Which is better, ConvertAPI or pdfFiller?

ConvertAPI edges out pdfFiller based on user ratings across 22 reviews. That said, the best pick depends on your workflow — pdfFiller may be a stronger fit for specific team sizes or use cases. Review the full comparison to decide.

What are the main differences between ConvertAPI and pdfFiller?

Key differences between ConvertAPI and pdfFiller include pricing (ConvertAPI starts at undisclosed vs pdfFiller at $8); target audience (ConvertAPI targets Individuals while pdfFiller serves Large Enterprises); free trial availability (pdfFiller offers one, ConvertAPI does not). Use the Spotsaas comparison table to evaluate each dimension before deciding.

Do both ConvertAPI and pdfFiller offer a Free trial?

pdfFiller offers Free Trial, but ConvertAPI does not.

Who are the typical users of ConvertAPI?

ConvertAPI is designed for Individuals, Large Enterprises, Medium Business, Small Business.

Who are the typical users of pdfFiller?

pdfFiller is designed for Large Enterprises, Medium Business, Small Business.

What is the starting price of ConvertAPI and pdfFiller?

The starting price of pdfFiller is $8/Month. Pricing for ConvertAPI is unavailable.

What are the best alternatives to ConvertAPI?

Some top alternatives to ConvertAPI include Documint, Doc Converter Pro, PDF Convert Free, PDFtoExcel.com, Adobe Acrobat DC.

What are the best alternatives to pdfFiller?

Some top alternatives to pdfFiller include Documint, Adobe Acrobat DC, PDFelement, Fill, Adobe Sign.

ConvertAPI vs pdfFiller Comparison

Last updated: May 19, 2026

ConvertAPI

4.7(22 reviews)

Starting at Contact for pricing

Individuals
Large Enterprises

ConvertAPI is an optimized platform designed to streamline file conversion in minutes. Our API supports conversions of Word, Excel, PowerPoint, HTML, PDF and Image formats with secure 256-bit SSL encryption and authentic…

View Pricing Read Reviews

pdfFiller

4.5(8,757 reviews)

Starting at $8 /Month

Free Trial
Large Enterprises
Medium Business

pdfFiller allows users to quickly and easily create PDF files on their Windows PC. Users can fill a PDF form with their own data, or upload an existing Microsoft Word template. Once filled, a PDF document can be saved fo…

View Pricing Read Reviews

ConvertAPI leads on user satisfaction with a 4.7-star rating across 22 reviews.

ConvertAPI vs pdfFiller — at a glance

Feature	ConvertAPI	pdfFiller
Rating	4.7 / 5	4.5 / 5
Reviews	22	8,757
Starting price	Contact for pricing	$8 /Month
Free trial	No	Yes
Free version	No	No
Best for	Individuals, Large Enterprises, Medium Business	Large Enterprises, Medium Business, Small Business
Category	Document Creation Software	Document Creation Software
Platforms	SaaS/Web/Cloud	SaaS/Web/Cloud, Mobile - Android, Mobile - iOS, Installed - Windows, Installed - Mac
API	Available	Available
Support modes	Online	24/7 (Live rep)
Certifications	GDPR	SOC 2, HIPAA, GDPR
Data residency	Global	US

Key differences between ConvertAPI and pdfFiller

Pricing: pdfFiller starts at $8 /Month. ConvertAPI pricing is not publicly listed.
Free trial: pdfFiller offers a free trial; ConvertAPI does not.
Target audience: ConvertAPI is built for Individuals and Large Enterprises, while pdfFiller targets Large Enterprises and Medium Business.
User satisfaction: ConvertAPI scores higher with a 4.7-star average.
Deployment: ConvertAPI supports SaaS/Web/Cloud; pdfFiller supports SaaS/Web/Cloud, Mobile - Android, Mobile - iOS, Installed - Windows, Installed - Mac.

ConvertAPI vs pdfFiller — find the better fit before you commit.

Which tool fits your team best

Which is actually cheaper for your team size

Where each product wins, per real buyers

Most Document Creation Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.

Biggest differences

Features

Pricing

Buying details

Security

Buyer feedback

Integrations

Product tour

Other options

	ConvertAPI (90) Talk to an expert Talk to an expert	pdfFiller (3236) Talk to an expert Talk to an expert

Biggest differences

Affiliate Disclosure

Start here before you go deeper into features.

ConvertAPI

Best for developers needing secure, multi-format file conversion APIs.

Choose if

You require quick integration of file conversions into software workflows.
Your team values flexible pricing including a free tier for testing.
You handle sensitive documents needing 256-bit SSL encrypted transfers.

Consider alternatives if

You need comprehensive API documentation and extensive developer support.
Your projects demand guaranteed API stability without unexpected breaking changes.

pdfFiller

Best for simple, efficient PDF form creation and filling on Windows PCs.

Choose if

You need to quickly fill and save PDF forms repeatedly with saved data.
Your workflow requires easy integration of Microsoft Word templates into PDFs.
You want built-in emailing and WYSIWYG printing options within a streamlined app.

Consider alternatives if

Your team requires advanced document workflow automation or extensive collaboration features.
You need cross-platform or mobile support beyond Windows.

ConvertAPI: Best for developers needing secure, multi-format file conversion APIs. pdfFiller: Best for simple, efficient PDF form creation and filling on Windows PCs.

Description	ConvertAPI is an optimized platform designed to streamline file conversion in minutes. Our API supports conversions of Word, Excel, PowerPoint, HTML, PDF and Image formats with secure ... Read More about ConvertAPI	pdfFiller allows users to quickly and easily create PDF files on their Windows PC. Users can fill a PDF form with their own data, or upload an existing Microsoft Word template. Once filled, ... Read More about pdfFiller
Entry Level Pricing	Not Available	Starts from $8 , Billed Yearly
Free Trial Availability	No free trial	Get Free Trial
User Ratings Based on verified Spotsaas reviews	4.7 (22)	4.5 (8757)
Best Company Size	Small BusinessMedium Business	1-50 employees51-500 employees
	Get pricing help	Get pricing help

Software Demo

Demo	ConvertAPI has not given any software demo yet If you're the owner of this profile, add your demo.Contact us

Need a second opinion?

Get shortlist help from a software advisor

Share your priorities, budget, and team needs, and we’ll help you narrow the options and understand the tradeoffs before you talk to vendors.

Compare ConvertAPI and pdfFiller on pricing

Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.

Pricing Option
Starting From	Not Available	$8 , Billed Yearly
Pricing Plans	Not Available	Basic Get Started One User Edit, fill, draw, print, save, or fax Convert PDFs to editable word documents Show more + Premium Get Started Up to 5 users Send documents out to be signed using SignNow USLegal Forms Library Show more + airSlate Business Cloud Get Started Minimum 10 Users The most powerful PDF editor Business process automation Show more +
Pricing Page
	View detailed pricing	View detailed pricing

Other Details

Organization Types supported	Small Business Freelancers Medium Business Large Enterprises Individuals	Small Business Freelancers Medium Business Large Enterprises Individuals
Platforms Supported	Browser Based (Cloud) Mobile - iOS Mobile - Android Installed - Windows Installed - Mac Mobile - Windows Browser Based (Cloud)	Browser Based (Cloud) Mobile - iOS Mobile - Android Installed - Windows Installed - Mac Mobile - Windows Browser Based (Cloud)
Modes of support	24/7 (Live rep) Business Hours Online	24/7 (Live rep) Business Hours Online
API Support	Available	Available
	Get help choosing	Get help choosing

Security & Compliance

Certifications, data handling, and security controls for IT and compliance evaluators.

SOC 2	—	✓ Yes
HIPAA	—	✓ Yes
GDPR	✓ Yes	✓ Yes
Single Sign-On (SSO)	—	✓ Yes
Multi-Factor Auth (MFA)	—	✓ Yes
Data Encryption	✓ Yes	✓ Yes
Audit Logs	—	✓ Yes
Data Residency	🌐 Global	🇺🇸 US

ConvertAPI User Reviews & Rating Comparison

User Ratings	4.7 (based on 22 reviews)	4.5 (based on 8757 reviews)
Rating Distribution	70 16 0 0 4	2785 308 52 10 81
Spotsaas Editor’s POV generated by AI	Buyer sentiment Overall, users appreciate ConvertAPI's reliable service, ease of integration, and user-friendly interface, though some express concerns about API stability and limited documentation. What buyers like Ease of use Integration capabilities Customer support Common complaints API stability issues Limited documentation	Buyer sentiment Users generally appreciate pdfFiller for its ease of use and efficient PDF form handling, though some desire more advanced features and clearer pricing. What buyers like Ease of use Form filling efficiency Integration with Word templates Common complaints Lack of advanced collaboration features Pricing transparency
Pros and Cons	Seamless integration into existing workflows and niche sites User-friendly interface simplifying file conversion processes Variety of pricing plans including a free option for easy adoption Major API changes without prior notification causing disruptions Occasional API functionality issues such as sudden stoppages	Easy PDF form filling and creation on Windows Ability to save and reuse data for repeated form filling Integrated emailing and printing options within the app Limited advanced workflow or collaboration features No publicly available pricing details
Positive Reviews	No reviews available for the product	No reviews available for the product
	Read reviews	Read reviews

List of Customers

Customers	Hubspot Showbie Prezi	No Customers information available.

Media and Screenshots

Screenshots	No screenshots available.	4 Screenshots
Videos	No videos available.	2 Videos

Top Alternatives to ConvertAPI and pdfFiller in 2026

Alternatives	Documint Doc Converter Pro 4.1 PDF Convert Free 4.4	Documint Adobe Acrobat DC 4.5 PDFelement

Disclaimer: This research has been collated from a variety of authoritative sources. We welcome your feedback at [email protected].

Frequently asked questions

Which is better, ConvertAPI or pdfFiller?: ConvertAPI edges out the other on user ratings (4.7 vs 4.5). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
Do ConvertAPI and pdfFiller offer a free trial?: pdfFiller offers a free trial. ConvertAPI does not.
What is the starting price of ConvertAPI vs pdfFiller?: ConvertAPI starts at Contact for pricing. pdfFiller starts at $8 /Month.
What are the top alternatives to ConvertAPI?: Top alternatives to ConvertAPI include Documint, Doc Converter Pro, PDF Convert Free, PDFtoExcel.com, Adobe Acrobat DC.
What are the top alternatives to pdfFiller?: Top alternatives to pdfFiller include Documint, Adobe Acrobat DC, PDFelement, Fill, Adobe Sign.

ConvertAPI vs pdfFiller Comparison

ConvertAPI

pdfFiller

ConvertAPI vs pdfFiller — at a glance

Key differences between ConvertAPI and pdfFiller

ConvertAPI vs pdfFiller — find the better fit before you commit.

ConvertAPI

pdfFiller

Biggest differences

Description

Entry Level Pricing

Free Trial Availability

User Ratings

Best Company Size

Software Demo

Demo

Get shortlist help from a software advisor

Compare ConvertAPI and pdfFiller on pricing

Other Details

Organization Types supported

Platforms Supported

Modes of support

API Support

Security & Compliance

ConvertAPI User Reviews & Rating Comparison

List of Customers

Customers

Media and Screenshots

Screenshots

Videos

Top Alternatives to ConvertAPI and pdfFiller in 2026

Frequently asked questions