testssl.sh Alternatives — Web-UI SSL Scanners

Enterno.io Editorial Team

testssl.sh Alternatives in 2026

By Anatoly Oshmanovsky · Updated Apr 17, 2026

Key idea:

testssl.sh (drwetter/testssl.sh) is an open-source BASH script for deep TLS testing since 2014. Covers cipher suites, vulnerabilities (Heartbleed, BEAST, CRIME, POODLE), HSTS, HPKP. Downsides: CLI-only, needs Linux + bash 4, no web UI. Point-and-click alternatives: Enterno.io SSL, SSL Labs, Hardenize, ImmuniWeb Community.

Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.

Try it now — free →

About the Competitor

testssl.sh built by Dirk Wetter in 2014. Open-source (GitHub drwetter/testssl.sh). Bash script using openssl + curl for deep probes. Covers ≈40 vulnerability checks. Free, CLI-only.

Enterno.io vs Competitor — Feature Comparison

Feature	Enterno.io	Competitor
Web UI	✅	❌ CLI only
Vulnerability tests (Heartbleed, BEAST, CRIME)	⚠️ partial	✅ comprehensive
Cipher suite enumeration	✅	✅
HSTS check	✅	✅
Self-hostable	❌	✅
Scriptable for CI/CD	⚠️ API Pro	✅ bash
Rate limit	30/min free	your machine
Mass-domain scan	✅ Pro	✅ bash loop

When to Pick Enterno.io

Quick web UI for 1-2 checks
You don't want to install CLI tooling
You need to share results with a non-technical PM/owner
For deep vulnerability audit — testssl.sh goes further

CertificateExpiry, issuer, domains (SAN)

ChainIntermediate and root CA validation

TLS ProtocolTLS version and cipher suite

VulnerabilitiesHeartbleed, POODLE, weak ciphers

Why teams trust us

TLS 1.3

supported

Full

CA chain check

<2s

result

30/14/7

days-to-expiry alerts

How it works

Enter domain

TLS chain verified

Expiry date & vulnerabilities

What Does the SSL Check Cover?

SSL/TLS is the encryption protocol that protects data between the browser and server. Our tool analyzes the certificate, chain of trust, TLS version, and knownvulnerabilities.

Certificate Details

Issuer, validity period, signature algorithm, covered domains (SAN), and validation type (DV/OV/EV).

Chain of Trust

Full chain verification: from leaf certificate through intermediates to root CA.

TLS Analysis

Protocol version (TLS 1.2/1.3), cipher suites, Perfect Forward Secrecy (PFS) support.

Expiry Alerts

Set up a monitor — get Telegram and email alerts 30/14/7 days before expiration.

DV vs OV vs EV Certificates

DV (Domain Validation)

Confirms domain ownership only
Issued in minutes automatically
Free via Let's Encrypt
Suitable for most websites
Most common certificate type

OV / EV

Organization (OV) or Extended Validation (EV)
Issued in 1-5 business days
Costs $50 to $500/year
For finance, e-commerce, government sites
Increases user trust

Who uses this

DevOps

SSL certificate monitoring

Security

TLS config audit

SEO

HTTPS as ranking factor

E-commerce

customer trust

Common Mistakes

❌

Expired certificateBrowsers block sites with expired SSL. Set up auto-renewal or monitoring.

❌

Incomplete certificate chainWithout intermediate CA, some browsers and bots cannot verify the certificate.

❌

Mixed content on HTTPS siteHTTP resources on an HTTPS page — the browser lock icon disappears, reducing trust.

❌

Using TLS 1.0/1.1Legacy TLS versions have known vulnerabilities. Use TLS 1.2+ or 1.3.

❌

Domain mismatch in certificateThe certificate must cover all site domains, including www and subdomains.

Best Practices

✓

Set up auto-renewalLet's Encrypt + certbot with cron — certificate renews automatically every 60-90 days.

✓

Enable HSTSStrict-Transport-Security header forces browsers to always use HTTPS.

✓

Use TLS 1.3TLS 1.3 is faster (1-RTT handshake) and safer — legacy ciphers removed.

✓

Monitor expiration datesCreate a monitor on Enterno.io — get notified well before expiration.

✓

Verify chain after renewalAfter certificate renewal, confirm that intermediate certificates are installed.

Get more with a free account

SSL certificate monitoring, check history and alerts 30 days before expiry.

Learn more

How-to

Glossary

Research

TLS Cipher Suites 2026: Distribution Report

Errors

Alternatives

Frequently Asked Questions

How to install testssl.sh?

git clone https://github.com/drwetter/testssl.sh && cd testssl.sh && ./testssl.sh example.com

Is coverage comparable?

Enterno.io covers common vulnerabilities + cipher + cert chain. testssl.sh goes deeper (POODLE, BEAST, CRIME detection plus historical CVE checks). For PCI-DSS audits we recommend testssl.sh.

Can I use testssl.sh in CI/CD?

Yes. <code>./testssl.sh --jsonfile report.json --severity HIGH example.com</code>. Then parse JSON into PR comments.

Do I need CLI if I have Enterno?

For 95% of tasks — no. For audit-grade (PCI DSS, security consulting) — testssl.sh complements.