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Zadarma VS Cert Decoder

Compare Zadarma VS Cert Decoder and see what are their differences

Zadarma

A new generation of VoIP for your business. Zadarma offers virtual phone numbers in 100+ countries, cloud PBX, and CRM systems.

Zadarma Landing page
Rating
4.3 · 6 reviews
Pricing
Open source Freemium Free trial
Is it good? Alternatives
Cert Decoder

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Cert Decoder screenshot
Rating
0 reviews
Pricing
Free
Is it good? Alternatives
VoIPstudio
VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s affordable, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Zadarma should be more popular than Cert Decoder. It has been mentioned 4 times since March 2021.

social mentions
4 vs 1
VoIP popularity
100% vs 0%

Base details

Website, pricing, platforms and company facts side by side.

Zadarma
Cert Decoder
Website zadarma.com certdecoder.com
Pricing
Open source Freemium Free trial Official pricing
Free
Platforms
Windows iOS Android
Web
Company 2006 —
Listed in
VoIP PBX Cloud Business Telephony Virtual Phone Number Customer Support CRM Live Chat Help Desk +5
SSL Certificates Decoding Website Monitoring Monitoring Tools +1

About Zadarma and Cert Decoder

In their own words, as submitted to SaaSHub.

Zadarma
Cert Decoder

Zadarma enables you to set up your business phone system without heavy hardware and wiring expenses. What features does Zadarma’s PBX phone system offer? - Virtual phone numbers in more than 100 countries - Call recording and call transfer with call performance statistics - PBX integration with...

Read more about Zadarma

Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.

Read more about Cert Decoder

Features and specs

What each product offers, as listed by its team.

Zadarma 3 features
Cert Decoder 4 features
  • "Standard" price plan
    $0
  • "Office" price plan
    $22
  • "Corporation" price plan
    $44
  • User-Friendly Interface
    Cert Decoder is designed with a simple and intuitive interface that makes it easy for users to navigate and use the tool without requiring extensive technical knowledge.
  • Comprehensive Analysis
    The tool provides detailed analyses of certificates, including information about validity, issuer, encryption algorithms, and more, helping users understand their security certificates thoroughly.
  • Free to Use
    Cert Decoder offers its services free of charge, making it accessible for individuals and organizations without budget constraints.
  • Quick Processing
    The tool processes certificate information rapidly, providing almost instant results for users, which is crucial for time-sensitive tasks.

Possible disadvantages

  • Limited Advanced Features
    Compared to some paid alternatives, Cert Decoder might lack advanced features that are necessary for more complex certificate management and diagnostics.
  • Reliance on Internet Access
    Users need an active internet connection to utilize the tool, which can be a limitation in areas with unreliable internet service.
  • Privacy Concerns
    While using an online service to decode certificates, there can always be privacy concerns regarding sensitive data being uploaded to a third-party server.
  • No Offline Mode
    Cert Decoder does not offer an offline mode, which could be a drawback for users who require functionality without constant internet availability.

Analysis

An editorial look at what each product does well and who it suits.

Zadarma
Cert Decoder

Overall verdict

  • Overall, Zadarma is a solid choice for individuals or businesses seeking reliable VoIP services. Its feature set, pricing, and customer support make it suitable for a variety of communication needs.

Why this product is good

  • Zadarma is generally considered a good option for VoIP services because it offers competitive pricing, a wide range of features, and flexibility in choosing plans. Users appreciate its extensive international call coverage and integration capabilities with various business tools. The service also provides robust support options and has a user-friendly interface.

Recommended for

  • Small to medium-sized businesses looking for affordable VoIP solutions.
  • Individuals or freelancers who need international calling at competitive rates.
  • Companies that require easy integration of VoIP with CRM or other business tools.

Overall verdict

  • Cert Decoder appears to be a free online tool for decoding and inspecting SSL/TLS certificates, CSRs, and related cryptographic data, making it useful for quick, no-install certificate analysis, though it should be used with awareness of general web tool privacy considerations when handling sensitive certificate data.

Why this product is good

  • Provides quick, browser-based decoding of certificates without needing to install software
  • Useful for troubleshooting SSL/TLS certificate issues on the fly
  • Simple interface aimed at both technical and semi-technical users
  • No cost to use for basic certificate decoding tasks

Recommended for

  • System administrators needing to quickly verify certificate details
  • Developers debugging SSL/TLS configuration issues
  • IT support staff troubleshooting website certificate errors
  • Students or professionals learning about certificate structure and encoding

Videos

Walkthroughs and reviews on video.

Zadarma 4 videos + Add
Cert Decoder 0 videos + Add

Zadarma and Shopify Integration

More videos

  • Review - Testing Zadarma Apps
  • Review - Zadarma - Phone System for Small & Medium Businesses
  • Review - Zadarma Virtual Phone Numbers

No Cert Decoder videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Zadarma
Cert Decoder
100% 100%
VoIP
0% 0%
0% 0%
Decoding
100% 100%
100% 100%
Customer Support
0% 0%
0% 0%
Monitoring Tools
100% 100%

Questions & Answers

As answered by people managing Zadarma and Cert Decoder.

What's the story behind your product?

Cert Decoder's answer:

I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.

Which are the primary technologies used for building your product?

Cert Decoder's answer:

certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server

How would you describe the primary audience of your product?

Cert Decoder's answer:

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

Why should a person choose your product over its competitors?

Cert Decoder's answer:

Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.

Who are some of the biggest customers of your product?

Cert Decoder's answer:

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

User comments

Share your experience with using Zadarma and Cert Decoder. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Zadarma 4.3 · 6 reviews
Cert Decoder no reviews yet
  • Quality of the service and really impressive support!!!
    SaaSHub review
    · Mar 2026

    Versatile VoIP platform that offers a robust suite of tools

  • Works like a charm
    SaaSHub review
    · Mar 2026

    For the price I expected something basic but this feels high-end. Everything from setup to sound quality is professional. Recommending Zadarma to my friends and partners.

  • Highly recommended
    SaaSHub review
    · Mar 2026

    I use Zadarma daily for my business need, and certainly can say - it was good choice. It helps to organize my remote work and employees in different countries. Good pricing, easy to use, friendly support.

View more

We have no reviews of Cert Decoder yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Zadarma 4 mentions
Cert Decoder 1 mention
  • Any solution for virtual international numbers
    You can use a service like Zadarma that allows you to buy virtual numbers in various countries. You cannot tie this to your Fi account but you can run the Zadarma app on your phone to make and receive calls using the virtual number. Some... Source: over 3 years ago
  • Voip for Small Business - Options seem lacking
    Zadarma.com - Landline US number with IVR and other features costs 2 USD, it also receives SMS messages and can forward them to the app or email/messengers. However, you cannot send SMS from a landline number, just reception. You can... Source: over 3 years ago
  • Virtual Phone Number
    Https://zadarma.com/en/ - very good product.. Easy to use and hassle free. Source: almost 5 years ago

View more

  • Banana.dog back from the dead
    Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago

Alternatives to Zadarma and Cert Decoder

When comparing Zadarma and Cert Decoder, you can also consider the following products.

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