Best Free Monitoring Tools in 2026

Reliable event infrastructure for webhooks and external event streams.

4.5/5 across G2 and Capterra · 2,271 ratings, Oct 2026

This platform provides robust event infrastructure designed to manage the full lifecycle of external events, from ingestion to delivery and observability. It ensures that every event, whether from third-party webhooks or outbound event streams, is received, processed, and monitored reliably at scale, offering complete visibility and control. It's built for engineering teams dealing with event-driven systems, offering features like built-in event queueing to handle traffic spikes and destination failures, automatic issue management with event replay capabilities, and flexible routing and transformation of events. The platform integrates seamlessly with any tech stack, supporting various backends and allowing declarative infrastructure definition through API or Terraform. The core value proposition is to eliminate the headaches associated with managing webhooks and external events, such as missed events, retries, and debugging. By providing a scalable, secure, and compliant solution, it allows developers to focus on building their applications rather than on the complexities of event infrastructure, ensuring peace of mind even with high volumes of event data.

Monitor your websites, APIs, and servers from multiple locations

4.6/5 across SourceForge, Trustpilot, G2 and more · 1,535 ratings, Sep 2026

UptimeRobot is an uptime monitoring service used by millions of accounts. You watch HTTP(S) pages and endpoints, keywords, ping, ports, cron jobs, APIs, UDP, SSL, domains, and DNS from multiple locations. When something breaks you get real-time alerts on web and mobile, and you can publish public status pages. The free plan includes 50 monitors. Paid Solo, Team, and Scale plans add faster check intervals, more monitors, seats, and status-page options. Annual billing is advertised at a discount off monthly.

Full-stack observability with 50+ monitoring capabilities

4.4/5 across G2 and Capterra · 783 ratings, Sep 2026

New Relic is a full-stack observability platform offering 50+ monitoring capabilities in one platform with usage-based pricing and 100 GB of free monthly data ingest.

Cloud monitoring, security, and AI investigations for DevOps

4.4/5 on G2 · 726 ratings, Aug 2026

Datadog is a cloud monitoring and security platform providing infrastructure monitoring, APM, log management, and AI-powered investigations for DevOps and security teams.

Free website uptime monitoring

4.6/5 on G2 · 993 ratings, Sep 2026

Freshping monitors website uptime for free. Check if your sites are up from multiple locations, get alerts when they're not-basic uptime monitoring without cost. The free tier monitors multiple sites. Alerts work reliably. Status pages are included. Anyone needing simple uptime monitoring without budget uses Freshping for free, reliable checks.

Free IT help desk and network monitor

4.3/5 across SourceForge, G2 and Capterra · 964 ratings, Sep 2026

Spiceworks provides free IT help desk software and network monitoring tools. Includes ticket management, inventory tracking, and a community of IT pros.

Datadog MCP Server bridges your Datadog observability platform with AI assistants through the Model Context Protocol.

4.4/5 on G2 · 699 ratings, May 2026

Datadog MCP Server bridges your Datadog observability platform with AI assistants through the Model Context Protocol. It gives LLMs like Claude structured access to metrics, logs, monitors, SLOs, service definitions, CI/CD pipelines, and team information, enabling natural language queries against your monitoring infrastructure. The server provides 12 core tools: listing and querying metrics with flexible aggregation and grouping, fetching service logs filtered by environment and time range, managing monitors and SLOs, retrieving service definitions with ownership metadata, listing CI pipelines with fingerprint extraction for Terraform, and viewing teams with member details. Each tool supports multiple output formats and filtering options. Available as an open-source npm package, the server connects to the Datadog API using your API and application keys. Datadog also offers official MCP Server documentation and LLM Observability features that trace MCP client calls with structured metadata about invoked tools, parameters, and responses. The server works with Claude Desktop, Claude Code, Cursor, and other MCP-compatible clients, making it straightforward to investigate incidents, analyze metrics, or review service health through conversational AI.

Self-hosted uptime monitoring with beautiful status pages

4.6/5 on G2 · 348 ratings, Jun 2026

Uptime Kuma monitors uptime with self-hosted simplicity. Beautiful status pages and monitoring-uptime awareness without SaaS. The self-hosting is free. The interface is polished. The features are complete. Users wanting self-hosted uptime monitoring use Uptime Kuma for free monitoring.

All-in-One Network Monitoring Software to stay ahead of IT infrastructure issues.

4.7/5 across G2 and Capterra · 372 ratings, Sep 2026

PRTG Network Monitor is a comprehensive and easy-to-use solution designed to monitor all systems, devices, traffic, and applications within an IT infrastructure. It provides world-class infrastructure monitoring functionality suitable for businesses of all sizes, from SMBs to large enterprises. PRTG helps users know what's up and what's not across their entire network, including databases, applications, cloud services, servers, and local area networks (LANs), utilizing various monitoring methods like SNMP. The software offers multiple user interfaces, including web, desktop, and mobile apps (iOS and Android), for flexible monitoring and management. Users can visualize their network with real-time maps and custom dashboards, and receive alerts and notifications via email, push, or HTTP requests when issues arise or thresholds are exceeded. PRTG is highly flexible and customizable, allowing users to extend its functionality with HTTP API or custom sensors, ensuring it fits diverse monitoring needs and budgets.

Unified observability for uptime, incidents, and logs

4.7/5 across Trustpilot and G2 · 344 ratings, Sep 2026

Better Stack combines uptime monitoring, incident management, and log management into one unified observability platform. Monitor websites, APIs, and servers with checks from multiple global locations. Get instant alerts via Slack, email, SMS, or phone calls when issues occur. Create beautiful public status pages to keep customers informed. Powerful log search helps you debug issues faster. From startups to enterprises, Better Stack scales with your needs.

Comprehensive IT monitoring platform for cloud, hybrid, and data center infrastructures.

4.7/5 across TrustRadius, G2 and Capterra · 344 ratings, Sep 2026

Checkmk is an IT monitoring platform designed to provide a complete view of an entire IT infrastructure, including public cloud providers, data centers, servers, networks, containers, and applications. It helps ITOps and DevOps teams run IT at peak performance by offering scalable, automated, and extensible monitoring capabilities. The platform features a High Performance Core that can scale to millions of monitored services with a small footprint, and includes a REST API for automation and host auto-registration. Checkmk offers an extensive library of over 2,000 vendor-maintained plug-ins for automated acquisition of health statuses and metrics. It provides out-of-the-box health assessment with pre-defined thresholds, time-series analysis, historical stats for forecasting, and granular alerting with integrations for third-party tools like ServiceNow and Jira. The platform also includes built-in and custom dashboards, Business Intelligence for process visibility, and custom self-healing actions, ensuring high availability and minimizing mean time to resolution.

Real-time error tracking and debugging

4.5/5 across G2 and Capterra · 435 ratings, Sep 2026

Rollbar monitors errors across stack and platforms. Error tracking with real-time alerting-catch problems before users report them. The grouping is intelligent. The real-time helps. The platform coverage is broad. Development teams monitoring production use Rollbar for comprehensive error tracking.

Application monitoring & error tracking

4.6/5 across G2 and Capterra · 297 ratings, Sep 2026

Sentry is an application monitoring platform providing error tracking, performance tracing, session replay, and uptime monitoring with event-based pricing for development teams of all sizes.

The universal, open-source observability solution for IT & OT infrastructure.

4.5/5 across G2 and Capterra · 320 ratings, Sep 2026

Zabbix is an enterprise-class, open-source observability solution designed to monitor virtually everything across IT and OT environments, including cloud services, networks, applications, databases, IoT devices, and more. It provides real-time insights and comprehensive visibility into infrastructure performance and health. This solution is ideal for businesses of all sizes, from small organizations to Fortune 500 companies and Managed Service Providers (MSPs), seeking a robust, scalable, and cost-effective monitoring platform. It caters to various industries such as banking, healthcare, aerospace, retail, and government, offering deep observability tailored to specific infrastructure needs. Zabbix helps organizations reduce downtime, improve reliability, and ensure consistent, high-quality services by providing flexible metric collection, problem detection, and advanced data visualization capabilities. Zabbix offers deployment flexibility, allowing users to deploy it on-premise for full control, utilize a fully-managed SaaS platform with Zabbix Cloud, or integrate it with third-party cloud environments like AWS, Azure, and Google Cloud. Its open-source nature ensures a low Total Cost of Ownership (TCO) with no license fees, while professional services and 24/7 support are available to ensure successful implementation and ongoing operations.

Observability and visualization platform

4.5/5 across G2 and Capterra · 275 ratings, Sep 2026

Grafana Cloud is an end-to-end observability platform built on open source standards, offering metrics, logs, traces, and visualization with usage-based pricing and flexible deployment options.