How we test PDF editors & e-signature apps at TheBusinessDive
PDF editors and e-signature tools are often used for important documents – contracts, agreements, forms, and official files. Because of that, how these tools are tested matters.
To stay transparent, below we break down how we evaluate PDF editors and e-signature apps, and what we focus on during testing.
Our testing framework (at a glance)
- Average testing time per tool: 7–21 days
- Number of tools tested: 30+ PDF editors and e-signature tools
- Test scenarios: document editing, signing workflows, and multi-step approval processes
- Platforms tested: Web, mobile, desktop (when available)
- Review process: the same framework is applied across all PDF and e-signature reviews
This structured approach ensures that every tool is evaluated consistently and under comparable conditions.
Our scoring system for PDF editors
Our scoring system for PDF editors is built on 3+ years of hands-on testing across 30+ PDF software and real-world use cases.
The goal is simple: help you quickly decide whether a PDF editor is worth your time — based on structured, repeatable testing criteria, not marketing claims.
Each tool is evaluated across 10 key factors, with a strong emphasis on real functionality and everyday usability.
How we score PDF editors (quick breakdown)
Features & functionality → 60%
User interface → 10%
Security → 10%
Pricing → 10%
Real-world experience → 10%
Features & functionality (60%)
This is the most important part of our evaluation. We test each PDF editor across the following areas:
PDF editing features
We test:
Editing text and images
Adding and rearranging elements
Overall editing workflow and stability
We use each tool on 5–10 real documents to evaluate how it performs in practical scenarios.
PDF reading features
We evaluate:
Available view modes and layouts
Navigation and usability
Additional reading tools
This helps us understand how comfortable the tool is for everyday document consumption.
OCR
We convert 2–4 scanned documents into editable formats and evaluate:
Accuracy (text, tables, formatting)
Handling of complex layouts
Language support
Why this matters: OCR quality directly impacts how usable scanned documents are in real workflows.
Forms and signatures
We test:
Creating and filling forms
Adding and managing signatures
Available signature types (typed, drawn, imported)
We also check flexibility and ease of use in real document workflows.
Conversion and compression
We evaluate:
Converting PDFs to other formats and vice versa
Speed and reliability of conversions
Compression impact on file size and quality
Annotation tools
We test:
Available annotation features
Customization options
Ease of use and workflow integration
User interface (10%)
We evaluate how intuitive and user-friendly the interface is by looking at:
Layout and design
Ease of navigation
Learning curve for new users
Security (10%)
Since PDF editors often handle sensitive documents, security is a key factor.
We evaluate:
Built-in security features
Privacy controls
Reported issues from real users (forums, reviews, etc.)
If we identify concerns, we highlight them in a dedicated section within the review, like we did in case of PDFgear.
Pricing (10%)
We analyze:
Value for money across plans
Availability and limitations of the free plan
Pricing transparency and flexibility
Real-world experience (10%)
Finally, we evaluate how the tool performs in everyday use:
Speed and responsiveness
Stability and bugs
Intrusive elements (popups, limitations)
Overall workflow efficiency
Our scoring system for e-signature software
Our scoring system for e-signature apps is built on 3+ years of hands-on testing across 10+ alternatives and real-world use cases.
Each e-signature software is evaluated across 10 key factors, with a strong emphasis on real functionality and everyday usability.
How we score e-signature apps (quick breakdown)
- Features & functionality → 50%
- User interface → 10%
- Security → 10%
- Pricing → 20%
- Real-world experience → 10%
Features & functionality (50%)
This category makes up 50% of the total score and reflects how powerful and reliable the eSignature tool is in real-world use.
Signatures & core features
We test eSignature apps for at least 5-10 document workflows to see how they handle workflows and how smooth the end-to-end process of signing documents is.
We test:
- How easy it is to create signatures (draw, type, upload, pre-generated styles)
- What customization options are available (initials, styles, editing)
- How smooth it is to add signatures and fields (drag-and-drop, speed, accuracy)
- The variety of fields available (signature, date, text, stamps, custom fields)
- Whether you can pre-fill documents or use advanced field settings (validation, formatting)
- How the signing experience works across devices (desktop, mobile, tablet)
Workflow & automation
We evaluate:
- How easy it is to create and send documents (envelopes, recipients, signing order)
- Whether you can set up multi-step workflows and approval chains
- Availability of automation features (reminders, notifications, status tracking)
- Support for bulk sending or advanced workflows (if accessible)
- Whether the platform offers ready-made workflow templates
We test these features by sending documents to multiple recipients and simulating real approval processes.
Document management
We evaluate:
- How easy it is to create and send documents (envelopes, recipients, signing order)
- Whether you can set up multi-step workflows and approval chains
- Availability of automation features (reminders, notifications, status tracking)
- Support for bulk sending or advanced workflows (if accessible)
- Whether the platform offers ready-made workflow templates
We test these features by sending documents to multiple recipients and simulating real approval processes.
Legal compliance & audit trail
We test:
- Whether the platform complies with major regulations (e.g., ESIGN, eIDAS)
- The quality and detail of the audit trail (timestamps, signer activity, access logs)
- Whether documents include a certificate of completion
- Authentication options (email verification, access control, permissions)
- How well the platform supports secure and legally binding agreements
We review both built-in features and available documentation to assess reliability for real business use.
Integrations
We check during our reviews:
- Available integrations with cloud storage (Google Drive, Dropbox, OneDrive, etc.)
- Compatibility with productivity tools (Google Workspace, Microsoft 365)
- CRM and business tool integrations (e.g., Salesforce, HubSpot)
- Ease of connecting and using integrations in real workflows
- Availability of API for custom integrations
Furthermore, we typically test these integrations by connecting the e-Signature app to the applications we use in our business.
User interface (10%)
We evaluate how intuitive and user-friendly the interface is by looking at:
- Layout and design
- Ease of navigation
- Learning curve for new users
Security (10%)
When testing e-signature apps, we also consider security and privacy, as the documents you work with often contain sensitive data. That said, we check
- Built-in security features (encryption, secure storage, access controls)
- Authentication options (email verification, password protection, role-based permissions)
- Data handling practices and privacy controls
- Whether there are any reported security or privacy concerns from real users on Reddit, TrustPilot, and more.
Pricing (20%)
We evaluate pricing based on value for money, transparency, and how well the plans align with real user needs. Since we test at least 10 alternatives, we can provide an objective view of the pricing plans compared to other eSignature apps.
For pricing, we check both the paid and free plans.
Paid plans
We test:
- Pricing compared to similar eSignature tools with comparable features
- What features are included in each plan (and what is locked behind higher tiers)
- Limitations such as envelope caps or feature restrictions
- Flexibility of plans (monthly vs annual billing, scalability for teams)
- Transparency of pricing and ease of upgrading, downgrading, or canceling
Free plan
We analyze:
- Availability of a free plan or free trial
- What features are included, and what limitations apply
- Whether the free version is usable for real workflows or only for testing
- How well the free plan represents the full product
Real-world experience (10%)
Finally, we evaluate how the Esignature app performs in everyday use based on our own experience:
-
Speed and responsiveness
-
Stability and bugs
-
Overall workflow efficiency
Our testing approach
PDF editors and e-signature tools are used to handle important documents such as contracts, agreements, and official files. Because of that, we do not evaluate them based only on features or basic functionality.
We test these tools by working with real documents and realistic workflows. This includes editing files, reviewing content, signing documents, sharing them with others, and tracking the full process from start to finish.
We also evaluate how tools handle security, performance, and document workflows over time.
This testing framework is used across all of our PDF and e-signature content, including individual reviews, comparisons, and best-of guides. All recommendations are based on this same evaluation process, not on one-off impressions.
Testing duration & depth
Each tool is tested for at least 1–3 weeks, not just a quick trial.
We use every tool across multiple document workflows to understand how it performs over time. This includes editing different file types, handling complex documents, and testing complete signing processes.
Why PDF editors and e-sign tools are hard to compare
PDF editors and e-signature tools often overlap in functionality, but they are used in very different ways depending on the situation.
From our testing, here are the main reasons they are difficult to compare:
- Different use cases. Some users only sign documents occasionally, others manage full document workflows
- File complexity. Simple PDFs behave differently from long contracts or scanned documents
- Security requirements. Some users need advanced compliance and audit trails
- Feature overlap. Many tools combine editing and signing in different ways
- Pricing structure. Limits are often tied to usage, signatures, or document volume
Because of this, a feature list alone does not reflect how a tool performs in real-world use.
Real scenarios we test
We do not just explore features. We simulate real document workflows:
- Editing existing PDFs with text and images
- Working with scanned files and OCR
- Preparing documents for multiple signers
- Running full signing and approval flows
- Tracking document status and audit history
This helps us understand how each tool performs in realistic conditions.
How we test PDF editors and e-sign tools
We do not rely on demos or sample files. We use each tool with real documents over time.
We upload files, edit content, prepare documents for signing, and complete the entire process from start to finish. We test both simple and complex workflows to evaluate consistency.
As part of testing, we:
- prepare documents with multiple signers
- test different signing and approval flows
- review audit logs and document history
- work with both simple and complex files
During testing, we look for clear answers to questions like:
- Is the tool easy to use when working with real documents?
- Does the signing process work smoothly for all participants?
- Does the tool remain reliable with larger or more complex files?
Testing across multiple scenarios helps us identify strengths and limitations.
Proof of testing
What we don’t do
Just as important as what we test is what we intentionally avoid:
- We do not rely only on demos or marketing claims
- We do not rank tools based on affiliate commissions
- We do not test tools for only a few hours
- We do not assume one tool works for every use case
Document workflows vary widely, and oversimplifying them would not be helpful.
How we make recommendations
Instead of naming a single “best” tool, we focus on specific use cases, such as:
- Best for basic PDF editing
- Best for advanced document workflows
- Best for frequent e-signatures
- Best budget option
This makes it easier to choose a tool based on how it will actually be used.
Instead of naming a single “best” tool, we focus on specific use cases, such as:
- Best for quick capture and simple notes
- Best for long-term knowledge management
- Best for cross-device access
- Best budget option
This makes it easier to choose a tool based on how you think and organize information.
How often are reviews updated
PDF editors and e-signature tools evolve regularly. Features change, security standards update, and pricing structures shift.
We revisit reviews when:
- pricing changes
- major features are released
- signing or security workflows change
Keeping reviews up to date is part of our process.
Transparency & monetization
Some of our articles include affiliate links. If you sign up through one of them, we may earn a commission at no extra cost to you.
This never influences how tools are tested, ranked, or recommended.