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Free TLS certificate authority with REST API, ACME protocol support, and higher rate limits than Let's Encrypt.

Pricing

From $9.99 / mo

Founded

2016

Team size

11-50 employees

Headquarters

Seattle, WA

At a glance

Best for

Solo / freelancer, Startup (1-50), Small business (51-200), Mid-market (201-1,000), Enterprise (1,000+)

Pricing model

Tiered plans

Try before you buy

Free trial · Free plan

Integrates with

ACME clientsREST APIZeroSSL BotHID Global CLM platform

About ZeroSSL

ZeroSSL is a certificate authority and SSL management platform that issues free and paid TLS/SSL certificates with an easy dashboard and ACME automation. Paid tiers add multi-domain, wildcard, longer validity, and management features. It targets developers, agencies, and businesses managing certificates at scale.

Procurement & Fit

Structured facts from the vendor to help your security, finance, and procurement reviews move faster.

Trust

Security & compliance

No certifications listed yet.

SLA uptime target: 99.9%

Security review turnaround: Not specified

DPA available: Not specified

Pricing

Commercial model

Pricing model: Tiered plans

Free trial: Yes

Free plan: Yes

Contract minimum: Not specified

Procurement

Purchasing & legal

The vendor hasn’t added purchasing & legal details yet.

Fit

Best-fit company size

Solo / freelancerStartup (1-50)Small business (51-200)Mid-market (201-1,000)Enterprise (1,000+)

Buyer Fit & Positioning

Implementation & Procurement

Commercial Fit & Ecosystem

Proof, Outcomes & Momentum

Alternatives, Migration & Buyer Objections