Find the Best E-Signature API
for Your Business in 2025
Compare leading e-signature APIs side-by-side, including pricing, features, and technical capabilities, so you can choose the best fit for your application’s workflows.
| BoldSign | Docusign | Dropbox Sign (formerly HelloSign) | Adobe Acrobat Sign | PandaDoc |
|---|---|---|---|---|
$0.75 | $4.8 | $2.5 | Not disclosed | Not disclosed |
| BoldSign | $0.75 Start free trial |
|---|---|
| DocuSign | $4.8 |
| Dropbox Sign | $2.5 |
| Adobe Sign | Not disclosed |
| PandaDoc | Not disclosed |
G2 ratings for e-signature APIs
Comparisons
BoldSign
Docusign
Dropbox Sign (formerly HelloSign)
Adobe
Acrobat Sign
PandaDoc
Overall Rating
4.7/5
4.5/5
4.7/5
4.4/5
4.7/5
Ease of Use
Meets Requirements
Quality of Support
Has the Product Been a Good Partner in Doing Business?
Ease of Admin
Ease of Setup
Product Direction (% Positive)
Feature comparison of leading e-signature APIs
Explore our e-signature API comparison to see how top platforms compare on features—so you can quickly understand the strengths of each platform.
BoldSign
Docusign
Dropbox Sign (formerly HelloSign)
Adobe
Acrobat Sign
PandaDoc
Embedded Send
Embedded Sign
Embedded Template Creation
Send Document on Behalf (Without Account)
Custom Branding
Official SDKs
Embedded Mobile Responsive
Text Tags
Automatic PDF Field Detection
Embedded Custom Field
Webhooks
Free Support
Email Content Customization
Identity Verification
Multi-Branding
Reminders
Expiry Settings
Custom Email Domain
How to pick the right e-signature API
Use these tips to evaluate performance, security, workflow capabilities, and pricing so you can choose an API that fits your technical and business requirements.
Tip #1
Dedicated Developer Support
Choose an API that offers responsive, developer-focused support. With fast live chat assistance—where most issues are resolved immediately—you can keep integrations moving smoothly, even on entry-level plans.
Tip #2
No Complex Go-Live Process
Go live quickly without lengthy reviews or approval steps. A streamlined deployment process ensures fast integration and minimal friction.
Tip #3
Helpful SDKs
Ensure SDKs are available across major tech stacks, enabling developers to integrate e-signature features quickly with minimal code.
Tip #4
Unlimited Sender Identities
Support for acting on behalf of multiple users with their consent helps control access and manage workflows without limits.
Tip #5
Multitenant SaaS App Integration
True multitenancy allows each tenant to send documents under their own identity without extra accounts or added costs.
Tip #6
Coding Assistance
Hands-on coding help in languages like Python, .NET, or Node.js speeds up integration and reduces development overhead.
Tip #7
No Overage Charges
Predictable billing without unexpected overage fees ensures clean scaling and easier cost management.
Tip #8
Pay-As-You-Go Flexibility
Pay only for what you use—ideal for small teams and growing businesses.
Tip #9
Reliable Performance
Low latency, strong uptime, and scalable throughput keep signing workflows fast and dependable.
Tip #10
Real-Time Webhooks
Quick updates when documents are sent, opened, signed, or finished keep systems up to date without manual checks.
Tip #11
Custom Branding
Ability to configure logos, color schemes, and personalized messages ensures a professional signing experience that reflects your brand identity.
Tip #12
Developer Tools
Postman collections, API explorers, sample code, and responsive support help developers build and troubleshoot faster.
Tip #13
Signer Authentication
Authentication options like government ID proof, biometric facial recognition, OTPs, and access codes keep signers secure.
Tip #14
Clear Documentation
Simple, easy-to-read guides with examples, sample calls, and error notes help teams learn quickly and avoid setup issues.
Tip #15
Free Sandbox
A free sandbox lets you try every feature without risk. Your team can test calls, check workflows, and make sure everything works before you go live.
Tip #16
Legal Compliance
Meet global security and privacy standards such as SOC 2, GDPR, HIPAA, and PCI DSS. Ensure documents are legally enforceable under ESIGN, eIDAS, and other regulations.
Tip #17
Flexible Workflows
Offer support for templates, signer steps, reminders, and embedded signing to create customized signing flows that fit any business process.
Tip #18
Large Batch Handling
Capability to handle high document volumes without slowing down ensures reliable performance for heavy workloads.
Why developers choose BoldSign
Affordable pricing
Transparent costs at just $0.75 per envelope.
Developer-friendly tools
REST API, SDKs, webhooks, and embedded signing flows.
Fast integration
Clear documentation, free sandbox, and responsive support.
Reviews
Don't take our word for it.
Check out our reviews on G2 to see what customers have to say about BoldSign.
Great and Simple product
I was looking for a simple and easy to use system that was not going to break the bank. Bold Sign delivers in all aspects. Easy to use and outstanding cost structure.
Abraham M.
Posted on April 28, 2025
Great experience with BoldSign
BoldSign streamlines our document signing process. Its intuitive design and reliable customer service make it a pleasure to use. The software is very user friendly.
Kevin R.
Posted on March 11, 2025
Very satisfied with BoldSign
BoldSign is easy to use and has been a seamless integration into our workflow. Very user friendly and easy to navigate. Customer service is helpful and responsive.
Cassie S.
Posted on March 25, 2025
Customer Stories
Hear from Our Customers
Explore real success stories from organizations that use BoldSign to streamline document workflows, strengthen compliance, and accelerate business operations.
Payroc
Learn how Payroc successfully incorporated the BoldSign API into their contract management workflow.
Premier Tax and Accounting Group
Learn how Premier Tax and Accounting Group successfully deployed BoldSign to capture client signatures.
The JamSpot LLC
Learn how BoldSign helped JamSpot simplify their rental agreements for smoother operations.
Potenta Law
How Potenta Law simplified document signing for clients with limited tech experience-without compromising on affordability or legal compliance.
Kansas Daycare
See how Chelsey Harvey replaced Docusign with BoldSign to save costs and simplify parent agreements at her growing Kansas childcare center.
Anthony Zurica
Discover how Anthony Zurica simplifies real estate law with BoldSign’s fast, paperless e-signature solution.
Angel Griffin
Read Angel Griffin's success story: Discover how BoldSign's prompt, real-time customer service resolved key issues, surpassing Docusign's AI Assistance.
Commersion Legal
See how BoldSign helped Jason Xu to modernize Commersion Legal’s contract signing process by reducing costs and grow his legal business in Australia. Check now!
Gray Matter Realty
Discover how Nate Phillips switched from Docusign to BoldSign, reducing costs and streamlining real estate workflows using a smarter eSignature solution.
Elizabeth Moncrief
Read Elizabeth Moncrief’s success story on BoldSign—how it helped RHA digitize housing recertification, enable fast signing, and enhance client experience.
Ayush Kumar
How Business Integra cut document delays with BoldSign. Ayush Kumar used automated reminders and unlimited envelopes to speed signatures and reduce follow‑ups.
Taylor Pyles
Read Taylor Pyles success story to discover how BoldSign helped automate volunteer onboarding, simplify signing, and securely manage nonprofit documents.
Zach Calvert
Discover why BoldSign is perfect for businesses that need quick, secure, and simple e-signature workflows with great support and future-ready features.
Nikki Adams
Discover how BoldSign made ABA TREE’s workflow hassle-free with affordable, branded e-signatures for intake and onboarding.
Fatema Ebrahim
Discover how BoldSign made handling client contracts and employee on-boarding easier, quicker and far more organized.
Jean Werthman
See how BoldSign helped VSC Commercial Properties sign leases online & replace DocHub with an intuitive e-sign solution.
Shaun Mook
Discover how BoldSign transformed Redcat’s workflow with quick branded template setup, faster document branding, and a user-friendly e-signature experience.
Randy Via
Discover how BoldSign helps him send home inspection contracts faster, cut delays, and deliver signed agreements within 24 hours.
Debra Lyles
See how WDC Solar transformed their contract process with BoldSign, making signing simpler, faster, and reliable for every customer.
Terri Rausch
Terri Rausch’s success story shows how BoldSign helps a nonprofit animal rescue save time, cut paperwork costs, and speed up adoption agreements.
Syncfusion
Learn how Syncfusion successfully integrated BoldSign into their HR processes.
Frequently asked questions
Yes. BoldSign provides a free sandbox so you can test workflows before going live.
Yes. BoldSign provides SDKs for .NET, JavaScript, Java, Python, and PHP to simplify integration.
Yes. BoldSign supports embedded signing for web and mobile app experiences.
Yes. You can use text tags to place fields without manual coordinates.
Yes. BoldSign’s API supports automatic PDF field detection, making it easier to identify and map fields without manual input.
Yes. You can add custom fields and metadata for tracking and reporting.
Yes. The API supports sequential and parallel routing, and can support more advanced flows based on your setup.
Yes. You can set automated reminders and expiration per e-signature request.
Yes. BoldSign supports multitenant setups with isolated configurations and branding for each tenant.
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