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See the love for BoldSign from users about their experience.Digital signing software for contracts, HR forms and agreements, with AES-256 encryption and a tamper-evident audit trail on every signed document.
Trusted by 100,000+ organizations worldwide
BoldSign lets you send documents for signature without the hassle. Just upload your file, enter signer details, and drag and drop fields—such as signature, date, initials, checkboxes, and more—exactly where you need them, and send instantly.
Smart, secure, and scalable: BoldSign is the digital signing software solution built to grow with your business.
Deliver signature requests instantly via SMS, WhatsApp, or email—no hassle, just quick and easy signing.
Upload, send, and sign documents without printing or scanning. Go 100% paperless and boost your efficiency.
Your documents are encrypted, confidential, and legally compliant, so every signature is protected.
The intuitive UI makes it easy to send and sign documents with no special skills or training needed.
Get quick, helpful support via chat, email, or tickets. It’s available to all users of all plans, whether free or paid.
Enjoy premium digital signing software features with flexible, budget-friendly plans that scale as your business grows.
No more back-and-forth emails. Anyone in your company can send documents, share templates, and track signings—all from one centralized platform.
AI-Powered eSignaturesStreamline contract workflows with AI-powered field detection, AI search, and MCP integration. 
Advanced Signer VerificationProtect agreements with ID and biometric checks to prevent fraud and maintain compliance. 
Instant Signing on Mobile AppsReach signers instantly on their favourite apps and collect agreements without delay. 
Bulk Send with CSVSend signature requests to up to 1,000 recipients in a single request. 
Embed Signing LinksEmbed signature URLs in your app or send links via email, SMS, or WhatsApp with no coding required. 
Brand Your Signing RequestsBrand sign requests with your logo, colors, and emails for a professional feel. Pick the one closest to your industry and watch it go from chat to a signed, legally binding, tamper-evident document.
View MCP Demo
BoldSign is backed by Syncfusion, a trusted name in enterprise software for over two decades. With a legacy of powering mission-critical systems for Fortune 500 companies, BoldSign brings the same level of security, stability, and innovation to digital contract signing.
BoldSign is developed by Syncfusion, a global provider of enterprise software used by developers and organizations in 100+ countries for 24+ years.
Leading 400+ enterprises rely on Syncfusion’s technology to power secure, scalable, and mission-critical solutions, including BoldSign.
As an official Microsoft Partner, Syncfusion meets rigorous standards for innovation, reliability, and performance, giving you added confidence in the technology behind BoldSign.
Choose the plan that works best for you and experience the power of enterprise-grade e-signature software today.
View pricing page
Ideal for individuals and micro-businesses
$0
Ideal for small businesses
$5/month/user
Unlimited envelopes
POPULARIdeal for businesses that send many envelopes for signature
$15/month/user
Perfect for businesses with many envelope users
$99/month
Unlimited users
Prices shown are in USD. Final charges may vary based on currency conversion and applicable taxes.
BoldSign is a digital document signing platform that’s developer-friendly. With robust APIs and SDKs, you can seamlessly embed secure e-signature functionality into your own applications, giving you full control.
Postman Developer Choice Award - 2025
Recognized by developers worldwide for ease of integration.
# Replace with the template ID from your BoldSign web application.
curl -X 'POST' \
'https://api.boldsign.com/v1/template/send?templateId={your_template_id}' \
-H 'accept: application/json' \
-H 'X-API-KEY: {your_api_key}' \
-H 'Content-Type: application/json' \
-d '{
"roles": [
{
"roleIndex": 1,
"signerName": "David",
"signerEmail": "david@cubeflakes.com"
}
]
}'using BoldSign.Api;
var apiClient = new ApiClient { ApiKey = "your_api_key" };
var templateClient = new TemplateClient(apiClient);
// Replace with the template ID from your BoldSign web application.
var documentCreated = templateClient.SendUsingTemplate(new()
{
TemplateId = "your_template_id",
Roles =
[
new()
{
RoleIndex = 1,
SignerName = "David",
SignerEmail = "david@cubeflakes.com"
}
]
});ApiClient apiClient = Configuration.getDefaultApiClient();
apiClient.setApiKey("your_api_key");
TemplateApi templateApi = new TemplateApi(apiClient);
Role role = new Role();
role.setRoleIndex(1);
role.setSignerName("David");
role.setSignerEmail("david@cubeflakes.com");
// Replace with the template ID from your BoldSign web application.
String templateId = "your_template_id";
SendForSignFromTemplateForm sendForSign = new SendForSignFromTemplateForm();
sendForSign.setRoles(Arrays.asList(role));
DocumentCreated documentCreated = templateApi.sendUsingTemplate(templateId, sendForSign);<?php require_once "vendor/autoload.php";
$config = new BoldSign\Configuration();
$config->setApiKey('your_api_key');
$template_api = new BoldSign\Api\TemplateApi($config);
$roles = new BoldSign\Model\Role();
$roles->setRoleIndex(1);
$roles->setSignerName("David");
$roles->setSignerEmail("david@cubeflakes.com");
// Replace with the template ID from your BoldSign web application.
$template_id = "your_template_id";
$send_for_sign = new BoldSign\Model\SendForSignFromTemplateForm();
$send_for_sign->setRoles([$roles]);
$document_created = $template_api->sendUsingTemplate($template_id, $send_for_sign);import boldsign
configuration = boldsign.Configuration(api_key="your_api_key")
with boldsign.ApiClient(configuration) as api_client:
template_api = boldsign.TemplateApi(api_client)
role = boldsign.Role(
roleIndex=1,
signerName="David",
signerEmail="david@cubeflakes.com"
)
# Replace with the template ID from your BoldSign web application.
template_id = "your_template_id"
send_for_sign = boldsign.SendForSignFromTemplateForm(
roles=[role]
)
document_created = template_api.send_using_template(template_id, send_for_sign)import { TemplateApi } from 'boldsign';
import { Role, SendForSignFromTemplateForm } from 'boldsign';
const templateApi = new TemplateApi();
templateApi.setApiKey('your_api_key');
const role = new Role();
role.roleIndex = 1;
role.signerName = "David";
role.signerEmail = "david@cubeflakes.com";
// Replace with the template ID from your BoldSign web application.
const templateId = "your_template_id";
const sendForSign = new SendForSignFromTemplateForm();
sendForSign.roles = [role];
const documentCreated = templateApi.sendUsingTemplate(templateId, sendForSign);BoldSign meets top global standards like SOC 2, GDPR, HIPAA, and PCI DSS. Every signature is legally enforceable under the ESIGN Act, UETA, eIDAS, and global laws. With AES-256 encryption, your data stays protected from start to finish.
View security policySee how teams in payments, healthcare, HR, hospitality, and nonprofits run their signing on BoldSign.
All customer stories
Payments
Budget-Friendly API: BoldSign's Transparent Pricing and Easy Integration Solutions
“There’s nothing hidden with BoldSign, and I think that’s one of the most refreshing things.”
Jason Meuter · Developer, Payroc
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April 24, 2025
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Yes, electronic signatures made with BoldSign are legally valid and comply with global eSignature laws.
You can sign a wide range of documents using our digital signing software, including contracts, HR forms, financial agreements, real estate documents, and more.
BoldSign supports PDF, DOCX, JPG, and PNG formats. PDF is the preferred format.
Yes, signing documents is free for recipients.
Yes, BoldSign allows you to define a signing order by arranging signers in sequence.
No, BoldSign is designed to be intuitive and user-friendly. Our digital signing software requires no technical expertise or training.
BoldSign offers a clean interface, responsive customer support without extra fees, and flexible pricing plans, including a free tier.
Yes, BoldSign has a mobile app that lets you manage and sign documents on the go, making our digital signing software accessible anytime, anywhere.
Digital signatures provide three critical features: authentication, data integrity, and non-repudiation. Theseensure the signer's identity is verified, the document remains unchanged, and the signer cannot deny theirsignature.
BoldSign is the top choice for digital signing, offering a secure and user-friendly platform with features such as instant signature requests, enterprise-grade security, and customizable branding.
