10 Best Open-Source Uptime Monitoring Tools Compared

Open-source uptime monitoring is the practice of deploying self-hosted, vendor-neutral software to continuously probe external endpoints (HTTP, TCP, DNS, and SSL) for availability, latency, and functional correctness. Unlike internal APM or log aggregation platforms, synthetic probers actively answer whether a service is reachable and behaving correctly from the outside world while powering public status pages for incident communication.

Commercial SaaS tools (UptimeRobot, Pingdom, Better Stack) make that easy — until probe volume, custom status-page branding, data privacy, or budget constraints push you toward open source.

This guide evaluates and compares the 10 leading open-source uptime monitoring tools that offer active synthetic probing, alerting, and status communication:

1. Uptime Kuma — The gold standard for UI-first homelab & SMB monitoring.
2. Gatus — Ultra-lightweight Go single binary with YAML condition expressions.
3. OpenStatus — Modern Monitoring-as-Code with Terraform, CLI, MCP agents, and Next.js status pages.
4. OneUptime — Complete reliability suite replacing Pingdom, Statuspage, PagerDuty, and APM in one deploy.
5. Kener — Sleek SvelteKit status page with monitors-as-code and live SVG badges.
6. Upptime — Zero-infrastructure, 100% serverless monitor running on GitHub Actions & Pages.
7. UptimeFlare — Serverless edge prober running across 310+ cities on Cloudflare Workers & Pages.
8. Vigil — High-performance Rust microservices status page and prober.
9. Apache HertzBeat — Top-level Apache project for agentless multi-protocol synthetic & infrastructure monitoring.
10. Statping-ng — Classic self-hosted status board and prober in a single Go binary.

For full three-signal observability platforms (logs + metrics + traces), see our open-source observability platform comparison. For commercial pricing context, see the paid observability platforms pricing guide.

TL;DR — Quick Recommendations

Use Case	Best Fit	Runner-Up	Why
Homelab / fastest point-and-click UI	Uptime Kuma	Statping-ng	Single Docker container, 90+ notification channels, polished status pages
GitOps / declarative YAML checks	Gatus	Upptime	Single Go binary, condition DSL over latency/body/certs, native Prometheus metrics
Monitoring-as-Code + Terraform / AI MCP	OpenStatus	Gatus	Native Terraform provider, typed API, and Model Context Protocol (MCP) server for agents
All-in-one: Uptime + Status + On-Call + OTel	OneUptime	OpenStatus	Replaces UptimeRobot + PagerDuty + Statuspage in a single unified deployment
Modern SvelteKit status page + live badges	Kener	OpenStatus	Sleek design, monitors-as-code (JSON/YAML), embeddable live SVG badges
Zero-infrastructure / 100% serverless on GitHub	Upptime	UptimeFlare	Runs entirely on GitHub Actions cron schedules; commits data to Git and publishes to Pages
Global multi-region edge probing ($0 servers)	UptimeFlare	Upptime	Probes from 310+ Cloudflare edge cities; runs on Cloudflare Workers + KV free tier
Ultra-lightweight microservices prober (<25MB RAM)	Vigil	Gatus	Native Rust binary, microservice push agents, ultra-low resource footprint
Enterprise agentless & multi-protocol checks	Apache HertzBeat	OneUptime	HTTP, JMX, SNMP, JDBC, SSH probers with AI diagnostics and clustering

Jump to When to Use What for the detailed decision guide, or review the Comparison Matrices below.

Approach & Scope Demarcation

Selection Criteria

To qualify for this comparison, tools had to meet four strict criteria:

1. Open Source: Public source code repository under a recognized OSI or permissive open-source license.
2. Active Synthetic Engine: Must contain an active prober daemon or scheduled engine that tests external endpoints (HTTP, TCP, DNS, etc.).
3. Status Communication Surface: Must provide a built-in status page or dashboard for incident transparency.
4. Deployable Without Mandatory Paid Cloud: Fully usable self-hosted or via free-tier serverless/Git automation platforms.

What This Guide Is NOT: Exclusions & NMS Demarcation

To keep the comparison practically actionable, we deliberately exclude three adjacent categories:

1. Traditional Network Management Systems (NMS) — Zabbix, Nagios Core, LibreNMS, Icinga 2:
   These are enterprise infrastructure monitoring suites focused on SNMP polling, switch port health, server CPU/memory agents, and hardware sensors. While they can ping URLs, they lack developer-friendly public status pages, subscriber email/SMS workflows, modern UI branding, and GitOps workflows.
2. Headless Metric Exporters — Prometheus Blackbox Exporter:
   Blackbox Exporter is the industry standard for probing HTTP, DNS, TCP, ICMP, and gRPC endpoints in Kubernetes. However, it is an exporter that generates Prometheus metrics, not a status communication product. (See FAQ for how to use it alongside status tools).
3. Inverted / Cron Heartbeat Monitors — Healthchecks:
   Healthchecks is a dead-man’s snitch: your backup scripts and background cron jobs ping it. If a job goes silent, it alerts. This is the inverse of active outward synthetic probing.
4. Static Status Page Generators without Probers — Cachet, cState:
   These provide incident communication frontends but require third-party scripts or manual API calls to report uptime.

Legend

Symbol	Meaning
✅	Fully supported and documented out of the box
◐	Partial support, experimental, or requires extra scripting/plugins
⭐	Standout strength or benchmark implementation
—	Not supported or out of scope
EE	Enterprise edition / commercial boundary required

Candidate Tools Evaluated

Tool	Primary Language / Stack	Storage / State	License	GitHub Stars (Sep 2026)	MCP / AI Agents	Primary Persona
Uptime Kuma	Node.js + Vue.js	SQLite (local volume)	MIT	⭐ ~92.0k	◐ Community	Homelabber, SMB, UI-first DevOps
Gatus	Go	Memory / SQLite / PostgreSQL	Apache 2.0	⭐ ~12.2k	—	SRE, Kubernetes / GitOps Engineer
OpenStatus	TypeScript (Next.js)	Turso (libSQL) + Tinybird	AGPL-3.0	⭐ ~9.2k	⭐ Official	Modern Web Dev, Platform Engineer
OneUptime	TypeScript	PostgreSQL + ClickHouse	Apache 2.0 (+ EE)	⭐ ~7.7k	⭐ Official	SRE Team, Reliability Org
Kener	TypeScript (SvelteKit + Node.js)	SQLite / JSON configs	MIT	⭐ ~4.2k	—	Developer, Product Team
Upptime	TypeScript / GitHub Actions	Git Repository / GitHub Issues	MIT	⭐ ~16.5k	◐ Copilot Actions	Indie Hacker, Open Source Maintainer
UptimeFlare	TypeScript / Cloudflare Workers	Cloudflare KV	MIT	⭐ ~3.6k	—	Jamstack Dev, Zero-Budget Operator
Vigil	Rust	In-memory + local config	MPL-2.0	⭐ ~4.7k	—	Microservice Architect, Systems Dev
Apache HertzBeat	Java (Spring Boot) + Vue	H2 / MySQL / VictoriaMetrics	Apache 2.0	⭐ ~5.6k	⭐ Official	Enterprise IT, Multi-Protocol Ops
Statping-ng	Go + Vue.js	SQLite / MySQL / PostgreSQL	GPL-3.0	⭐ ~2.2k	—	Self-Host Enthusiast, Classic Ops

Architectural Archetypes

Before evaluating features, it is critical to understand the four architectural patterns that govern open-source uptime tools:

flowchart TD
    subgraph S1["1. UI-First Containers"]
        UK["Uptime Kuma<br/>(Node + SQLite)"]
        SP["Statping-ng<br/>(Go + SQLite/PG)"]
    end

    subgraph S2["2. Code-First & GitOps Engines"]
        GA["Gatus<br/>(Go Single Binary)"]
        KN["Kener<br/>(SvelteKit + Monitors-as-Code)"]
        VG["Vigil<br/>(Rust Microservices)"]
    end

    subgraph S3["3. Zero-Server / Edge Probers"]
        UP["Upptime<br/>(GitHub Actions + Pages)"]
        UF["UptimeFlare<br/>(Cloudflare Workers + KV)"]
    end

    subgraph S4["4. Full Reliability & Enterprise Suites"]
        OS["OpenStatus<br/>(Next.js + Turso + IaC/MCP)"]
        OU["OneUptime<br/>(PG + ClickHouse + On-Call)"]
        HB["Apache HertzBeat<br/>(Java Agentless + AI)"]
    end

Archetype	Tools	How It Operates	Best Fit
UI-First Container	Uptime Kuma, Statping-ng	Single container with embedded DB; configured via interactive web GUI	Homelabs, small business apps, operators who prefer visual setup
Code-First Engine	Gatus, Kener, Vigil	Single binary or lightweight runtime reading YAML/JSON configurations	GitOps pipelines, microservices, developers who version checks in Git
Zero-Server Edge	Upptime, UptimeFlare	Runs completely on third-party serverless infrastructure (GitHub or Cloudflare)	$0 budget, zero server maintenance, indie projects, open-source repos
Reliability Suite	OpenStatus, OneUptime, HertzBeat	Multi-service platform integrating monitoring, incidents, on-call, or telemetry	Engineering teams replacing multi-tool commercial SaaS stacks

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Core Monitoring Capability Matrix

Capability	Uptime Kuma	Gatus	OpenStatus	OneUptime	Kener	Upptime	UptimeFlare	Vigil	HertzBeat	Statping-ng
HTTP(S) GET/POST	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
TCP Port Probes	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
DNS Resolution	✅	✅	✅	✅	✅	◐ script	—	—	✅	◐
ICMP / Ping	✅	✅	◐	✅	◐	◐ TCP ping	—	✅	✅	✅
Keyword / Body Assert	✅ keyword	⭐ condition DSL	✅	✅	✅ regex	✅ response	◐ text	◐ text	⭐ DSL	✅
JSON Path / Query	✅ JSON query	⭐ [BODY].path	✅	✅	✅	◐ jq script	◐	—	⭐ JSON path	◐
SSL / TLS Expiry	✅	⭐ conditions	✅	✅	✅	✅	◐	✅	✅	✅
gRPC & WebSockets	◐ WS only	⭐ gRPC + WS	—	◐ WS only	—	—	—	—	◐ gRPC	◐ gRPC
Advanced Protocols (SSH/SNMP/JDBC)	—	⭐ SSH/STARTTLS	—	—	—	—	—	—	⭐ JMX/SNMP/JDBC	—
Docker Container Health	✅	—	—	✅ agent	—	—	—	—	✅ K8s/Docker	—
Multi-Step Synthetic Flows	◐	⭐ suites (alpha)	✅ flows	✅ workflows	◐ chained	◐ Actions	—	—	◐	—
Multi-Region Probes	◐ multi-instance	◐ remote push	⭐ cloud fleet / ◐ private	⭐ global	◐ workers	◐ runners	⭐ 310+ edge cities	◐ reporters	◐ cluster	—
Minimum Interval	20s	10s–60s	Configurable	Configurable	1s–60s	5 minutes	1–2 minutes	5s–30s	10s	30s
Prometheus Metrics Export	◐ scrape	⭐ native /metrics	◐	✅ OTel stack	◐ API	—	—	◐ prometheus	⭐ native	✅ /metrics

Key Insights:

• Best Assertion Power: Gatus and Apache HertzBeat provide expressive condition languages evaluating status code, response time, SSL expiration, and nested JSON payloads simultaneously.
• Widest Protocol Coverage: Apache HertzBeat excels beyond web endpoints, natively checking databases (MySQL/PostgreSQL), JMX, SNMP, and SSH.
• Geographic Edge Probing: UptimeFlare automatically leverages Cloudflare’s network of 310+ cities, making it an extraordinary free synthetic checker for global latency.

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Status Page & Incident Communication Matrix

Capability	Uptime Kuma	Gatus	OpenStatus	OneUptime	Kener	Upptime	UptimeFlare	Vigil	HertzBeat	Statping-ng
Public Status Page	⭐ Polished	✅ Functional	⭐ Modern	⭐ Enterprise	⭐ SvelteKit	⭐ Pages	✅ Interactive	✅ Responsive	◐ Dashboard	✅ Classic
Custom Domain Mapping	✅	◐ proxy	✅	✅	✅	✅ CNAME	✅ Cloudflare	◐ proxy	◐ proxy	✅
Password / Private Page	✅	◐ basic auth	✅	✅	✅ session	— public	◐ CF access	◐ basic auth	✅ RBAC	✅
Incident Timeline Posts	✅ Manual	—	✅ Rich text	⭐ Full lifecycle	✅ UI / API	⭐ GitHub Issues	✅ Issues	✅ Events	◐ Logs	✅ Incidents
Auto-Open on Outage	◐	—	✅	⭐ Auto-declare	✅	⭐ Auto Issue	◐	◐	◐	✅
Subscriber Email / SMS	◐ RSS	—	✅ Email + RSS	⭐ Email + SMS	◐ RSS/Webhooks	◐ Watch/RSS	◐ Webhooks	◐ Webhooks	◐ Webhooks	◐ Email
Maintenance Windows	✅	✅ per-endpoint	✅	✅	✅	◐ workflow pause	◐	◐	✅	◐
Embeddable Status Badges	◐	✅	✅	✅	⭐ Live SVG/PNG	⭐ shields.io	◐	✅	◐	✅
Design Customization	Light/Dark CSS	Minimal CSS	⭐ Tailwind theming	⭐ Full branding	⭐ Svelte themes	Markdown/CSS	Custom CSS	Clean HTML	Enterprise UI	Custom SCSS

Key Insights:

• Most Modern Public Facing UI: OpenStatus and Kener produce status pages that look and feel like premium modern SaaS products.
• Most Automated Incident Workflow: Upptime uses GitHub Issues natively: an outage opens an issue with response time logs; resolution automatically closes the issue and tallies downtime.
• Enterprise Incident Communications: OneUptime provides end-to-end subscriber fan-out across Email, SMS, webhooks, and private team dashboards.

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Alerting & Reliability Operations Matrix

Capability	Uptime Kuma	Gatus	OpenStatus	OneUptime	Kener	Upptime	UptimeFlare	Vigil	HertzBeat	Statping-ng
Notification Channels	⭐ 90+	✅ 40+	✅ 15+	⭐ SMS/Call/Slack	✅ Slack/Discord/Email	✅ 10+	✅ 10+ Webhooks	✅ Slack/Twilio/Telegram	⭐ 20+ channels	✅ 10+
Anti-Flap / Thresholds	✅	⭐ Failure/Success counts	✅	✅	✅	◐ Consecutive runs	◐	✅	⭐ Smart threshold	✅
On-Call Schedules	—	—	◐	⭐ Native	—	—	—	—	—	—
Escalation Policies	—	—	◐	⭐ Native	—	—	—	—	◐	—
Automated Remediation	—	—	◐	⭐ Workflows	—	⭐ GitHub Actions	—	—	◐ Hooks	—
AI / Agent Integrations	◐ Community MCP	—	⭐ Native MCP	⭐ Native MCP + Auto-fix	—	◐ Copilot Actions	—	—	⭐ Native MCP + AI diag	—

Key Insights:

• Notification Variety King: Uptime Kuma supports over 90 notification services (Gotify, Telegram, Pushover, Discord, Matrix, Signal, Ntfy).
• PagerDuty Replacement: OneUptime is the only candidate featuring genuine on-call rotation schedules, escalation policies, and SMS/phone alerting in the same package.
• AI Agent Native: OpenStatus, OneUptime, and Apache HertzBeat provide native Model Context Protocol (MCP) servers allowing autonomous AI coding agents to query status, investigate errors, and update status pages programmatically.

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Configuration, IaC & Developer Experience Matrix

Capability	Uptime Kuma	Gatus	OpenStatus	OneUptime	Kener	Upptime	UptimeFlare	Vigil	HertzBeat	Statping-ng
Configuration Model	Web UI → SQLite	⭐ YAML files	⭐ YAML/Terraform/CLI	UI + API	⭐ JSON/YAML	⭐ .upptimerc.yml	JavaScript/Worker	Config file (.cfg)	Web UI + YAML	Web UI + YAML
Git-Reviewable (GitOps)	◐ export	⭐ Native Git	⭐ Native Git	◐	⭐ Native Git	⭐ 100% Git-native	◐ Git commit	⭐ Git-native	◐	◐
Hot Reload Config	Live UI	✅ Live reload	✅ CI sync	✅ Live UI	✅ Live reload	✅ Commit trigger	✅ Worker deploy	✅ Service reload	✅	◐
Terraform Provider	—	—	⭐ Official	◐ Community	—	—	—	—	—	—
Model Context Protocol (MCP)	◐ Community bridge	—	⭐ Official (/mcp)	⭐ Official (/MCP)	—	—	—	—	⭐ Official (Native)	—
Typed REST/GraphQL API	✅	✅	⭐ Typed API	⭐ Comprehensive	✅ REST API	◐ GitHub API	◐ Cloudflare API	✅ REST API	⭐ OpenAPI	✅ REST API
Learning Curve	Lowest	Low	Medium	High	Low	Lowest	Low	Low	Medium	Low

Key Insights:

• Model Context Protocol (MCP) Readiness: OpenStatus (https://api.openstatus.dev/mcp), OneUptime (/MCP), and Apache HertzBeat offer official, first-party MCP servers designed for AI agents (Claude Desktop, Cursor, Antigravity) to query uptime telemetry and manage monitors safely. Uptime Kuma is supported via popular community bridges (@davidfuchs/mcp-uptime-kuma), while Gatus, Kener, Upptime, and Vigil rely on standard Git or REST automation.
• Infrastructure as Code: OpenStatus is the clear winner for teams managing monitors alongside cloud infrastructure via its official Terraform provider and CLI.

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Architecture & Operational Complexity Matrix

What must you configure, patch, and monitor in production?

Dimension	Uptime Kuma	Gatus	OpenStatus	OneUptime	Kener	Upptime	UptimeFlare	Vigil	HertzBeat	Statping-ng
Runtime Stack	Node.js + Vue	Go Binary	Next.js + Bun/Node	Node / TS Services	Node.js / SvelteKit	GitHub Actions	CF Workers	Rust Binary	Java / Spring Boot	Go Binary
External Database	None (SQLite)	None (or PG)	Turso / Tinybird	PG + ClickHouse	None (SQLite)	None (Git)	Cloudflare KV	None (RAM)	H2 (or PG/MySQL)	None (or PG/MySQL)
Local RAM Footprint	~150–300 MB	⭐ ~15–30 MB	~250–500 MB	2–4 GB+	~50–150 MB	0 MB (Serverless)	0 MB (Serverless)	⭐ ~10–25 MB	~500 MB – 1 GB	~50–100 MB
High Availability (HA)	— Single writer	◐ Remote push	✅ Distributed	✅ K8s Helm	◐ Multi-worker	⭐ GitHub infra	⭐ Cloudflare edge	◐ Reporters	✅ Cluster mode	◐
Server Required?	Yes (VPS)	Yes (VPS/K8s)	Yes (or Cloud)	Yes (Cluster/VPS)	Yes (VPS)	No	No	Yes (VPS/Binary)	Yes (VPS/Cluster)	Yes (VPS)

Key Insights:

• Zero Server Overhead: Upptime and UptimeFlare run completely serverless. You operate no Linux servers, run no Docker daemons, and manage no database migrations.
• Lightest Self-Hosted Footprint: Vigil (Rust) and Gatus (Go) consume less than 30MB of RAM, making them ideal sidecars on tiny VPSs or embedded devices.
• Heaviest Infrastructure: OneUptime requires planning for a production platform (PostgreSQL, ClickHouse, Redis, background workers).

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Licensing / “Actually Free” Matrix

How much uptime functionality can you run without commercial enterprise boundaries?

Tool	License	Open Source Integrity	Watch-Outs / Commercial Limits
Uptime Kuma	MIT	100% Free	Fully free; single maintainer project bus-factor
Gatus	Apache 2.0	100% Free	Fully free core binary; optional paid Gatus.io cloud
OpenStatus	AGPL-3.0	Self-Hostable	AGPL obligations if reselling as a service; cloud tier for hosted probers
OneUptime	Apache 2.0 (+ EE)	Community Edition Free	Advanced enterprise features (SAML/SCIM, audit logs) reside in ee/ directory
Kener	MIT	100% Free	Permissive open source; free for commercial use
Upptime	MIT	100% Free	Free; subject to GitHub Actions runner minutes (2,000 min/mo private; unlimited public)
UptimeFlare	MIT	100% Free	Free; subject to Cloudflare Workers free quotas (100k requests/day)
Vigil	MPL-2.0	100% Free	Free for internal and commercial deployments
Apache HertzBeat	Apache 2.0	100% Free	Top-level Apache Foundation governance
Statping-ng	GPL-3.0	100% Free	Open source community fork; slow commit cadence

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When to Use What

                     Where do you want your monitors to run?
                                     │
           ┌─────────────────────────┴────────────────────────┐
           ▼                                                  ▼
    [ No Servers / $0 ]                                [ Self-Hosted / VPS ]
           │                                                  │
   ┌───────┴───────┐                                  ┌───────┴───────────────────┐
   ▼               ▼                                  ▼                           ▼
[ GitHub ]   [ Cloudflare ]                    [ How do you configure? ]   [ Full Reliability Suite ]
   │               │                                  │                           │
Upptime       UptimeFlare                     ┌───────┴───────┐               OneUptime
                                              ▼               ▼
                                         [ Web GUI ]     [ Git / Code ]
                                              │               │
                                        Uptime Kuma      ┌────┴────────────────┐
                                                         ▼                     ▼
                                                   [ Go / Rust ]       [ TypeScript / IaC ]
                                                         │                     │
                                                   Gatus / Vigil       OpenStatus / Kener

Detailed Decision Guide

• Choose Uptime Kuma if: You want a point-and-click UI that runs in one Docker container and can ping almost anything, sending alerts to Telegram, Discord, or Gotify with zero YAML editing.
• Choose Gatus if: You want your monitors checked into Git alongside your Kubernetes manifests, evaluated with rich conditional assertions (latency, JSON body, certs), and exposed as native Prometheus metrics.
• Choose OpenStatus if: You treat monitoring as code via Terraform, want an AI agent (via MCP) to manage your status endpoints, and need a gorgeous customer-facing status page.
• Choose OneUptime if: You want to consolidate UptimeRobot, Statuspage.io, PagerDuty, and OpenTelemetry APM into a single self-hosted reliability platform.
• Choose Kener if: You are building a developer product and want a beautiful, Tailwind-styled SvelteKit status page with live embeddable SVG badges and monitors declared in JSON/YAML.
• Choose Upptime if: You want a completely free, zero-server status page for an open-source project or indie app running 100% inside a GitHub repository.
• Choose UptimeFlare if: You want geo-distributed probing from 310+ cities without running multi-region servers, hosted entirely on Cloudflare’s free edge tier.
• Choose Vigil if: You run microservices and need an ultra-low-footprint Rust status server that uses less than 25MB of RAM.
• Choose Apache HertzBeat if: You need an enterprise-grade agentless prober that monitors databases, JMX, SNMP, and SSH alongside HTTP endpoints.

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Known Limitations & Gotchas

Tool	Key Limitation	Practical Impact
Uptime Kuma	SQLite single-node; config stored in DB; no native multi-region	Hard to scale across multiple probe locations; not pull-request friendly
Gatus	Status page is functional rather than marketing-grade	Great for internal team engineering boards; less suited for consumer SaaS branding
OpenStatus	Compose stack is heavier than Kuma/Gatus; AGPL licensing	Requires orchestrating multiple services (Next.js, Turso, Tinybird); legal review if reselling
OneUptime	Significant compute footprint (PostgreSQL + ClickHouse + workers)	Overkill if you only need simple HTTP checks; budget RAM like an APM tool
Kener	Smaller plugin community than Uptime Kuma	Focuses cleanly on core HTTP/TCP checks rather than niche IoT protocols
Upptime	5-minute minimum interval; dependent on GitHub Actions uptime	Cannot trigger sub-minute outage alerts; Actions queue delays can skew latency graphs
UptimeFlare	Bound to Cloudflare Workers execution limits	Subject to Cloudflare free tier quotas; advanced custom scripts require Worker adjustments
Vigil	Minimalist status interface; manual alerting configuration	Prioritizes raw speed and microservices over rich subscriber management workflows
Apache HertzBeat	Java/JVM memory baseline	Requires 500MB+ RAM; heavier initial setup than Go/Rust single binaries
Statping-ng	Community maintenance cadence has slowed	Evaluation needed before deploying in critical production environments

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FAQ

What is the best zero-cost, zero-maintenance uptime tool?

Upptime (GitHub Actions) or UptimeFlare (Cloudflare Workers). Both run entirely on free cloud tiers without managing a Linux server, Docker container, or database.

Which uptime monitoring tools support Model Context Protocol (MCP) for AI agents?

• OpenStatus provides an official, cloud/self-hosted MCP server (https://api.openstatus.dev/mcp) enabling LLM agents (Claude Desktop, Cursor, Antigravity) to inspect monitor latency, declare status incidents, and schedule maintenance with built-in audit logging and safety gates.
• OneUptime includes an official native MCP server in its repository (/MCP), allowing AI coding assistants to correlate alerts, inspect traces, and suggest postmortems.
• Apache HertzBeat features an official native MCP server for agentic metric querying and automated anomaly diagnosis.
• Uptime Kuma can be connected to AI agents using popular community MCP servers (@davidfuchs/mcp-uptime-kuma or PyPI uptime-kuma-mcp-server) via its Socket.IO API.
• Gatus, Kener, Upptime, UptimeFlare, and Vigil currently do not provide dedicated MCP servers; automation relies on Git commits, GitHub Actions, or REST APIs.

What is the difference between Gatus and Prometheus Blackbox Exporter?

Blackbox Exporter is a headless metric scraper: it probes endpoints and exposes numbers for Prometheus to scrape and Alertmanager to route. Gatus is a complete, self-contained application: it probes endpoints, evaluates condition expressions, displays its own status board, and fires alerts directly (while still optionally exporting Prometheus metrics).

Can I use Prometheus Blackbox Exporter with these tools?

Yes! Many high-scale engineering organizations run Prometheus Blackbox Exporter internally for microservice SLO alerts, and pair it with a public status tool like OpenStatus, Kener, or Uptime Kuma for external customer communication.

Uptime Kuma vs. Kener: Which should I pick?

Pick Uptime Kuma if you prioritize 90+ notification integrations, interactive UI configuration, and niche monitor types (Steam, Docker, DNS). Pick Kener if you prioritize modern web design (SvelteKit + Tailwind), monitors declared as code in Git, and live embeddable SVG status badges.

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Honorable Mentions & Specialized Alternatives

• Cachet (PHP/Laravel) — The veteran open-source status page system. A major v3 rewrite modernizes the platform for enterprise incident communication.
• cState (Hugo/Jamstack) — Ultra-fast, minimal static status page generator deployed to Netlify or GitHub Pages without server-side compute.
• Healthchecks (Python/Django) — The premier open-source “dead-man’s snitch” for monitoring cron jobs, backups, and scheduled tasks.
• Statusnook (Go/Docker) — 1-click deployable status page solution for lightweight infrastructure.

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How This Fits the Observability Series

🧭 The Complete Observability Guide & Comparison Series

• Unified Platforms: Open-Source Observability Platforms Compared
• Hands-On Testing: Benchmarking Open-Source Observability: Real Hardware & Ingestion Numbers
• Cost & Licensing Analysis: Paid Observability Platforms & Enterprise Pricing Comparison
• Deep-Dive Specialized Signal Guides:
  • Logging: Open-Source Log Management Tools Compared (Loki, VictoriaLogs, Parseable, CLP)
  • Metrics & TSDBs: Open-Source Metrics Tools & Time-Series DBs Compared
  • Distributed Tracing: Open-Source Distributed Tracing Tools Compared (Jaeger, Tempo, Zipkin)
  • Continuous Profiling: Open-Source Continuous Profiling Tools Compared (Pyroscope, Parca, Perforator)
  • Uptime & Status: 10 Best Open-Source Uptime Monitoring Tools Compared (This Guide)

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References

Official Projects & Repositories

• Uptime Kuma: Website · GitHub
• Gatus: Website · GitHub
• OpenStatus: Website · GitHub · Docs
• OneUptime: Website · GitHub · Docs
• Kener: Website · GitHub · Docs
• Upptime: Website · GitHub
• UptimeFlare: GitHub
• Vigil: GitHub
• Apache HertzBeat: Website · GitHub
• Statping-ng: GitHub
• Prometheus Blackbox Exporter: GitHub
• Healthchecks: Website · GitHub
• Cachet: Website · GitHub
• cState: GitHub

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Last verified: September 2026. Star counts, features, and licensing change — always check official repositories and docs before adopting.