The advantages of e-signatures, without the risks. Only Subnoto keeps documents confidential even during signing.
Your documents stay confidential
No one can access your data: not Subnoto, not third parties, and not even governments. You stay in control of your data.
Integrate and collect signatures effortlessly
Wether you're using our web app, SDKs, MCP server or API, integrate Subnoto into your workflow in hours, not weeks.
Technology people actually want to use
No passwords to forget (passkeys). No data exposed during processing (confidential computing). No clunky interfaces (modern UX).
Our intuitive interface, secure collaboration features, and API are all designed to help you complete agreements faster.
Send and sign documents quickly. Browse and search confidential workspaces that only designated team members can access.
100% passwordless for safer, speedy access, and less time wasted on account resets.
Real-time status tracking and automatic notifications make staying ahead of deadlines a breeze.
Electronic signatures tailor-made for most agreements and contracts. Legally valid in Europe. eIDAS advanced and qualified electronic signatures planned for 2025.
Read more about signature legality
Security is the DNA of Subnoto. We deliver top-grade security with confidential computing and advanced cryptographic methods so you can focus on completing agreements faster.
Use of trusted execution environments (TEEs) means privacy from unauthorized parties, even during processing, and even from Subnoto.
Enclaved audit trails of document activity ensure continuous, immutable access records for seamless compliance.
Subnoto provides verifiable privacy guarantees through secure hardware enclaves and cryptographically-verifiable attestations. Subnoto, its third parties and even governments cannot access your data.
Your data is securely stored in encrypted form and processed within secure enclaves on our own servers, ensuring maximum privacy and compliance with European standards.
Integrating Subnoto into your workflow is simple and efficient. Our feature-rich platform offers multiple integration options: REST APIs, type-safe SDKs, real-time webhooks, and AI-powered MCP servers. Build powerful automation without complexity.
Integrate seamlessly with our comprehensive REST API. We provide a full OpenAPI specification with type-safe endpoints, built-in encryption, and HTTP signature authentication. Get an e-signature feature in minutes, not hours.
Official TypeScript and Python SDKs with full type safety and built-in encryption. Handle authentication, encryption, and API operations effortlessly.
Enable AI assistants like Claude and Cursor to interact with Subnoto through our Model Context Protocol server. Automate signature workflows with AI-powered tools and seamless IDE integration.
Receive real-time notifications when envelopes are signed or completed. Automatically update your systems, trigger workflows, and keep everything synchronized. Simple setup, powerful automation with real-time webhooks.
Step-by-step tutorials and comprehensive guides make it easy to integrate e-signatures into any product. From creating your first envelope to advanced workflows, get up and running quickly.
Hundreds of professionals and companies rely on Subnoto for secure, confidential e-signatures.
"As a startup, we need tools that get to the point without sacrificing security. Subnoto won us over with its ease of use and accessible model. The tool is intuitive and the team is extremely responsive."
Translated from French
"Subnoto makes electronic signature the new partner for the firm's administrative work while respecting professional rules. Confidentiality combined with technology reinvents day-to-day operations."
Translated from French"I've been using this e-signature platform for about six months to get my quotes and contracts signed. The tool is very well designed, ergonomic and pleasant to use. Navigation is smooth, signing is easy and document tracking is clear: you can see whether the client has opened or signed it. An efficient solution that saves time for me and the client. I recommend it!"
Translated from FrenchWe answer most frequently asked questions.
Confidential computing is all about keeping your sensitive data safe, no matter where or when it's being used. Data can exist in three states: at rest, in transit, and in use. While most security measures focus on protecting data when it's stored or sent, confidential computing takes it a step further by securing your information even when it's actively being processed. Thanks to secure enclaves-think of them as ultra-secure vaults-Subnoto makes sure your data remains private, protected, and only accessible to you, no matter what.
Many e-signature and contract management tools look simple on the surface but often fall short when it comes to security or speed. They store sensitive data on external servers, introducing potential risks, or rely on outdated workflows that slow you down.
Subnoto changes the game by applying confidential computing to secure every step of the contract lifecycle and designing modern signature workflows built for speed.
Passwords are not only a pain to remember but also insecure: they can be phished or stolen from servers. Subnoto is the first e-signature solution to fully embrace passwordless login methods. Passkeys and magic links provide a password-free experience that's not only phishing-resistant but also more convenient.
We believe compliance doesn't have to be complicated. Subnoto makes it easy to stay compliant with audit logs, secure user permissions, and real-time status tracking. Thanks to confidential computing, sensitive information is only accessible to the right people, and only when it should be. No more digging through endless folders or wondering if you've met regulatory requirements. With Subnoto, you get a clear, transparent process that makes internal audits and external reporting feel effortless.
At Subnoto, we’re not just offering another e-signature tool. We’re rethinking the entire contract experience to make it smarter, safer, and faster.
Security without compromise: With confidential computing powering our platform, your data is secure at every stage, even while it’s being processed. Your access to Subnoto is also secure and phishing-resistant thanks to passwordless login methods like passkeys.
Faster, frictionless workflows: Our streamlined approach removes unnecessary steps so your contracts move at the speed of your business.
Full transparency: Stay in control with real-time updates, automatic compliance checks, and easy-to-read audit trails.
Subnoto isn’t just about signing faster. It’s about working smarter, building trust, and staying ahead. Take your contract management to the next level.
We’re here to support you, whether you’re just getting started or need expert advice.
Send us a message at [email protected] and we’ll get back to you quickly.
Privacy-friendly e-signatures made in France 🇫🇷
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