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Best acme.sh Alternatives ranked by AI · updated Aug 2026
acme.sh is a lightweight, shell-based ACME client for issuing and renewing TLS certificates from compatible certificate authorities. It targets developers and administrators who need portable automation across servers, DNS providers, and hosting environments.
Top 6 acme.sh alternatives
Let's Encrypt is a free, automated, and open Certificate Authority that provides TLS/SSL certificates for websites.
Caddy is a powerful, extensible server platform that uses HTTPS by default.
Free, with optional paid features
SSL For Free is a web service for issuing free TLS certificates for websites and domains. It is aimed at site owners...
Pros
- Browser-based certificate issuance requires less setup than command-line ACME tools
- Supports common domain validation methods and wildcard certificates
- Provides a dashboard for managing certificates and renewals
Cons
- Free certificates generally require renewal every 90 days
- Less automation and server integration than Certbot or Caddy
- Account and validation workflows can be slower than direct Let's Encrypt automation
Free; paid plans available
ZeroSSL is a free SSL certificate provider that offers easy certificate creation, management, and renewal with automation tools.
Certify The Web is a Windows application that automates ACME certificate issuance, renewal, and deployment for IIS and other services. It is...
Pros
- Provides a richer Windows GUI than most command-line ACME clients
- Automates deployment to IIS and several cloud or hosting targets
- Supports multiple ACME authorities and certificate renewal workflows
Cons
- Windows-focused, unlike cross-platform clients such as Certbot
- Commercial use requires a paid license for many deployments
- More resource-intensive than lightweight command-line clients
Free for personal use; commercial licenses from $49/year
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