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.

Certum SMIME Certificates


Electronic business correspondence is now safer with GDPR-compliant email encryption, signing, and authentication. It confirms the identity of the sender and protects sent emails from possible leakage or modification.


As low as £6.04 / year *

* — with the purchase on 2 years.

All prices excl. VAT



Certum SMIME Mailbox

Fast issuance - within 5 minutes
No organization validation

Degree of trust:
Domain validation
For individuals and organizations

Issued automatically within minutes

Data encryption compliant with GDPR

Includes user's email address

1 year
£7.76 excl. VAT
Buy
2 years
£12.08 excl. VAT *
Buy

Certum SMIME Individual

Issuance from 1 day,
Required the person verification

Degree of trust:
Organization Validation
For individuals and organizations

Issued after the person verification

Data encryption compliant with GDPR

Includes user's email, first and last name

1 year
£21.57 excl. VAT
Buy
2 years
£38.82 excl. VAT *
Buy

Certum SMIME Sponsor

Issuance from 1 day,
Required your company verification

Degree of trust:
Organization Validation
For organisations

Issued after the company verification

Data encryption compliant with GDPR

Includes user's email, first and last name as well as company data

1 year
£23.29 excl. VAT
Buy
2 years
£42.27 excl. VAT *
Buy

Certum SMIME Organization

Issuance from 1 day,
Required your company verification

Degree of trust:
Organization Validation
For organisations

Issued after the company verification

Data encryption compliant with GDPR

Includes your company data

Authenticate your company and general email

1 year
£25.88 excl. VAT
Buy
2 years
£46.58 excl. VAT *
Buy
Info logo

If you need a certificate for mail server
protection, you'll need another certificate:


  • — If you use MS Exchange — UCC
  • — If you use another server — PositiveSSL

We work without prepayment! Test 2 weeks for free!

Place an order and get free of charge

Support


We provide clients with quick, friendly and professional support via email and phone

Free unlimited reissuance


Free unlimited reissuance of the certificates when the private key is lost

Getting an SSL certificate from LeaderSSL is as easy as 1-2-3

Issue the certificate
Install it
Test for 2 weeks
(no payment needed)

Payment Options



Are you ready to try?


Yes! Let's do it for free!

Have any questions?
Call us now +31 20 7640722