Compare CatchJS vs. Checkly

NetCrunch is commercial, self-hosted, agentless network and IT infrastructure monitoring software for Windows Server. It monitors network devices, servers, virtualization platforms, cloud services, applications, websites, logs, telemetry, and network traffic across distributed environments. NetCrunch supports 680+ monitoring targets and provides 270+ ready-to-use Monitoring Packs for devices, applications, and operating systems. Policy-based monitoring automatically applies monitoring settings, Monitoring Packs, thresholds, and alerts to matching devices and systems. Licensing is based on monitored nodes and network interfaces rather than individual sensors, checks, or metrics. NetCrunch provides real-time dashboards and automatic Layer 2 and routing topology maps for visibility into network status and performance. Network traffic analysis supports NetFlow, sFlow, IPFIX, and other flow technologies. Its alerting system supports event correlation, dependency-aware suppression, predictive thresholds, escalation, and 40+ automated response actions, including scripts, notifications, API calls, and integrations with external systems. Distributed Monitoring Probes extend monitoring to remote and isolated locations. NetCrunch also provides a REST API for integration and automation with external IT management, service management, and operational systems. NetCrunch is self-hosted on Windows Server and can monitor on-premises, air-gapped, cloud, and hybrid IT environments.

Overmonitor is cloud-based infrastructure, website, and endpoint monitoring built for teams that want fast setup, clear alerts, and practical visibility without the complexity or cost of enterprise monitoring suites. Monitor websites, servers, endpoints, processes, Windows services, event logs, uptime, response time, SSL certificates, and internal network health from one easy dashboard. At the core of Overmonitor is a small, lightweight server agent that installs quickly, pairs with your account, and reports a heartbeat every minute from inside your network. This gives you visibility beyond public uptime checks, helping detect server outages, stalled services, failing processes, internal connectivity problems, and endpoint health issues before they become customer-facing downtime. Overmonitor supports city-level geotargeted monitoring, practical maintenance windows that reduce alert noise, push notifications for alerts, audible dashboard alerts for operations screens, process monitor rollups, embeddable performance graphs, and flexible à la carte pricing so you only pay for the monitoring you need. Designed for SaaS operators, IT teams, MSPs, developers, and small businesses, Overmonitor helps you track availability, analyze website performance, monitor infrastructure health, and improve end-user experience without being locked into a bloated monitoring platform.

Uptime.com website monitoring solutions provide unmatched visibility and availability, empowering engineering, operations and SRE teams to monitor & respond to their most essential services. Simple & intuitive industry leading Enterprise-grade features delivered at a fair price, that are continuously improving. G2, Sourceforge and TechRadar Pro have recognized us as one of the world’s best uptime monitors for several consecutive years, including this one. Try 100% free.

c/side: The Client-Side Platform for Cybersecurity, Compliance, and Privacy Monitoring third-party scripts effectively eliminates uncertainty, ensuring that you are always aware of what is being delivered to your users' browsers, while also enhancing script performance by up to 30%. The unchecked presence of these scripts in users' browsers can lead to significant issues when things go awry, resulting in adverse publicity, potential legal actions, and claims for damages stemming from security breaches. Compliance with PCI DSS 4.0.1, particularly sections 6.4.3 and 11.6.1, requires that organizations handling cardholder data implement tamper-detection measures by March 31, 2025, to help prevent attacks by notifying stakeholders of unauthorized modifications to HTTP headers and payment information. c/side stands out as the sole fully autonomous detection solution dedicated to evaluating third-party scripts, moving beyond reliance on merely threat feed intelligence or easily bypassed detections. By leveraging historical data and artificial intelligence, c/side meticulously analyzes the payloads and behaviors of scripts, ensuring a proactive stance against emerging threats. Our continuous monitoring of numerous sites allows us to stay ahead of new attack vectors, as we process all scripts to refine and enhance our detection capabilities. This comprehensive approach not only safeguards your digital environment but also instills greater confidence in the security of third-party integrations.

The ultimate uptime monitoring service. Get 50 monitors with 5-minute checks completely free. Set up in seconds and stay informed about your website’s health at all times. Website monitoring: Get instant alerts when your website goes down. Reliable and accurate monitoring helps you fix issues before they affect users and prevent revenue loss. SSL certificate monitoring: Avoid losing visitors due to expired SSL certificates. Get notified 30 days before expiration so you can renew in time. Ping and port monitoring: Check if your server is online or if your email service is running on port 465. Monitor any port you need with real-time alerts. Cron job monitoring: Track scheduled tasks with heartbeat monitoring. We verify if the request arrives on time, making sure server-side jobs and internet-connected devices are running properly. Status pages: Create up to 100 branded status pages, protect them with a password, and allow subscribers to receive updates. Stay informed with email, SMS, voice calls, push notifications, or integrations with Slack, Zapier, PagerDuty, Telegram, Discord, Microsoft Teams, Google Chat, and more. Maintenance windows: Pause monitoring when you schedule downtime to avoid unnecessary alerts

Grafana Labs delivers the leading AI-powered observability platform, built around Grafana—the most widely adopted open source technology for dashboards and visualization. Recognized as a Leader in the 2025 Gartner® Magic Quadrant™ for Observability Platforms, Grafana Labs supports more than 25 million users and thousands of organizations worldwide, from startups to Fortune 500 enterprises. Grafana Cloud is the open observability cloud, designed to help engineering teams observe everything and solve anything. Built on open source, open standards, and open ecosystems, it unifies metrics, logs, traces, and profiles in a single platform for full-stack visibility across applications, infrastructure, and digital experiences. At the core is the open-source LGTM stack: Grafana for dashboards and visualization, Mimir for metrics, Loki for logs, and Tempo for distributed tracing. Native OpenTelemetry and Prometheus support allow teams to ingest telemetry from virtually any environment, while hundreds of integrations connect existing tools and data sources without costly rip-and-replace migrations. Grafana Cloud combines powerful analytics with AI-driven observability. Grafana Assistant helps engineers investigate issues, explore telemetry, and troubleshoot faster. Adaptive Telemetry identifies the data that matters most and aggregates the rest, helping organizations reduce telemetry costs while preserving valuable insights . With solutions for Kubernetes monitoring, application observability, digital experience monitoring, incident response, synthetic monitoring, and performance testing, Grafana Cloud delivers a complete observability platform that scales with your business.

Gaffa is a REST API built for web scraping and browser automation, allowing developers to run real, full browsers at scale with a single API call. It removes the difficulty of managing headless browser frameworks, rotating proxies, CAPTCHA solving, and scaling infrastructure, all of which are handled automatically. JavaScript-heavy and dynamic websites render exactly as they would for a human visitor by default. Beyond standard scraping, Gaffa supports AI-driven structured data extraction (extract data into a defined schema without writing CSS selectors), screenshot and PDF capture, infinite-scroll and form-filling automation, and clean Markdown conversion for feeding webpages directly into LLM and RAG pipelines. A rotating residential proxy network keeps access reliable across regions, and a credit-based pricing model means teams pay only for the browser time and bandwidth they actually use. Gaffa is designed for AI engineers, data teams, and developers who want production-grade web data extraction without having to build and maintain their own infrastructure.

Empower Your Existing Team to Attain Enterprise-Level Security Introducing a comprehensive solution that combines SIEM, endpoint visibility, continuous monitoring, and automated responses to simplify processes, enhance visibility, and accelerate response times. We manage the burdens of security, allowing you to reclaim valuable time in your schedule. With ready-to-use detections, filtered alerts, and established response playbooks, IT departments can derive substantial security benefits through Blumira. Fast Setup, Instant Benefits: Seamlessly integrates with your technology ecosystem and is fully operational within hours, eliminating any waiting period. Unlimited Data Ingestion: Enjoy predictable pricing alongside limitless data logging for comprehensive lifecycle detection. Streamlined Compliance: Comes with one year of data retention, ready-made reports, and round-the-clock automated monitoring. Exceptional Support with a 99.7% Customer Satisfaction Rate: Benefit from dedicated Solution Architects for product assistance, a proactive Incident Detection and Response Team developing new detections, and continuous SecOps support around the clock. With this robust offering, your team can focus on strategic initiatives while we handle the intricacies of security management.

Around 25 million engineers work across dozens of distinct functions. Engineers are using New Relic as every company is becoming a software company to gather real-time insight and trending data on the performance of their software. This allows them to be more resilient and provide exceptional customer experiences. New Relic is the only platform that offers an all-in one solution. New Relic offers customers a secure cloud for all metrics and events, powerful full-stack analytics tools, and simple, transparent pricing based on usage. New Relic also has curated the largest open source ecosystem in the industry, making it simple for engineers to get started using observability.

Source Defense is an essential element of web safety that protects data at the point where it is entered. Source Defense Platform is a simple, yet effective solution to data security and privacy compliance. It addresses threats and risks that arise from the increased use JavaScript, third party vendors, and open source code in your web properties. The Platform offers options for securing code as well as addressing an ubiquitous gap in managing third-party digital supply chains risk - controlling actions of third-party, forth-party and nth-party JavaScript that powers your website experience. Source Defense Platform provides protection against all types of client-side security incidents, including keylogging, formjacking and digital skimming. Magecart is also protected. - by extending the web security beyond the browser to the server.