← All vendors
ZZeroSSL
The freemium ACME alternative to Let’s Encrypt — same automation, with a paid tier and a UI.
Public CA (freemium)SaaS (ACME)By HID GlobalSince 2019
- Type
- Public CA (freemium)
- How it works
- Issues DV certificates over ACME like Let’s Encrypt, plus a browser console for teams that would rather click than script. Paid plans from $9.99/month add multi-domain certificates, a management console and support. Owned by HID Global, part of ASSA ABLOY.
- Deployment
- SaaS (ACME)
- Pricing*
- Free tier; paid from $9.99/mo
- Free tier
- Yes
- Open source
- —
- Compliance
- WebTrust, CA/B Forum
- Best for
- ACME with a UI and a support path
- Notable
- Popular Let’s Encrypt fallback
* Indicative list pricing at August 2026 (vendor documentation and public pricing pages, August 2026), not a quote.
Strengths
- Drop-in ACME alternative — useful as a second issuer
- Web console for non-automated workflows
- Paid support exists, unlike Let’s Encrypt
- Generous free tier
Trade-offs
- Free tier is rate-limited and nagged
- Much younger and smaller than the incumbents
- DV only for most use cases
Visit ZeroSSL → Documentation
Listed for comparison as of August 2026 — not an endorsement, and ZeroSSL did not pay for placement. See disclosure.
Compare ZeroSSL with…