Customer service Billing:

Monday — Friday:
9:00 - 18:00 CET time

Technical Support:

Monday — Friday:
9:00 - 18:00 CET time

Ordering system/certificate issuance:

24/7

LeaderTelecom B.V. is VAT-registered with the UK’s HM Revenue and Customs (HMRC) and has a UK VAT number (GB373878249) , so we can charge UK VAT as normal. All invoices for UK customers now include 20% VAT, although still denominated in EUR as the company’s tax residency is the Netherlands.



Get Certum SSL in LeaderSSL: Perfect, Fast and Easy!

Certum EV Code Signing
in the Cloud


As low as £199.84 / year


With the EV Code Signing Certificate, your customers receive a guarantee that the software they use is from a trusted source and has not been modified since it was signed.

  • Digitally sign 32-bit or 64-bit Portable Executable including *.exe, *.cab, *.jar, *.ocx, *.dll etc.
  • Removal of the Microsoft SmartScreen filter and "unknown software publisher" message
  • Verify the code's security and integrity since its signing
  • Reliability and immediate reputation in browsers
  • No physical card or reader required with SimplySign cloud-based solution

* — with the purchase on 3 years.

All prices excl. VAT

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Help me choose SSL Certificate

How are you going to use certificate?
How many domains do you wish to protect?
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LIVE CHAT
Want to know the difference
between DV, OV and EV?




CertumSSL Certificates


Certum Premium EV SSL certificate
For medium to large enterprises.
Differences: Most reliable SSL certificates. Green address bar in web-browser.
Degree of trust:
Extended validation
more info
1 year £129.39
Certum Commercial SSL certificate
For all business.
Differences: Affordable and easy to obtain. Domain Validation. Protect one domain.
Degree of trust:
Domain validation
more info
1 year £10.35
Certum Commercial MultiDomain SSL certificate
For all business & hosting providers.
Differences: Secure multiple domains on a single IP-address with one certificate (multi-domain). For example, you can protect your_site.com, your_site2.com, and your_site3.com with ease and convenience.
Degree of trust:
Domain validation
more info
1 year £10.35
Certum Commercial Wildcard SSL certificate
For all business & hosting providers.
Differences: Protect your main domain and as many subdomains as you want with one certificate (wildcard). For example, you can secure your_domain.com, subdomain1.your_domain.com, subdomain2.your_domain.com and so on.
Degree of trust:
Domain validation
more info
1 year £43.13
Certum Trusted SSL certificate
For small and medium business.
Differences: Show your organization name in the certificate and boost your credibility. This requires organization validation. Safeguard one host from online threats.
Degree of trust:
Organization Validation
more info
1 year £43.13
Certum Trusted MultiDomain SSL certificate
For small and medium business.
Differences: Show your organization name in the certificate and boost your credibility. This requires organization validation. Secure multiple domains. For example, you can protect your_site.com, your_site2.com, and your_site3.com.
Degree of trust:
Organization Validation
more info
1 year £43.13
Certum Trusted Wildcard SSL certificate
For medium to large enterprises.
Differences: One certificate secures the main domain and unlimited numbers of subdomains on your web-site (for example: your_domain.com, subdomain1.your_domain.com, subdomain2.your_domain.com etc.).
Degree of trust:
Organization Validation
more info
1 year £86.26

* - All prices excl. VAT All retail payments are processed in Euros. LeaderSSL can only provide indicative conversion prices in other currencies. Partner payments can be processed in US dollars. The same goes for invoices but, for accounting purposes, all invoices are indicated in Euros regardless of payment currency.We can charge VAT in accordance with the country of your billing address. Final amounts will appear during the checkout process.


Specialized certificates

Certum EV Code Signing in the Cloud certificate
For all businesses.
Differences: verify the code's security and integrity since its signing. Remove "unknown software publisher" message and the Microsoft SmartScreen filter. Extended organization validation. No physical card or reader required with SimplySign cloud-based solution.
Degree of trust:
Extended validation
more info
Shipping method and USB token:
1 year £256.19
Shipping method and USB token:
2 years £414.05
Shipping method and USB token:
3 years £599.51
Certum Standard Code Signing in the Cloud certificate
For all businesses.
Differences: verify the code's security and integrity since its signing. Remove "unknown software publisher" message. Standard organization validation. No physical card or reader required with SimplySign cloud-based solution.
Degree of trust:
Organization Validation
more info
Shipping method and USB token:
1 year £152.68
Shipping method and USB token:
2 years £238.94
Shipping method and USB token:
3 years £312.26
Certum SMIME Mailbox certificate
For individuals and organizations.
Differences: Enhance your email security and integrity, enabling email authorization, encryption, and protection against falsification. Includes user's email address. Issued automatically within minutes.
Degree of trust:
Domain validation
more info
1 year £7.76
2 years £12.08
Certum SMIME Individual certificate
For individuals and organizations.
Differences: Encrypt, sign, and authenticate your personal emails. Includes user's email, first and last name. Data encryption compliant with GDPR. Issued after the person verification.
Degree of trust:
Organization Validation
more info
1 year £21.57
2 years £38.82
Certum SMIME Sponsor certificate
For organizations.
Differences: Business electronic correspondence is now highly secure, with email authorization, encryption, and authentication. Includes user's email, first and last name as well as company data.
Degree of trust:
Organization Validation
more info
1 year £23.29
2 years £42.27
Certum SMIME Organization certificate
For organizations.
Differences: Electronic business correspondence is now safer with GDPR-compliant email encryption, signing, and authentication. Includes your organization data. Authenticate your company and general email.
Degree of trust:
Organization Validation
more info
1 year £25.88
2 years £46.58
Certum Document Signing in the Cloud certificate
For individuals and organizations.
Differences: Advanced digital signature solution designed to secure and automated document signing, greatly expediting document exchange both internally within a company and with external business partners. Supports file formats for Adobe, Office, and LibreOffice. Data contained in the certificate: Name and Surname/Name and Surname and Company Data.
Degree of trust:
Organization Validation
more info
1 year £64.70
2 years £81.95
3 years £99.20

* - All prices excl. VAT All retail payments are processed in Euros. LeaderSSL can only provide indicative conversion prices in other currencies. Partner payments can be processed in US dollars. The same goes for invoices but, for accounting purposes, all invoices are indicated in Euros regardless of payment currency.We can charge VAT in accordance with the country of your billing address. Final amounts will appear during the checkout process.


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Call us now +31 20 7640722