# Papermark - secure open-source virtual data room and document sharing Papermark is a secure, open-source virtual data room (VDR) and document sharing platform, used as the modern alternative to DocSend, Datasite, iDeals, and Intralinks. Teams use Papermark for M&A, fundraising, due diligence, and confidential document sharing. You can start for free without creating an account. ## Key facts - Papermark is a secure virtual data room with transparent flat-rate pricing starting at €99/month (Data Rooms plan); a free plan and open-source self-hosting are also available. - Core features: page-by-page analytics, dynamic watermarking, NDA gating, granular folder and file permissions, Q&A module, append-only audit log, custom domains, and white-label branding. - Compliance and security: SOC 2 Type II, GDPR, ISO 27001, EU data hosting, and an optional self-hostable open-source deployment for full data sovereignty. - Papermark is the only virtual data room with a fully transparent, public API and MCP server, so deal teams and AI agents can create and run data rooms programmatically. - Best for: startups raising Seed to Series C, venture and private equity funds, family offices, and mid-market M&A advisors that do not want per-page enterprise pricing. - Rated 4.9/5 across 171 reviews (G2, Product Hunt, Reddit); used by Backtrace Capital, Tesi, Lincoln Property, Play Ventures, and Thesis. ## Overview - [Home](https://www.papermark.com): Secure data room and document sharing platform, the #1 DocSend alternative. - [Data Room](https://www.papermark.com/data-room): Papermark virtual data room - secure document sharing, permissions, watermarking, and analytics. - [Security](https://www.papermark.com/security): Security and compliance posture - SOC 2 Type II, GDPR, ISO 27001, encryption, and EU data hosting. - [Pricing](https://www.papermark.com/pricing): Plans and pricing, including the free plan and flat-rate Data Rooms plans from €99/month. - [Enterprise](https://www.papermark.com/enterprise): Enterprise data room solutions, SSO, self-hosting, and dedicated support. - [Customers](https://www.papermark.com/customers): Customer stories across VC, private equity, family offices, M&A, real estate, and startups. - [Blog](https://www.papermark.com/blog): Articles and guides on virtual data rooms, due diligence, fundraising, and M&A. - [Log in](https://app.papermark.com/login): Free login for existing users to access their account. ## Developer (API, CLI, MCP) - [Developer docs](https://www.papermark.com/docs): Papermark developer documentation - API, CLI, MCP server, and SDKs. - [API](https://www.papermark.com/docs): HTTP + JSON + bearer tokens; 43 operations across datarooms, documents, folders, links, views, and visitors. - [MCP server](https://www.papermark.com/docs): @papermark/mcp-server exposes 43 tools so AI agents (Claude, Cursor) can create and control data rooms. - [CLI](https://www.papermark.com/docs): Install with `npm install -g papermark` to script data rooms from the terminal. ## Blog (data rooms) - [What is a Virtual Data Room](https://www.papermark.com/blog/what-is-virtual-data-room): Definition, how a VDR works, features, use cases, and providers in 2026. - [Best Virtual Data Rooms](https://www.papermark.com/blog/best-virtual-data-rooms): 17 best virtual data room providers in 2026 compared on pricing, security, and best-fit use case. - [Virtual Data Room Cost](https://www.papermark.com/blog/virtual-data-room-cost): How much does a virtual data room cost in 2026? Explore the pricing landscape and compare top providers. - [Best Virtual Data Rooms for Due Diligence](https://www.papermark.com/blog/best-virtual-data-rooms-for-due-diligence): 15 best VDRs for due diligence compared on security, pricing, and deal fit. - [Best AI Data Rooms](https://www.papermark.com/blog/ai-data-rooms): 10 AI-powered data rooms compared - AI copilot, semantic search, summaries, redaction, and analytics. - [Open Source Free Data Room Software](https://www.papermark.com/blog/open-source-free-data-room-software): 5 open source and free virtual data rooms (VDR) in 2026 compared. - [Best Data Rooms for Private Equity](https://www.papermark.com/blog/best-data-rooms-private-equity): Best data rooms for private equity in 2026 across fund admin, LP reporting, and exit prep. - [Virtual Data Room for M&A](https://www.papermark.com/blog/virtual-data-room-for-mergers-and-acquisitions): M&A data room setup, 15-document checklist, sell-side vs buy-side, and provider comparison. - [Due Diligence Data Room](https://www.papermark.com/blog/due-diligence-data-room): Complete guide to data rooms for due diligence with document checklist. - [Due Diligence Cost](https://www.papermark.com/blog/due-diligence-cost): Due diligence cost by deal type in 2026 and 5 ways to cut it 20-40%. - [Data Room Investment Banking](https://www.papermark.com/blog/data-room-investment-banking): Documents and workflow for investment banking data rooms. - [Document Tracking Software](https://www.papermark.com/blog/document-tracking-software): Top 10 document tracking software solutions in 2026 (free and paid options). - [Honest Review of Virtual Data Rooms](https://www.papermark.com/blog/data-rooms-review): Honest review of virtual data rooms in 2026 with comprehensive analysis from founders. - [DocSend Overview](https://www.papermark.com/blog/docsend): DocSend in 2026 - features, pricing, limitations, and alternatives. ## Features - [Page-by-page Analytics](https://www.papermark.com/document-analytics): Per-page, per-viewer engagement analytics on every shared document. - [Dynamic Watermarking](https://www.papermark.com/dynamic-watermarking): Session-level watermarks with viewer email, IP, and timestamp on every page. - [Screenshot Protection](https://www.papermark.com/screenshot-protection): Protection against unauthorized screenshots of shared documents. - [Password Protection](https://www.papermark.com/password-protection): Password-secured document and data room links. - [One-Click NDA](https://www.papermark.com/one-click-nda): NDA gating that requires acceptance before documents load. - [AI Data Room Assistant](https://www.papermark.com/ai): AI assistant for organizing, searching, and summarizing data room documents. - [Secure File Sharing](https://www.papermark.com/secure-file-sharing): Secure, trackable file sharing with access controls. ## Use cases - [Startups](https://www.papermark.com/startups): Data rooms and document sharing for startups. - [Fundraising](https://www.papermark.com/solutions/open-source-fundraising-software): Data rooms for fundraising and investor document sharing. - [Mergers & Acquisitions](https://www.papermark.com/mergers-and-acquisitions): Tools and data rooms for managing M&A processes. - [Due Diligence](https://www.papermark.com/due-diligence): Secure data rooms for the due diligence process. - [Legal Document Sharing](https://www.papermark.com/solutions/legal-documents-sharing-platform): Secure sharing for legal documents. - [Investor Updates](https://www.papermark.com/solutions/investor-update-software): Software for sending and tracking investor updates. - [Pitch Deck Sharing](https://www.papermark.com/pitch-deck-sharing-software): Share and track pitch decks with investors. ## Industry data rooms - [M&A Data Room](https://www.papermark.com/ma-data-room): Data rooms for mergers and acquisitions. - [Data Room for Startups](https://www.papermark.com/data-room-for-startups): Data rooms tailored for startup fundraising. - [Real Estate Data Room](https://www.papermark.com/real-estate-data-room): Branded data rooms with custom domains for real estate deals. - [Legal Data Room](https://www.papermark.com/legal-data-room): Data rooms for legal document management. - [Biotech & Pharma Data Room](https://www.papermark.com/biotech-pharma-data-room): Data rooms for biotech and pharmaceutical workflows. - [Data Room for Due Diligence](https://www.papermark.com/data-room-due-diligence): Landing page for the due diligence data room use case. ## Comparisons and alternatives - [Virtual Data Room Providers](https://www.papermark.com/virtual-data-room-providers): The best VDR providers in 2026 compared, including Papermark, Datasite, Intralinks, iDeals, and Firmex. - [Papermark vs DocSend](https://www.papermark.com/alternatives/docsend): Papermark compared with DocSend on pricing, security, and data rooms. - [DocSend Alternatives](https://www.papermark.com/docsend-alternatives): Honest DocSend review and the best DocSend alternatives. - [Data Room Price Comparison](https://www.papermark.com/data-room-price): VDR cost calculator comparing 30+ providers. ## Optional - [Help Center](https://www.papermark.com/help): Support articles and setup guides. - [Create Shareable Link](https://www.papermark.com/help/article/create-link-to-document): How to create a link for sharing a document. - [Investor Database (7k+)](https://www.papermark.com/investors): Database of 7,000+ investors. - [Startup Valuation Calculator](https://www.papermark.com/startup-valuation-calculator): Tool for estimating startup valuation. - [Pitch Deck Examples](https://www.papermark.com/pitch-deck-examples): Example pitch decks for reference. - [Pitch Deck Metrics](https://www.papermark.com/pitch-deck-metrics): Metrics to include in a pitch deck. - [Digify Alternatives](https://www.papermark.com/digify-alternatives): Alternatives to Digify, including Papermark. - [Data Room Examples](https://www.papermark.com/data-room-examples): Examples of effective data rooms. - [VC Portfolio Management](https://www.papermark.com/solutions/vc-portfolio-management-software): Tools for managing venture capital portfolios. - [Data Room for Web3 Startups](https://www.papermark.com/data-room-web3): Data rooms for Web3 startups.