pdfFiller vs. OneSpan Sign: Comparing security features for small enterprises

• Choose pdfFiller if you need one cloud-based platform to edit PDFs, create forms, manage document sharing, and sign documents with built-in eSignature integration.
• Choose OneSpan Sign if your priority is enterprise-level security controls and advanced signer authentication options.
• For teams deciding between leading digital signature software options, pdfFiller typically wins on all-in-one document management plus editing, while OneSpan Sign typically wins on security-first eSignature workflows with deep enterprise controls.

Introduction to digital signature software

Digital signature software has transformed the way organizations and individuals sign documents, offering a faster, more secure, and eco-friendly alternative to traditional paper-based processes. As remote work and digital collaboration become the norm, businesses of all sizes are seeking reliable ways to sign documents electronically and manage legally binding signatures without the hassle of printing, scanning, or mailing.

What is OneSpan Sign?

OneSpan Sign stands out as a leading digital signature software, trusted by organizations worldwide to streamline the signing process and ensure the integrity of every document. With robust features designed to help users create, send, and sign documents securely, OneSpan Sign enables businesses to maintain compliance and build trust with clients and partners. The platform’s focus on security, auditability, and ease of use makes it a top choice for those who need to manage signatures and documents efficiently.

An overview of OneSpan eSignature features, including smart forms, signer permissions, and workflow automation.

Why does enterprise-grade security matter regardless of enterprise complexity?

Small enterprises (roughly 50–100 employees) often have the same security and compliance obligations as larger organizations, but fewer specialists to manage them. That creates a practical requirement: robust security that doesn’t slow down the signing process or block teams from completing business-critical documents. It is essential to select a platform that adheres to industry-standard regulations and frameworks, particularly for organizations operating in regulated sectors.

Two patterns show up in small enterprise document security programs:

• You need clear controls (access, audit trails, retention) and repeatable workflows for legally binding documents.
• You need a user-friendly interface so most users can upload documents, add signature fields, and sign documents without escalating every task to IT.

Though pdfFiller vs. OneSpan Sign is not a common comparison for teams that want leading digital signature software, but since the solutions may be compared, we’ll walk you through the features and security measures of each platform.

Small enterprise security requirements

Most small organizations want four outcomes from digital signature software and broader document management:

• Confidentiality: encryption in transit and at rest
• Integrity: tamper evidence for digital signatures
• Accountability: detailed audit trails
• Compliance readiness: clear controls aligned with frameworks (for example, SOC 2 and HIPAA for healthcare workflows). When evaluating an eSignature solution, it is crucial to ensure it meets relevant security certifications and compliance requirements specific to your industry.

SOC 2 is often used as an assurance mechanism for cloud services, since it evaluates controls related to security, availability, confidentiality, processing integrity, and privacy.

What security capabilities should you compare first?

If your priority is small enterprise PDF security, the fastest way to compare pdfFiller and OneSpan Sign is to look at:

• Encryption and transport security
• Authentication and identity checks
• Access controls and admin governance
• Audit trails and tamper protection
• Compliance alignment and trust documentation

Both platforms are designed to save time by streamlining document signing and management processes, reducing manual tasks, and increasing efficiency.

How do pdfFiller and OneSpan Sign compare on core security features?

Encryption

Both pdfFiller and Onespan Sign describe enterprise-grade encryption practices for protecting documents and digital signatures. You can find more information on how to encrypt a PDF with pdfFiller in one of our blog articles.

• OneSpan Sign states it uses AES 256-bit encryption and emphasizes secure cloud infrastructure for its eSignature solution.
• pdfFiller describes encrypted data communications and secure storage, along with security features such as two-factor authentication and certificate-based signing.

Security takeaway for small enterprises: When comparing leading digital signature software, encryption is usually a table-stakes requirement. The differentiators show up more in admin controls, authentication depth, and how well security fits daily document management.

An overview of OneSpan Sign eSignature features, including smart forms, signer permissions, and workflow automation.

Authentication

Authentication affects whether electronic signatures are defensible, especially in regulated environments or disputes.

• OneSpan Sign emphasizes advanced authentication options and security-first workflow design.
• pdfFiller supports account-level security controls (including two-factor authentication) and certificate-backed signature evidence.

If you need strict identity verification as part of the signing process (for example, high-risk finance workflows), OneSpan Sign may align better. If you need a secure eSign option with faster onboarding for most users, pdfFiller tends to be easier to operationalize.

Access controls

Access controls matter when multiple users need to work on the same documents without exposing sensitive data.

• OneSpan Sign highlights centralized administration, groups and permissions, and enterprise administration capabilities.
• pdfFiller highlights account activity control, audit logs, and user-level security features for working with documents.

In practice: OneSpan Sign often fits teams that want strict permission hierarchies for signature software. pdfFiller often fits teams that want security plus usability across document editing and eSigning.

Audit trails

Audit trails are critical for legally binding signatures because they create an evidentiary record.

• OneSpan Sign documentation describes audit trails containing certificates, timestamps, signer identification data, and tamper-sealing via digital signature.
• pdfFiller describes document audit logs and certificate technology as part of its security overview.

These capabilities align with the purpose of digital signatures: detect unauthorized modification and provide strong integrity evidence.

Compliance certifications and frameworks

Compliance is rarely one checkbox. Many teams need a platform that has multiple certifications (SOC 2, HIPAA, GDPR, and more), depending on industry and customer contracts.

• OneSpan Sign states compliance with ISO/IEC 27001 family controls, SOC 2 Type II, HIPAA, and FedRAMP (among others).
• pdfFiller publicly describes a security program and compliance positioning, and references SOC 2 Type II and HIPAA-aligned use cases.

If you operate in the EU, eIDAS definitions matter when evaluating digital signatures and eSignatures for regulated signing.

What does the security feature comparison look like in one table?

How easy is implementation for small enterprises?

Small enterprises usually need secure eSigning and document management tools they can deploy quickly, without heavy IT projects or long training cycles. In this section, we compare how pdfFiller and Onespan Sign handle setup, onboarding, and day-one usability, so you can estimate the real deployment effort, not just the feature depth.

How quickly can pdfFiller be deployed with minimal IT involvement?

pdfFiller offers a practical outcome: teams often standardize templates, set up shared folders, and begin sending signature requests quickly, without requiring a long configuration cycle.

pdfFiller’s complete feature overview shows your ability to edit, convert, compress, and eSign PDF documents.

Why does OneSpan Sign often involve more structured deployment work?

OneSpan Sign suits security-focused eSigning and digital signatures, with enterprise controls and configuration options intended for complex workflows.

For a small enterprise, that’s not necessarily a drawback. It’s a trade-off: more control usually means more setup decisions.

How do user management and admin controls compare?

When you evaluate signature software for growing teams, user management is where “secure” becomes “operational.”

Here’s what to pressure-test for both pdfFiller and OneSpan Sign:

Admin controls

Ask these questions:

• Can admins enforce security settings at the account level?
• Can admins see document access history and manage file sharing rules?
• Does the platform support centralized user governance for eSigning and digital signature software?

OneSpan Sign emphasizes enterprise administration, security settings, and permission structures.
pdfFiller emphasizes account activity control and document-level audit logs that help teams monitor document handling.

Team structures and permission hierarchies

If you have multiple departments, you typically want:

• Department-level access segregation
• Template ownership rules
• Controls for who can send documents and who can sign documents on behalf of the business

OneSpan Sign highlights groups and permissions as core administration capabilities.
pdfFiller focuses on secure collaboration, document audit logging, and security features that support shared document management.

Onboarding and offboarding

Small enterprises need simple onboarding because people join and change roles frequently. In practice:

• pdfFiller tends to reduce friction because most users can start with a user-friendly interface and learn by going through document editing and eSigning.
• OneSpan Sign can require more structured onboarding if you are enabling advanced authentication or a tightly controlled signing process.

This is where the success of the three-word combination: “enterprise security eSignature” – often depends more on process than features.

Where do data residency and privacy policies matter most?

Data residency and retention are essential for regulated teams and vendor risk assessments.

Where is data stored?

OneSpan Sign states it is built on infrastructure services from major providers and positions cloud security as a key part of its offer.
pdfFiller describes secure storage facilities and encrypted communications as part of its security overview.

If your contracts require region-specific storage, confirm it directly during procurement. This is an area where leading digital signature software varies by plan and region.

Why does pdfFiller often feel more usable for everyday work?

pdfFiller is a broad document management platform. That matters if your team needs to create documents, customize documents, and complete document editing tasks before you sign.

Steps of the typical use of pdfFiller by teams are:

1. Upload documents from email, shared drives, devices, or cloud storage.
2. Edit PDFs, add fields, and prepare the final version.
3. Send documents for signatures and track completion.

Because these steps happen in one place, teams often reduce tool switching and simplify the signing process.

Why does OneSpan Sign often feel more security-first?

OneSpan Sign focuses on secure signing experiences, detailed audit trails, tamper-evident features, and administrative controls designed for enterprise governance. The platform complies with a range of industry regulations and security standards, making it suitable for use in regulated industries.

That can create a steeper learning curve for most users, but it can also deliver stronger controls where they matter most.

What is the small enterprise reality that affects security decisions?

Small enterprises rarely fail security audits because they lack a feature. They fail because the security program is too hard to run.

Key constraints:

• Limited security staff: you need policies that are enforceable with minimal overhead.
• Fast deployment requirements: slow rollouts leave teams using paper documents or unmanaged tools.
• Budget constraints: you need predictable pricing and competitive prices for multiple users. Premium plans, which are often billed annually, may offer additional features and cost savings for small enterprises.
• Mixed workflows: one department may need document creation and edit features daily, while another department only needs to sign documents.

This is where pdfFiller’s “all-in-one” approach can reduce complexity, while OneSpan Sign’s enterprise controls can satisfy stricter governance.

How should small enterprises think about risk management?

Threat protection and tamper evidence

Digital signatures are often evaluated for integrity and non-repudiation. NIST describes digital signatures as a mechanism to detect unauthorized modifications and authenticate the identity of a signatory.

OneSpan Sign explicitly emphasizes tamper-sealed documents and audit trail verification flows.
pdfFiller highlights certificate technology and audit logs that support traceability.

Incident response and breach impact

For regulated teams, encryption and access controls reduce breach risk and may also affect notification requirements. HIPAA’s technical safeguards outline required and addressable protections for electronic protected health information, including access control and transmission security.

Practical takeaway: pick the right software, then align it with policies (least privilege, strong authentication, retention rules, and monitoring).

Which industries tend to prefer pdfFiller or OneSpan Sign?

Healthcare (HIPAA)

Healthcare teams often want HIPAA-compliant eSignature workflows, secure file sharing, and audit readiness.

• OneSpan Sign states HIPAA alignment alongside other security standards.
• pdfFiller positions itself for HIPAA-related document workflows, for example, in healthcare.

Finance (SOX, GLBA)

Financial services teams often prioritize strong identity verification and audit trails. OneSpan Sign is frequently evaluated here because of its security-first posture and admin capabilities.

Legal services: evidence and auditability

Legal teams typically want:

• Clear audit trails
• Consistent templates
• Fast document creation and document editing
• A smooth signing process for clients on any mobile device

This is where pdfFiller’s solutions for the legal services workflow can be practical, while OneSpan Sign may be the choice if you need stronger authentication controls.

Government contractors: framework alignment

OneSpan Sign states FedRAMP among its compliance set, which can matter for government-adjacent requirements.
If you are mapping controls to a specific framework (for example, NIST-aligned internal policies), confirm requirements during vendor due diligence.

What does the cost of security look like in real budgets?

Security cost is rarely just the license price. Most digital signature platforms offer a basic plan, a free plan, and other plans with varying features and pricing, allowing users to choose the best fit for their needs and budget. It includes:

• Add-ons for advanced identity checks
• Admin overhead (time to manage policies)
• Support needs during rollout
• Risk reduction value (fewer manual steps, fewer uncontrolled tools)

Pricing visibility and plan fit

Onespan Sign’s pricing depends on the feature set you’d like to include in your plan and may vary. Many electronic signature service plans, including those from competitors, are billed annually, which can offer cost savings over monthly billing cycles.

Overview of OneSpan eSignature pricing with customizable, volume-based plans.

pdfFiller offers convenient plans for businesses of different sizes, with a free 30-day trial. On our pricing page, you can find more information and make your choice.

A screenshot of pdfFiller’s pricing page showcasing the pricing plan options for business: Basic for Enterprise and Premium for Enterprise.

For procurement comparisons, you’ll also see teams evaluate other platforms, such as Dropbox Sign, and other platforms that focus mainly on signature software rather than a full document management stack. For example, in one of our blog articles, you can learn about the features of Zoho Sign compared to pdfFiller.

Which integrations matter most for everyday workflows?

Integrations decide whether your tool becomes a daily system or a standalone portal.

Small enterprises typically prioritize:

• Cloud storage: Google Drive, Dropbox, and similar
• Identity: SSO for enterprise plan environments
• API access for business systems
• E-signature platforms: Adobe Sign is another popular option, known for its robust integration capabilities and compatibility with various business tools.

pdfFiller supports cloud storage integrations and is commonly used as a cloud-based platform connected to tools teams already use. The eSignature functionality is provided by a seamless integration with SignNow. OneSpan Sign highlights open APIs, SDKs, SSO integration, and third-party data fields for automation.

Verdict: Right security for the right size

If your organization needs a security-first eSignature solution with deep enterprise administration, advanced workflow customization, and detailed auditability, OneSpan Sign is often a better fit, especially when you can support a more structured rollout.

If your small enterprise needs secure document management that includes PDF editing, form workflows, collaboration, and eSigning in one cloud-based platform, pdfFiller is typically the more comprehensive option for everyday work. Start your free trial with pdfFiller today to make the experience-based choice!