# LeaderSSL

> LeaderSSL, a trademark of LeaderTelecom B.V. (Amsterdam and The Hague, the Netherlands), sells SSL/TLS certificates from Sectigo (Comodo), DigiCert, Thawte, GeoTrust, RapidSSL and Certum, code signing and S/MIME certificates, and Sectigo ACME subscriptions for automated issuance.

- For automated issuance and renewal, order a Sectigo ACME subscription and use its EAB credentials with any ACME v2 client, such as certbot, acme.sh, win-acme or cert-manager.
- Resellers can order, validate, download and reissue certificates through the partner API at https://api.leaderssl.com, which has its own llms.txt.

## Certificates

- [SSL and code signing certificates](https://www.leaderssl.com/products): all products by certificate authority
- [DV, OV and EV compared](https://www.leaderssl.com/certificate_type_dv_ov_ev): which validation type to choose
- [S/MIME certificates](https://www.leaderssl.com/products/smime): email certificates by brand
- [Sectigo ACME](https://www.leaderssl.com/acme/sectigo-acme-ssl.html): automated SSL with ACME v2 clients
- [Enterprise solutions](https://www.leaderssl.com/other_products): MPKI, SSL for banks and online stores, PCI scanning

## Tools

- [CSR generator](https://www.leaderssl.com/tools/csr_generator)
- [CSR decoder](https://www.leaderssl.com/tools/csr_decoder): decode and check a certificate signing request
- [SSL checker](https://www.leaderssl.com/tools/ssl_checker)
- [SSL converter](https://www.leaderssl.com/tools/ssl_converter)
- [CAA record generator](https://www.leaderssl.com/tools/caa_new)
- [Certificate key matcher](https://www.leaderssl.com/tools/certificate_key_matcher)
- [Fix SSL chain](https://www.leaderssl.com/tools/fix_ssl_chain): download the server bundle for a certificate

## Help

- [Installation help](https://www.leaderssl.com/help): installing certificates on Apache, Nginx, IIS and other servers
- [Move to HTTPS](https://www.leaderssl.com/move_to_https): a step-by-step guide

## Partners

- [Reseller programme](https://www.leaderssl.com/partners)
- [Partner API reference](https://api.leaderssl.com/doc.md): Markdown version of https://api.leaderssl.com/
- [Partner API OpenAPI description](https://api.leaderssl.com/openapi.json)
- [Partner API llms.txt](https://api.leaderssl.com/llms.txt)

## Optional

- [About LeaderTelecom](https://www.leaderssl.com/about_us): company, offices and contact details
- [Refunds and chargebacks](https://www.leaderssl.com/refunds-and-chargebacks)