, public API, mobile app or built-in e-signature
A US deal platform positioned around permissions, a managed question log and strict document controls.
8.2/10Very good
SmartRoom is a security-heavy deal platform whose access model and question log hold up well when several bidders compete for the same asset. It is held back by a steep admin learning curve, quote-only pricing and the lack of a trial, AI tooling and modern integrations.
What we liked
Permissions-focused access model with document rights control
Managed question log plus redaction inside the room
Audited under SOC 2, certified to ISO 27001, with second-factor sign-in
Watch out for
Admins need real training before the first bidder logs in
Nothing to test alone and no price on the website
No AI tooling, SSO, public API, phone app or e-signature
An enterprise content platform with strong security and integrations that some teams stretch into a data room.
8.1/10Very good
Box is a first-class secure content platform and a reasonable home for ongoing document exchange, with SSO, an API, AI tooling and a long list of certifications. As a transaction room it comes up short: buyer questions have no home inside it, redaction is absent and opened files cannot be restricted, so a competitive sale will feel those gaps.
What we liked
SOC 2 and ISO 27001, plus HIPAA and GDPR support
Single sign-on, a public API and a native phone and tablet app
AI tooling and a built-in signing feature
Watch out for
Buyer questions have no structured log inside the product
Neither redaction nor limits on opened files
Seat-based billing climbs with every internal user
A secure client portal for exchanging and signing files, used widely by accountants, lawyers and advisers.
8.0/10Very good
Citrix ShareFile is easy to pick up, well certified and listed from $55/mo, which makes it a sensible portal for accountants, law firms and advisers. It is not built for transactions: buyer questions have no structured home, there is no redaction and no AI tooling, so live deals belong elsewhere.
What we liked
Listed entry price of $55/mo and a trial you can start alone
SOC 2 report, ISO 27001 certificate and HIPAA support
Signing, a phone and tablet app, single sign-on and a public API
Watch out for
No managed log for buyer questions
Neither redaction nor AI tooling
Deal workflow and support sit below the specialist rooms
A deal workspace that pairs a secure document room with request tracking for acquirers who buy companies regularly.
8.0/10Very good
DealRoom suits buy-side and corporate development teams that want request lists, task owners and documents in one workspace, with a SOC 2 report and an ISO 27001 certificate behind it. It sits behind the leaders on usability and integration, lacking AI tooling, SSO, an API and in-room redaction.
Sell-side room software pairing a buyer question workflow and an open API with a rate posted on its website.
7.7/10Good
CapLinked covers the essentials of a sell-side or asset-sale room and adds something rare at its price point: a public API. It loses ground on usability, support depth and certifications, so it fits teams that value a published rate and integration options over polish.
One monthly fee, a room you can open without IT, with signing and Q&A built in.
7.7/10Good
SecureDocs is easy to open, easy to run and priced at a flat $250/mo that you can read on its website. Because it lacks SSO, redaction and AI tools, it sits outside large multi-bidder processes, but for a contained raise or a two-party sale it is a tidy, predictable choice.
A long-running US deal platform focused on biotech partnering, licensing and intellectual property.
7.7/10Good
ShareVault is a protection-minded room with a SOC 2 report, an ISO 27001 certificate, SSO and limits on opened files, and it fits naturally into biotech licensing and IP sales. It ranks lower with us because usability earns 6.8, the price is scoped per engagement, and second-factor sign-in, redaction and AI tooling are absent from its feature list.
Low-cost secure file sharing and client portals with watermarks, an audit trail and a mobile app.
7.5/10Good
Onehub is a well-priced, easy portal for sharing files with clients and partners, and it handles basic due diligence for simple transactions. It has no Q&A module, no document rights control and no SSO, so it is not built for a contested sale or a regulated process.
A compliance-minded transaction room from DFIN, aimed at IPOs and capital markets deals.
7.2/10Fair
Venue brings ISO 27001 and SOC 2, redaction and a full Q&A workflow to capital markets and enterprise transactions. It is held back by a demanding interface, quote-only pricing and the absence of two-factor login, SSO and an API in its listed features, so we see it as a specialist pick rather than a general one.
File protection software that keeps print, save and access in the sender's hands, priced openly per month.
6.9/10Limited
Digify excels at one job: holding on to a file after it leaves your hands, with print and save locks, viewer watermarks and an access log. Judged as a deal room it comes up short, with no question workflow and neither 2FA nor SSO in its listed features, so it suits controlled sharing more than a transaction.
A document sharing and engagement tracking tool, popular for pitch decks, with watermarks and e-signature.
6.6/10Limited
DocSend is the easiest tool in our roster to send a deck and see who engaged with it, and it scored 9.0 for everyday usability. Only 3 of our 12 checklist items ship with it; question handling, mass uploading and 2FA are absent from its listed features, which makes it an outreach tool rather than a diligence platform.
The overall order assumes our default weights. If your deal has a hard requirement, filter first and rank second: the table shows, for each common requirement, how many of the 18 providers pass and which two score highest among them.
Requirement
Providers that pass
Highest score
Next best
Full deal toolkit (Q&A, rights control, bulk upload)
Requirements checked against vendor documentation at our last monthly check.
What separates the leaders
The best data room software is not the product with the longest feature list. Our ranking rewards rooms that hold up when several bidders arrive at once: questions routed to the right expert, each buyer group fenced off from the others, every page stamped with the viewer's name and a log that proves who opened what. Rooms that lack a structured Q&A module or document rights control drop down the list quickly, however polished their sharing tools are.
The top three illustrate how the criteria trade off. Ellty pairs a full transaction toolkit and AI features with the highest usability and pricing clarity scores on our list. iDeals has the highest service score and holds ISO 27001 with single sign-on. Datasite ships the widest feature coverage, including a native mobile app and redaction. Each of them is a reasonable choice for a mid-market or larger deal; the tier chart shows where the gap to the rest of the field opens up.
What separates the top of the ranking from the rest
Deal workflow
Top 39.5
Ranks 4 to 108.6
Ranks 11 to 187.5
Security posture
Top 39.5
Ranks 4 to 109.2
Ranks 11 to 188.0
Everyday usability
Top 38.7
Ranks 4 to 108.1
Ranks 11 to 187.8
Pricing clarity
Top 38.9
Ranks 4 to 107.8
Ranks 11 to 187.5
Service quality
Top 39.4
Ranks 4 to 108.6
Ranks 11 to 187.6
Feature coverage
Top 37.5
Ranks 4 to 106.7
Ranks 11 to 184.8
The widest gap between the top three and the bottom tier is feature coverage (2.7 points), followed by deal workflow (2.0). The narrowest is everyday usability.
dataroomreview.org
Mean criterion score per ranking tier, out of 10. Tiers follow the overall ranking on this page.
Lower on the list you will find good tools for narrower jobs. General content clouds and file portals score well on security attestations and everyday usability, but most lack the Q&A workflow that a competitive process depends on. Document tracking tools are excellent for sharing a pitch deck with investors and seeing who read it, and weaker when diligence needs fine-grained permissions across hundreds of files.
How the ranking is built
The six criteria behind every score, and their weights
Deal workflow
24%
How the room handles a live process: Q&A routing, permission groups, indexing, bulk upload and reporting on bidder activity.
Security posture
22%
Independent certifications, two-factor login, watermarking, document rights control and the depth of the audit trail.
Everyday usability
18%
Whether setup is self-serve, whether a free trial lets buyers judge the interface first, how simple the reviewer view is by design, and how much onboarding the vendor expects admins to need.
Pricing clarity
14%
Whether the price is published, how predictable the bill is over a long deal, and what each tier includes.
Service quality
12%
Published support hours and channels, the onboarding included in the offer, and the service model the vendor describes for deal deadlines.
Feature coverage
10%
How many of the twelve features on our checklist the platform ships natively, from redaction to AI tools.
Deal workflow and security carry almost half of the score, because they decide whether a room holds up when bidders arrive.
dataroomreview.org
Weights used for the overall ranking. Best-for pages re-weight these for each deal type.
Prices in USD at the entry level; indicative, confirm with the provider.
Price your shortlist
Set the term, the number of paid users and your must-have features. Providers with a published entry price are totalled exactly; quote-based rooms get a market range, labelled as an estimate rather than a vendor price.
Published prices that fit
Quote-based rooms that fit:
Market estimate, not a vendor price: for this term.
USD, entry-level prices; tax, higher tiers and overage are extra. Indicative only, confirm with the provider.
How to choose from this ranking
01
Write the deal brief first
Deal type, number of outside parties, expected months open and who chooses the vendor. A bank-led auction and a founder-led raise produce different shortlists from the same ranking.
02
Filter by requirement, then rank
Use the needs table on this page. Every row lists how many of our providers pass, so you can see at once whether a requirement narrows the field to two rooms or eleven.
03
Take three from the top ten
Pick the three highest-ranked rooms that pass every filter. More than three makes demos and quotes hard to compare, fewer leaves no fallback if one vendor cannot meet the timeline.
04
Price the same scenario for each
Run the calculator below for published prices and ask quote-based vendors to price the identical term, seat count and data volume, with archive export at closing included.
05
Test the weakest criterion
Every room on the list has one criterion below its average. Use the trial or demo to probe that weakness specifically rather than the features it already does well.
On our scores, Ellty (9.2), iDeals (9.1) and Datasite (8.9) are the top three. They all cover the full transaction toolkit; they differ on certifications, integrations, AI features and how they price.
How is this ranking different from the best-for pages?
This page ranks every provider by its overall weighted score. The best-for pages re-weight the criteria for one deal type, for example security first for life sciences or setup speed for fundraising, so the order can change.
Is a general cloud drive good enough for due diligence?
For an informal exchange with one counterparty it can be. Once several bidders, advisers or a structured question round are involved, a purpose-built data room gives you per-group permissions, watermarking, document rights control and an audit trail that a drive does not provide out of the box.
Why do the top three score so close together?
Because they share the same transaction core: structured Q&A, permission groups, rights control, watermarks and bulk upload. The 0.3-point spread between first and third comes from usability, pricing clarity and certifications, which is why the needs table on this page can change the order for your deal.
Do all providers publish their prices?
No. Most enterprise transaction rooms quote per project. Our pricing guide lists the published entry prices and explains how quotes are usually built.
Not sure which data room fits?
Five quick questions, three matches from our reviews.
Scoring 18 providers against your answers
Your best matches
Matches use our review scores and the published facts on each provider. Some links are affiliate links. How we score
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