Sifrsys is an AI-native virtual data room and secure content intelligence platform. It is used for M&A due diligence, fundraising, board portals, investor relations, client portals, and any workflow requiring secure document sharing with AI-powered intelligence. Ask questions about your documents and get cited answers — the AI only retrieves from documents within each user's permission boundary.

Is my data used to train AI models?

No. Your documents, queries, and AI conversations are never used to train AI models — ours or our providers'. Conversation history is stored encrypted inside your own data room, governed by the same Row-Level Security as your documents.

What can I use Sifrsys for?

Sifrsys is used for M&A due diligence data rooms, startup fundraising, board portals and investor reporting, law firm client portals, VC deal flow management, legal discovery rooms, real estate transactions, and any scenario requiring secure document sharing with AI intelligence. The platform adapts to any use case involving sensitive documents and multiple stakeholders.

How is Sifrsys different from traditional virtual data rooms?

Traditional VDRs store and share documents securely but lack intelligence. Sifrsys adds permission-fenced AI document Q&A with cited answers, Room Intelligence AI deal advisor, page-level engagement analytics, and branded white-label portals on top of full VDR security features like 5-level permissions, dynamic watermarking, and tamper-proof audit trails. No per-page fees.

What security features does Sifrsys have?

Sifrsys includes AES-256 encryption at rest, TLS encryption in transit, row-level database security that enforces AI permission boundaries, hash-chained tamper-proof audit logs, two-factor authentication, 5-level granular permissions (none, fence, view, download, full), and dynamic watermarking on document views and downloads.

Can I use Sifrsys as a board portal?

Yes. Sifrsys works as a board portal with branded portals for each board, engagement analytics showing who read board materials, AI Q&A so board members can ask questions about documents, granular permissions to control what each member sees, and a complete audit trail for governance compliance. It is significantly more affordable than enterprise board portal software.

Does Sifrsys charge per page?

No. Sifrsys uses flat monthly pricing with no per-page fees, no per-user fees, and no overage charges. Plans start free (1 room, 100 MB, AI included) and scale to enterprise. Unlike legacy VDRs that charge $0.50–2.00 per page, Sifrsys pricing is predictable.

How quickly can I set up a data room?

You can create a data room and start uploading documents within minutes. Documents are automatically parsed and indexed for AI retrieval. Invite participants with passwordless magic link access — they click a link and are in immediately. No sales call required to get started.

Can I use Sifrsys for fundraising?

Yes. Startups use Sifrsys data rooms to share pitch decks, financials, and legal documents with investors. Engagement analytics show which investors are most engaged with your materials. Permission groups let you share different materials with different investor tiers. AI Q&A helps investors find answers without back-and-forth emails.

What is Room Intelligence?

Room Intelligence is an AI deal advisor built into every data room. It tracks who viewed what documents and for how long, identifies which contacts at which organizations are most engaged, detects when parties go cold, and generates automatic engagement alerts. You can ask it natural-language questions like 'Which buyer group is most engaged this week?' and get data-backed answers.

Can I use Sifrsys as a client portal for my law firm?

Yes. Law firms use Sifrsys as a branded client portal. Clients can ask AI questions about their case documents and get cited answers, reducing routine calls. The portal appears under your firm's brand with custom subdomain, logo, and colors. The audit trail and watermarking meet compliance requirements, and granular permissions control what each client sees.

Datasite Alternative

Datasite charges by the page. Sifrsys answers by the question.

Datasite is the enterprise M&A incumbent — with per-page pricing and no AI document chat. Sifrsys is an AI-native data room: ask questions in plain language, get answers with clickable citations to the exact page or cell, on flat plans with no per-page fees.

Start Free See the Comparison

No per-page feesAI included, not extraFree tier, no credit cardEvery AI answer cited

Why Teams Look Beyond Datasite

Three reasons deal teams evaluate alternatives.

Datasite earns its enterprise reputation — and these are the gaps its own reviewers and pricing model point to.

The Per-Page Meter

Roughly $0.60 per page uploaded, extra charges for Excel and media files, and setup fees on top. "Terrible pricing structure, at a cost per page," as one reviewer puts it. On a 10,000-page deal, per-page fees alone can pass $6,000.

No AI Document Chat

As of mid-2026, Datasite's AI covers redaction, auto-categorization, and OCR — but you still read the documents yourself. There's no assistant that answers questions from your data room with citations.

Legacy Friction

Reviewers cite an Excel viewer that's "difficult to use," time-consuming file-by-file navigation, manual Q&A linking, and a "need for more modern UI." Finding every change-of-control clause is still a manual reading job.

Sifrsys vs Datasite

An honest feature comparison.

Where Datasite is strong, we say so. Competitor details as of mid-2026, from public sources and verified reviews.

	Datasite	Sifrsys
AI document chat	✗ Not available (as of mid-2026)	✓ RAG chat with cited answers, every plan
AI citations	✗ Not available	✓ Clickable — exact page or spreadsheet cell
Permission-fenced AI	✗ No AI to fence	✓ AI retrieval bounded by DB-level permissions
AI redaction	✓ Industry-leading, in production	✗ Not offered
Auto-categorization	✓ AI-powered due diligence indexing	✗ Not offered
Excel (XLSX) handling	~ Extra fees; viewer draws review complaints	✓ Parsed, AI-indexed, cited to the exact cell
Pricing model	✗ Per-page (~$0.60/page), quote-based	✓ Flat plans: $0 / $399 / $999 / custom
Setup fees	✗ Typically $500–$2,500	✓ None — free Starter, no credit card
Certifications	✓ First ISO 27001 certified VDR provider	✗ Not yet certified
Support	✓ 24/7 team, praised in reviews	~ Email support, priority on Pro+
Multi-language OCR	✓ AI text extraction across languages	~ English interface, no translation
Enterprise track record	✓ 55+ years; a third of top 100 global deals (2023)	~ Newer product, building its track record

AI document chat

✗ Datasite: Not available (as of mid-2026)

✓ Sifrsys: RAG chat with cited answers, every plan

AI citations

✗ Datasite: Not available

✓ Sifrsys: Clickable — exact page or spreadsheet cell

Permission-fenced AI

✗ Datasite: No AI to fence

✓ Sifrsys: AI retrieval bounded by DB-level permissions

AI redaction

✓ Datasite: Industry-leading, in production

✗ Sifrsys: Not offered

Auto-categorization

✓ Datasite: AI-powered due diligence indexing

✗ Sifrsys: Not offered

Excel (XLSX) handling

~ Datasite: Extra fees; viewer draws review complaints

✓ Sifrsys: Parsed, AI-indexed, cited to the exact cell

Pricing model

✗ Datasite: Per-page (~$0.60/page), quote-based

✓ Sifrsys: Flat plans: $0 / $399 / $999 / custom

Setup fees

✗ Datasite: Typically $500–$2,500

✓ Sifrsys: None — free Starter, no credit card

Certifications

✓ Datasite: First ISO 27001 certified VDR provider

✗ Sifrsys: Not yet certified

Support

✓ Datasite: 24/7 team, praised in reviews

~ Sifrsys: Email support, priority on Pro+

Multi-language OCR

✓ Datasite: AI text extraction across languages

~ Sifrsys: English interface, no translation

Enterprise track record

✓ Datasite: 55+ years; a third of top 100 global deals (2023)

~ Sifrsys: Newer product, building its track record

Where Datasite is genuinely strong

Datasite has 55+ years of history, holds the #1 G2 Grid position in the VDR category (Spring 2025, 4.5/5 across 260+ reviews), was the first ISO 27001 certified VDR provider, and facilitated a third of the top 100 global deals in 2023. It's used by 74 of the top 100 global law firms and all top 20 global financial advisory firms, and its AI redaction and auto-categorization are industry-leading. If a mega-deal demands that infrastructure and advisor network, Datasite is a credible pick. Sifrsys is for teams that want AI document chat legacy VDRs don't have — without a per-page meter running.

Pricing Model

Per-page fees vs. flat plans.

Datasite pricing is quote-based and per-page (~$0.60/page as of mid-2026), with extra charges for Excel and media files and setup fees typically $500–$2,500. Sifrsys publishes flat plans with AI included in all of them.

Sifrsys: Starter free (1 room, 100 MB, AI included) · Teams $399/mo · Pro $999/mo · Enterprise custom. Flat-rate plans. No usage surprises. No per-page fees. AI included, not extra.

Datasite Alternative FAQ

Questions teams ask when comparing.

Sifrsys is a strong Datasite alternative if you want AI document chat and predictable pricing. Datasite is the enterprise M&A incumbent — 55+ years of history and a top-tier deal track record — but as of mid-2026 it does not offer conversational AI on your documents, and it prices per page. Sifrsys is AI-native: participants ask questions in plain language and get answers with clickable citations to the exact page or spreadsheet cell, on flat plans with no per-page fees.

As of mid-2026, Datasite pricing is quote-based and structured per page — roughly $0.60 per page uploaded — with additional charges for Excel and media files, setup fees typically in the $500–$2,500 range, and possible surcharges for extended project duration or users added mid-project. For a 10,000-page deal, per-page fees alone can exceed $6,000. Sifrsys publishes flat plans: a free Starter tier (1 room, 100 MB, AI included), Teams at $399/mo, Pro at $999/mo, and custom Enterprise. No per-page fees, no per-user fees, and AI is never a paid add-on.

Datasite leads in automated AI redaction, AI-powered auto-categorization into a due diligence index, and enterprise scale: 23+ offices, operations in 170+ countries, use by 74 of the top 100 global law firms and all top 20 global financial advisory firms, and a role in a third of the top 100 global deals in 2023. It was the first ISO 27001 certified VDR provider and holds the #1 G2 Grid position in the category (Spring 2025). If you need those things above all else, Datasite is a credible choice — we'd rather tell you that than pretend otherwise.

As of mid-2026, no. Datasite's AI is strong in specific workflows — automated redaction, auto-categorization, multi-language OCR, document classification, and usage analytics — but it does not offer a conversational assistant that answers questions from your data room. Sifrsys provides full retrieval-augmented AI chat with clickable source citations, fenced by each participant's permissions at the database level.

Data rooms are typically set up per deal, so most teams switch by starting their next deal on Sifrsys rather than migrating an active one. Upload your documents (PDF, DOCX, XLSX, PPTX), and they're parsed and AI-indexed automatically. Participants get passwordless magic-link access — no training required. The Starter plan is free with no credit card, so you can evaluate with a real document set before committing.

Try the Difference

Ask your documents a question. Get a cited answer.

Upload a real document set on the free plan and see permission-fenced AI with clickable citations — the feature comparison that matters most takes five minutes to run yourself. And before you upload a single document, the Trust Center states our security posture plainly, including what we do not yet claim.

Start Free Read the Full VDR Comparison

Free to start · No per-page fees · No credit card required

Start Free