The BoldSign mobile app is now available. Visitthis link for more details and give it a try!

The BoldSign mobile app is now available. Visitthis link for more details and give it a try!

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Explore the BoldSign features that make eSigning easier.

Integrate Embedded Signatures into Your Applications

Embedding the entire signature process into your app has become incredibly simple with our API. We have over 20 years of experience creating various APIs consumed by millions of developers.

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Embedded signatures

Integrating the signing process into your app and website, provides a seamless experience for your customers or signers. They can view and sign agreements easily without the need to switch between different applications using iFrame.

Brand customization

With BoldSign, you can easily customize the appearance of the document signer page to match your product seamlessly. You can apply custom branding elements such as logo, primary button, and text colors, and even enable your own disclaimer.


Multiple brands

You can create multiple brands within your account in BoldSign. You can choose the brand to apply, when sending a signature request, ensuring a consistent and tailored experience. This is particularly useful in SaaS multi-tenant scenarios.

Suppress email workflows

BoldSign offers the flexibility to suppress or disable email workflows and instead embed the signing process directly within your app. Alternatively, you can create your own email workflows using webhooks and API, allowing for complete customization based on specific needs.


Client-side events and Redirect URL

By utilizing client-side events from the embedded sign page, you can take specific actions on your website or application based on the signer’s interactions during the signature process.  You can also enhance the user experience by smoothly redirecting the signer to a dedicated page after document completion.


With BoldSign’s webhook integration, you receive instant updates and notifications in real-time when documents are signed or completed. Customize the webhook configurations to align with your specific workflow requirements, effortlessly synchronizing data between BoldSign and your systems.


Security and Privacy


Legally compliant with U.S. and international laws

BoldSign is legally compliant with U.S. (ESIGN) and international (eIDAS) eSignature laws. We record all major activities that happen during the signing process and provide a downloadable copy of the complete audit trail report. The final document is also digitally signed so that any tampering in the future can be immediately detected.


Your data is protected using bank-grade security standards

We take data security very seriously and have built it into every aspect of the application right from the beginning. All the data stored and transmitted is encrypted using 256-bit AES encryption standards. Your data is completely secure to the point where our own staff do not have access to it even for troubleshooting purposes. Learn more


Certified with SOC 2®, GDPR, HIPAA, and PCI DSS compliant

As a company committed to providing secure and trustworthy services to our clients, we are proud to announce that Syncfusion’s BoldSign is certified with SOC 2®, GDPR, HIPAA, and PCI DSS compliant. This means that we have implemented strict security measures and data protection protocols to ensure the privacy, confidentiality, and integrity of our clients' data.

why boldsign?
Enterprise-grade product with all the bells and whistles at an affordable price

Quick setup

The majority of our clients typically complete the integration of our API within one week or less.


Excellent customer support

We strive to provide the best possible customer support and are always ready to assist in any way we can, even if you are on a free plan.


20 years in business

Syncfusion, the company behind BoldSign has been building enterprise-grade software for over 20 years. We are committed to making market-leading electronic signature software.


High availability

Our APIs are designed to ensure maximum uptime and have consistently delivered uninterrupted service so far.

Frequently asked questions

Embedded signatures enable you to embed the signature request sending and signing interfaces on your own application. This allows your users to send or sign documents seamlessly within your application, enhancing their overall experience.

No, signers don’t need a BoldSign account or pay any fees to sign documents in the embedded signing process.

Sender identities are necessary to send signature requests on behalf of another user. Simply add the intended user as the sender identity, but you will need to get their approval before proceeding. Please visit our API documentation for more details.

At BoldSign, security is our top priority. We ensure the utmost user data and documents protection through end-to-end encryption and adherence to industry regulations like GDPR and SOC 2®.

BoldSign charges for its eSignature API on a per-document basis. It costs $0.75 per document. Please visit our pricing page for more information.