Best data room software for investment banks and M&A advisers
An adviser opens the room on behalf of a client, runs several bidders through it and answers for anything that goes wrong. Ellty, Datasite and iDeals lead our ranking for that job, with Intralinks, SmartRoom and Venue as established options for larger or listed-company mandates.
A complete transaction data room with AI tools inside it and a list price on the website.
9.2/10Outstanding
Ellty gives an adviser bidder groups, routed Q&A with approval steps, per-viewer watermarks, document rights control and a full audit trail, plus AI features that help a deal team index and summarise a large upload. The price is listed from $149/mo, so a boutique can include it in an engagement letter without waiting on a quote.
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
The enterprise standard on banker-led sell-side deals, with ten of our twelve checklist features.
8.9/10Excellent
Datasite covers ten of our twelve checklist features, including redaction, single sign-on, a mobile app and AI features, and its focus areas in our records include investment banking and analytics. It quotes per project and is demo only.
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 long-established transaction room with heavyweight security credentials and the highest service score in our ranking.
9.1/10Outstanding
iDeals holds SOC 2, ISO 27001 and GDPR, with redaction, single sign-on and an API. Its service score of 9.7 is the highest we record, useful when bidders sit in several time zones.
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
One of the oldest names in deal rooms, chosen for its security record in regulated transactions.
8.6/10Excellent
Intralinks scores 9.6 on security and holds SOC 2 and ISO 27001, with redaction and single sign-on. It is quote-only, lacks AI features in the facts we track and scores lower on usability.
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 US deal platform positioned around permissions, a managed question log and strict document controls.
8.2/10Very good
SmartRoom's stated focus areas are permissions, Q&A and security, and it includes redaction and two-factor login. It quotes per project and does not list single sign-on.
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
A compliance-minded transaction room from DFIN, aimed at IPOs and capital markets deals.
7.2/10Fair
Venue by DFIN is aimed at capital markets and IPO processes, with Q&A, redaction and document rights control. It does not list two-factor login or single sign-on, so check that against your bank's policies.
What we liked
ISO 27001 and SOC 2 certification
Built-in redaction alongside Q&A, watermarking and document rights control
Positioned around IPOs, capital markets and compliance-heavy work
Watch out for
No published price; every project is quoted
Everyday usability scored 6.0, the lowest in our roster
No two-factor login, single sign-on or public API listed
Prices in USD at the entry level; indicative, confirm with the provider.
Running a room you do not own
An investment bank or M&A boutique is in an unusual position. The documents belong to the client. The bidders belong to nobody, and some of them are the client’s competitors. The adviser sits in the middle, setting permissions, chasing management for answers, and reporting to the client on which buyers look serious. If the wrong spreadsheet reaches the wrong bidder, the adviser’s name is on the mistake.
That is why bidder management and Q&A volume take more than half of the weighting here. A room that is pleasant for a single buyer can buckle under a dozen bidder groups each sending forty questions a week.
How the picks compare
Provider
Score
Redaction
Single sign-on
AI features
Trial
Entry price
Ellty
9.2
No
No
Yes
14 days
$149/mo
Datasite
8.9
Yes
Yes
Yes
Demo
Quote
iDeals
9.1
Yes
Yes
No
Yes
Quote
Intralinks
8.6
Yes
Yes
No
Demo
Quote
SmartRoom
8.2
Yes
No
No
Demo
Quote
Venue by DFIN
7.2
Yes
No
No
Demo
Quote
Datasite ranks above iDeals here despite a slightly lower overall score: its feature coverage and investment banking focus count for more in a bank-run auction. Read the Datasite review and the Datasite vs Intralinks head-to-head for the large-deal view.
A launch sequence for advisers
1
Agree ownership in the engagement letter
Name who signs the vendor contract, who pays, and who receives the archive after closing.
2
Build the index with management
Map the folder structure to the information memorandum so bidders can find the support for each section.
3
Create one group per bidder
Give each bidder its own permission group and Q&A queue, even if two bidders start with identical access.
4
Route questions to named experts
Assign finance, legal, HR and tax questions to client staff, with the adviser approving every answer before release.
5
Rehearse as a bidder
Log in as a test bidder, check the watermark, open a restricted folder and export the activity report.
Where advisers get caught out
Releasing a document to all groups by default is the classic error. Set new uploads to hidden until someone assigns permissions. Another is answering a question for one bidder that should go to all; decide at the start which answers become general disclosures. A third is the redaction gap. Ellty, Ansarada and DealRoom do not list native redaction, so a team using one of them should redact in a separate tool before upload, which works but adds a step.
Second round access
When the field narrows, do not simply open more folders to the remaining bidders. Create a second-round group, move the finalists into it, and keep first-round groups closed so dropped bidders lose access cleanly.
Budget the client will sign off
A boutique can quote Ellty’s listed rate in the engagement letter: a five-month auction comes to about $745 at the entry price. The other five quote per project, and large-bank pricing often depends on page or data volume, bidder numbers and term. Ask each vendor for a quote on the same scope and for the monthly extension rate, because auctions slip. The pricing guide explains the variables, and the M&A shortlist covers the same process from the seller’s own side.
Frequently asked questions
Which data room do investment banks use?
Large banks often run auctions on Datasite or Intralinks, which both hold SOC 2 and ISO 27001. Boutiques and mid-market advisers increasingly use rooms with listed pricing and self-serve setup, such as Ellty, alongside iDeals.
Who pays for the data room in a sell-side mandate?
Usually the client, either directly or as a disbursement on the adviser's invoice. Agree in the engagement letter who signs the contract and who owns the room after closing.
What should an adviser check before launching a room to bidders?
Log in as a test bidder in each group, confirm the watermark and permissions, raise and approve a test question, and export the audit trail. Do this before the process letter goes out, not after the first bidder logs in.
Do investment banks need AI features in a data room?
They are not essential, but they help with the heavy work of indexing and summarising a large upload. Ellty, Datasite and Ansarada list AI features; iDeals, Intralinks, SmartRoom and Venue do not in the facts we track.
