ZeroSSL
Certificate authority issuing 90-day and annual SSL certificates with ACME automation and a REST API.
Best for: Developers and site owners who want to automate certificate issuance and renewal through ACME clients or an API.
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Ranked by Overall Score: our Editor Rating and Market Signal, 50/50. Market Signal uses Ahrefs and Semrush data through September 2026, pulled October 6 to 19, 2026. How we score
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Certificate authority issuing 90-day and annual SSL certificates with ACME automation and a REST API.
Best for: Developers and site owners who want to automate certificate issuance and renewal through ACME clients or an API.
Website monitoring for uptime, page speed and domains.
Best for: Small web teams and agencies that want several website-health checks and customer-facing status pages from one monitoring service.
Business video hosting with lead capture, engagement heatmaps, SEO, and custom players.
Best for: Marketing teams that need private business video hosting with lead capture and viewer-level engagement analytics.
Membership video platform with live streaming, branded apps, community, and subscriptions.
Best for: Creators and membership businesses monetizing on-demand video and recurring live programming for paying audiences.
Desktop screen recorder and video editor for tutorials, demos, training, and presentations.
Best for: Educators, trainers, and product teams producing polished screen-recorded instructional videos.
WordPress security platform focused on vulnerability intelligence, virtual patching, and plugin-level protection.
Best for: WordPress site owners, agencies, and hosting providers that want vulnerability-focused protection and virtual patches for plugins and themes.
Continuous vulnerability management platform for external infrastructure, cloud environments, and web applications.
Best for: Small and midsize security teams that need recurring vulnerability scanning and prioritization across external infrastructure and cloud assets.
Browser webinar platform for live, on-demand, recurring, and automated events with engagement analytics.
Best for: B2B marketing and customer teams that need browser-based webinars with registration automation and CRM synchronization.
Marketing webinar platform with registration, engagement tools and automated events.
Best for: Marketing teams that use webinars for lead generation, product education, and nurture campaigns.
Continuous pentest platform pairing AI-driven DAST scanning with expert-led penetration testing.
Best for: SaaS companies and engineering teams that need recurring pentests and compliance-ready reports for SOC 2 or ISO 27001 audits.
Webinar platform for live and automated presentations with registration, offers, polls, chat, and replays.
Best for: Marketers and course businesses that use webinars to present offers, educate leads, and run recurring campaigns.
Application security platform covering web, API and mobile.
Best for: Security teams that need coordinated testing and monitoring across web applications, APIs, mobile apps, and exposed digital assets.
Conversion-focused video hosting with Play Gates, smart autoplay, testing, and revenue analytics.
Best for: Direct-response marketers using video sales letters and wanting conversion data tied to individual viewer behavior.
External attack-surface and application security testing driven by automated scans and security researcher findings.
Best for: Application-security and security teams that need continuous testing of internet-facing web assets and externally exposed attack surfaces.
Enterprise video platform combining hosting, live streaming, interactivity, and audience analytics.
Best for: Enterprises and media teams managing branded on-demand or live video experiences across websites, apps, and marketing systems.
Browser-based live event platform with registrations, multi-session events and studio production.
Best for: Creators, educators, and community teams that want interactive live events without attendee software installation.
Sectigo-owned website security service that scans for malware, removes infections and patches vulnerabilities.
Best for: Small business and WordPress site owners who want malware cleanup handled for them after a hack.
NETSCOUT's Arbor DDoS line: Sightline, TMS, Arbor Edge Defense and the Arbor Cloud scrubbing service.
Best for: Internet service providers, hosting companies and large enterprises that run their own networks and data centers.