Due diligence software
Document review for any transaction or investment, built around request lists, search and an evidence trail. Process, documents, security points, a ranking of 18 platforms and cost guidance. Updated October 2026.
Due diligence software is the working layer under any transaction review: it stores the evidence, tracks what has been requested and shows who has read what. The best platforms turn a request list into a living checklist, so both sides can see what is still outstanding without a weekly status call.
For this page we weight AI and automation higher than on the overall ranking. Review teams now expect help with indexing, search across thousands of pages and first-pass summaries, and those features change how many hours a review takes.
How the process runs
Due diligence starts with a request list: legal, financial, tax, commercial and technical questions grouped by workstream. The target uploads documents against each request, reviewers read them and raise follow-up questions, and the list slowly moves from open to closed. On a mid-sized deal the list can run to several hundred lines across five or six advisory firms.
The software decides how much of that tracking happens inside the room and how much in spreadsheets. Search quality matters because reviewers look for clauses (change of control, exclusivity, termination) across hundreds of contracts. AI features help with first-pass sorting and summaries, but the findings still go into a report written by people.
Stages of a typical due diligence process
Request list
Workstreams issue requests; target maps documents to each line.
Upload and index
Bulk upload into the agreed index, gaps flagged.
Review
Advisers read, search and raise follow-up questions.
Report
Findings written up; room kept as the evidence base.
What the software has to do
- Request tracking
- A way to map each diligence request to the documents that answer it, with status visible to both sides.
- Search that reads the files
- Full-text search across scanned PDFs and spreadsheets, so reviewers find a clause without opening every file.
- AI assistance
- Auto-indexing, document summaries or suggested answers, listed by the vendor and switchable per room.
- Evidence trail
- An audit log that proves which documents were disclosed and when, useful if a warranty claim follows.
Documents the room usually holds
A starting point for the index. Number the top-level folders and keep the numbers stable once guests are in.
- Request list with workstream owners
- Constitutional documents and approvals
- Financial statements and working papers
- Contracts with change-of-control or exclusivity terms
- Employment and pension documents
- IT, data protection and security policies
- Environmental, health and safety records
- Insurance policies and claims history
Security and compliance points
- Reviewer roles
- Separate groups per advisory firm, so each team sees its own workstream folders.
- Download limits
- View-only for the most sensitive documents keeps the audit trail meaningful.
- AI data handling
- Know where AI features process documents and whether they can be switched off per room.
- Retention
- Keep the room or its archive for the warranty and limitation period your lawyers advise.
Ranking for due diligence
All 18 platforms, scored on the six criteria with this page's weights (deal workflow coverage 30%, security controls 20%) plus up to 0.3 for vendor positioning.
| # | Platform | For due diligence | Overall fit score | Workflow | Security | Entry price | |
|---|---|---|---|---|---|---|---|
| 1 |  ElltyVirtual data room | 9.08 | 8.7 | 9.0 | 8.4 | $149/mo | Visit Ellty |
| 2 |  DatasiteVirtual data room | 8.89 | 8.5 | 9.7 | 9.7 | Quote | Profile |
| 3 |  iDealsVirtual data room | 8.71 | 8.3 | 9.7 | 9.7 | Quote | Profile |
| 4 |  AnsaradaVirtual data room | 8.57 | 8.2 | 9.0 | 9.4 | Quote | Profile |
| 5 |  DroomsVirtual data room | 8.41 | 7.9 | 9.3 | 9.4 | Quote | Profile |
| 6 |  IntralinksVirtual data room | 7.98 | 7.7 | 9.6 | 9.7 | Quote | Profile |
| 7 |  BoxFile-sharing platform | 7.87 | 8.1 | 5.3 | 9.2 | $15/user | Profile |
| 8 |  FirmexVirtual data room | 7.84 | 7.5 | 9.0 | 9.2 | Quote | Profile |
| 9 |  SmartRoomVirtual data room | 7.61 | 7.2 | 9.3 | 9.4 | Quote | Profile |
| 10 |  CapLinkedVirtual data room | 7.58 | 7.4 | 8.3 | 7.5 | $299/mo | Profile |
| 11 |  DealRoomVirtual data room | 7.40 | 7.1 | 8.6 | 9.0 | Quote | Profile |
| 12 |  SecureDocsVirtual data room | 7.39 | 7.5 | 7.5 | 7.1 | $250/mo | Profile |
| 13 |  Citrix ShareFileFile-sharing platform | 7.27 | 7.6 | 5.7 | 9.0 | $55/mo | Profile |
| 14 |  ShareVaultVirtual data room | 7.21 | 7.1 | 8.3 | 9.2 | Quote | Profile |
| 15 |  Venue by DFINCapital markets room | 6.92 | 6.7 | 8.8 | 8.8 | Quote | Profile |
| 16 |  OnehubFile-sharing platform | 6.33 | 6.6 | 4.7 | 6.8 | $15/mo | Profile |
| 17 |  DigifyDocument tracking tool | 5.89 | 6.0 | 5.1 | 6.8 | $120/mo | Profile |
| 18 |  DocSendDocument tracking tool | 5.29 | 5.5 | 3.4 | 6.3 | $45/user | Profile |
Values out of 10 plus the positioning bonus. Criterion scores out of 10. Prices in USD, indicative.
Weights for Due diligence against the default
Key features for this work
- Q&A workflow
- Buyers post questions inside the room; the seller routes, answers and publishes them with a full record.
- Activity log
- A log of who opened, downloaded or printed which file and when, exportable for the deal record.
- Bulk import
- Drag whole folder trees into the room with structure and numbering kept.
- AI assistance
- Machine assistance listed by the vendor, such as auto-indexing, summaries, document search or Q&A help.
- In-app redaction
- Black out personal data or privileged passages inside the room instead of re-uploading edited files.
- File-level access rights
- Per-file control over view, print and download, sometimes with view-only or expiring access.
2 of 18 platforms list all 6 of these features: Datasite, Drooms.
Key features, ten highest ranked for due diligence
| Q&A | Audit log | Bulk upload | AI | Redact | Rights | Listed | |
|---|---|---|---|---|---|---|---|
| Ellty | 5/6 | ||||||
| Datasite | 6/6 | ||||||
| iDeals | 5/6 | ||||||
| Ansarada | 5/6 | ||||||
| Drooms | 6/6 | ||||||
| Intralinks | 5/6 | ||||||
| Box | 3/6 | ||||||
| Firmex | 5/6 | ||||||
| SmartRoom | 5/6 | ||||||
| CapLinked | 4/6 | ||||||
| Platforms listing it | 9 | 10 | 10 | 5 | 6 | 9 |
Questions to ask the vendor
- Can requests be tracked in the room with status visible to both sides?
- Does search read scanned PDFs and spreadsheets?
- Which AI features are included, and can they be disabled for some groups?
- Can the audit log be filtered by reviewer and exported?
- How many advisory firms can have separate groups at no extra cost?
Evaluation checklist
Run these in a trial room or a demo with a folder of real documents.
- Load a real request list
Import or rebuild twenty lines of your request list and link documents to them.
- Search a scanned file
Upload a scanned contract and search for a phrase on page five.
- Run the AI features on sample files
Compare a summary with the source document and check whether it cites pages.
- Set up two adviser groups
Give legal and financial advisers different folders and confirm what each sees.
- Export the log
Pull the activity export filtered by one reviewer.
- Confirm retention terms
Ask how long the archive is kept and in what format it is delivered.
Mistakes to avoid
- Treating the request list and the room as two systems that someone reconciles by hand every evening.
- Turning on AI features without checking where documents are processed and whether the vendor trains on them.
- Letting reviewers download everything, which defeats the audit trail the room exists to keep.
What it costs
Review rooms are often shorter than sale rooms but carry more internal users. On per-user plans the adviser count drives the bill, so count every firm that needs a seat.
| Pricing model | Platforms | Total for 4 months | Basis |
|---|---|---|---|
| Flat monthly plan | 6 | $96 to $1,914 | Published entry price scaled for a competitive process, 4 months |
| Per user | 2 | $600 to $1,800 | Published seat price x 10 seats, 4 months |
| Quote per project | 10 | $7,200 to $22,000 | Our market band for a competitive process, 4 months (estimate) |
Indicative USD. Published prices come from vendor pages; quote-only platforms are shown as our labelled market band, never as a vendor price. The calculator below starts from this page's typical room; change any input.
USD estimates for planning; each vendor confirms its own figure. Flat plans grow with room size from the listed starting price. Platforms that quote per project show the middle of our market band for that size, labelled "estimate", and never an invented vendor price.
More on models, hidden costs and negotiation in the pricing guide.
Frequently asked questions
Is due diligence software the same as a virtual data room?
Mostly. A virtual data room is the core of due diligence software; fuller platforms add request tracking, Q&A, reporting and AI review on top of secure document storage.
Does AI in due diligence software replace lawyers?
No. Current AI features speed up sorting, searching and first-pass summaries. Judgement on what a clause means for the deal still sits with the review team.
What should a buyer check before relying on AI summaries?
Ask where processing happens, whether customer files train any model, whether AI can be switched off per room, and whether AI actions appear in the audit trail.
What is the difference between a due diligence room and an M&A room?
Mostly the emphasis. A due diligence room is built around reviewing documents against requests, with search and reporting. An M&A room adds bidder separation and staged access for a competitive sale.
Can AI replace manual document review?
No. It can sort, search and summarise, which shortens the first pass. Reviewers still read the documents that matter and sign off the findings.