CA - acmesh-official/acme.sh GitHub Wiki
Comparison of the features offered for free by the supported CAs:
| CA | MaxLifetime | ECC Chain | Domain Count | Wildcard | IPv4 | IPv6 | NotBefore | NotAfter | IDN | Test Server |
|---|---|---|---|---|---|---|---|---|---|---|
| Let's Encrypt | 90 | Full | 100 | Yes | No | No | No | No | Yes | Yes |
| ZeroSSL | 90 | Full | 100 | Yes | No | No | Yes (+1d) | Yes | Yes | No |
| 90 | Partial | 100 | Yes | No | No | No | Yes | Yes | Yes | |
| Actalis.com | 90 | Partial | 2 | No | No | No | No | No | Yes | No |
| SSL.com | 104 | Partial | 2 | No | No | No | No | No | Yes | No |
Details for CAs servers are available here: Server