📟 monitoring

Checkly costs $35/mo.
These cost $0.

13 free alternatives to Checkly, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.

⚡ Quick Verdict · 2027 Guide

The top-rated free, open-source replacement for Checkly is Uptime Kuma (MIT Open Source). Across this category, 13 self-hostable tools are available (including Uptime Kuma and Cachet). Switching a 5-person team saves up to $2,100/year compared to Checkly's $35/mo subscription.

The catch: It is excellent for checks from your own server, but has no built-in worldwide probe fleet or polished synthetic transaction recorder.

See the 13 picks ↓

Checkly vs Free Alternatives

Quick side-by-side comparison · $0/mo vs $35/mo

Alternative	Type	License	Where It Runs	Stars	Head-to-Head
Uptime Kuma	open source	MIT	Self-host	★ 93.3k	Checkly vs Uptime Kuma →
Cachet	open source	Open Source	Self-host	★ 15.3k	Checkly vs Cachet →
Checkmate	open source	Open Source	Self-host	★ 11k	Checkly vs Checkmate →
Gatus	open source	Apache-2.0	Self-host	★ 12.5k	Checkly vs Gatus →
OpenStatus	open source	Open Source	Self-host	★ 9.2k	Checkly vs OpenStatus →
Healthchecks	open source	Open Source	Self-host	★ 10.5k	Checkly vs Healthchecks →
OneUptime	open source	Apache-2.0	Self-host	★ 7.8k	Checkly vs OneUptime →
Kener	open source	Open Source	Self-host	★ 5.2k	Checkly vs Kener →
Peekaping	open source	Open Source	Self-host	★ 1.2k	Checkly vs Peekaping →
Statusnook	open source	Open Source	Self-host	★ 989	Checkly vs Statusnook →
EasyMonitor	open source	Open Source	Self-host	★ 85	Checkly vs EasyMonitor →
Uptimepage	open source	Open Source	Self-host	★ 53	Checkly vs Uptimepage →
StatusScout	open source	Open Source	Self-host	★ 16	Checkly vs StatusScout →

The picks

13 open source · ranked by fit

01
Uptime Kuma
open sourceMITSelf-host
93.3knov 2026
Monitors websites, APIs, and services with real-time alerts, a status page, and support for dozens of notification channels. Self-hosted and Docker-friendly.
The catch vs Checkly
It is excellent for checks from your own server, but has no built-in worldwide probe fleet or polished synthetic transaction recorder.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Docker Compose with a persistent `/app/data` volume, or a manual Node.js plus PM2 install
setup
It still needs an always-on host, Docker volume discipline, and outbound notification credentials; network filesystems are explicitly unsupported for the data directory.
your data
Monitor configuration, users, status pages, certificates, and history live in the application database under the mounted `/app/data` directory.
checked
2026-11-07
Visit uptime.kuma.pet ↗Source Compare vs Checkly →also replaces 8 other apps →
02
Cachet
open sourceOpen SourceSelf-host
15.3knov 2026
Open-source status page platform that helps organizations communicate system status and incidents effectively with customizable components and metrics tracking
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/cachethq/cachet or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit cachethq.io ↗Source Compare vs Checkly →also replaces 5 other apps →
03
Checkmate
open sourceOpen SourceSelf-host
11knov 2026
Monitor servers, websites, Docker containers, and infrastructure with real-time insights, instant alerts, and powerful analytics. Self-hosted solution.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/bluewave-labs/checkmate or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit checkmate.so ↗Source Compare vs Checkly →also replaces 5 other apps →
04
Gatus
open sourceApache-2.0Self-host
12.5knov 2026
A highly customizable monitoring solution that provides automated status pages, extensive alerting options, and detailed testing capabilities for your services and infrastructure
The catch vs Checkly
It is configuration-driven and normally probes from one place, so Pingdom's global probe network and recorder-style transaction checks are the major losses.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Run one binary or Docker container and supply a YAML configuration; Helm is available
setup
The first hurdle is writing YAML for endpoints, conditions, alerts, and secrets; without configuring a database, history disappears on restart.
your data
Monitor definitions live in YAML; results are in memory by default or persist in SQLite or PostgreSQL when storage is configured.
checked
2026-11-07
Visit gatus.io ↗Source Compare vs Checkly →also replaces 9 other apps →
05
OpenStatus
open sourceOpen SourceSelf-host
9.2knov 2026
Open-source status page and uptime monitor that tracks endpoints from 28 global regions, communicates incidents, and helps satisfy SOC 2 audit requirements.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/openstatushq/openstatus or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit openstatus.dev ↗Source Compare vs Checkly →also replaces 7 other apps →
06
Healthchecks
open sourceOpen SourceSelf-host
10.5knov 2026
Monitors cron jobs, background workers, and scheduled tasks by expecting periodic HTTP pings and alerting you when they stop arriving on time.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/healthchecks/healthchecks or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit healthchecks.io ↗Source Compare vs Checkly →also replaces 2 other apps →
07
OneUptime
open sourceApache-2.0Self-host
7.8knov 2026
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
The catch vs Checkly
It covers many adjacent jobs, but its self-hosted stack is far heavier to run and its integration depth and polish trail Datadog's mature managed platform.
Install, platforms & data +
platforms
webself-hostedself-host, real ops
install
Hosted signup, or the release-branch Docker Compose stack; Helm is the production path
setup
The recommended self-hosted footprint is large and production requires secrets, TLS, backups, database care, and frequent upgrades rather than a single lightweight monitor.
engines
Its AI features can connect to OpenAI, Azure OpenAI, Anthropic, Groq, Mistral, Ollama, and OpenAI-compatible servers such as vLLM, LocalAI, or LM Studio.
your data
Self-hosted telemetry is stored in ClickHouse, application state and configuration in PostgreSQL, and cache, queues, and sessions in Redis.
checked
2026-11-07
Visit oneuptime.com ↗Source Compare vs Checkly →also replaces 15 other apps →
08
Kener
open sourceOpen SourceSelf-host
5.2knov 2026
Free, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify subscribers instantly.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/rajnandan1/kener or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit kener.ing ↗Source Compare vs Checkly →also replaces 6 other apps →
09
Peekaping
open sourceOpen SourceSelf-host
1.2knov 2026
Open-source uptime monitoring solution with real-time alerts, status pages, and comprehensive checks for websites, APIs, databases, and services.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/0xfurai/peekaping or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit peekaping.com ↗Source Compare vs Checkly →also replaces 5 other apps →
10
Statusnook
open sourceOpen SourceSelf-host
989nov 2026
A powerful open-source status page system for real-time incident tracking, maintenance updates, and transparent communication with users.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/goksan/statusnook or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit statusnook.com ↗Source Compare vs Checkly →also replaces 5 other apps →
11
EasyMonitor
open sourceOpen SourceSelf-host
85nov 2026
Deploy your own uptime and performance monitoring with HTTP/ICMP checks, multi-region probes, and custom status pages. MIT licensed, runs on minimal hardware.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/easymonitordev/easymonitor or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit easymonitor.com ↗Source Compare vs Checkly →also replaces 5 other apps →
12
Uptimepage
open sourceOpen SourceSelf-host
53nov 2026
Hosted uptime monitoring with multi-region checks, eight monitor types, on-call rotations, escalation policies, and public status pages for SaaS teams and agencies.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/uptimepage/uptimepage or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit uptimepage.dev ↗Source Compare vs Checkly →also replaces 6 other apps →
13
StatusScout
open sourceOpen SourceSelf-host
16nov 2026
Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
The catch vs Checkly
Requires self-hosting setup, updates, and server maintenance compared to managed Checkly.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/vincenius/statusscout or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit statusscout.dev ↗Source Compare vs Checkly →also replaces 6 other apps →

Checkly Head-to-Head Comparisons (2027)

Side-by-side trade-off breakdowns · 13 free alternatives

Checkly vs Uptime KumaMIT · Self-host →

Checkly vs CachetOpen Source · Self-host →

Checkly vs CheckmateOpen Source · Self-host →

Checkly vs GatusApache-2.0 · Self-host →

Checkly vs OpenStatusOpen Source · Self-host →

Checkly vs HealthchecksOpen Source · Self-host →

Checkly vs OneUptimeApache-2.0 · Self-host →

Checkly vs KenerOpen Source · Self-host →

Checkly vs PeekapingOpen Source · Self-host →

Checkly vs StatusnookOpen Source · Self-host →

Checkly vs EasyMonitorOpen Source · Self-host →

Checkly vs UptimepageOpen Source · Self-host →

Checkly vs StatusScoutOpen Source · Self-host →

Frequently Asked Questions

Direct answers · Checkly open-source replacements

What is the best free alternative to Checkly?+

The top free alternative to Checkly is Uptime Kuma (open source, MIT). Monitors websites, APIs, and services with real-time alerts, a status page, and support for dozens of notification channels. Self-hosted and Docker-friendly. Other popular Checkly replacements include Cachet, Checkmate, Gatus.

Can I self-host a free replacement for Checkly?+

Yes. Of the 13 free alternatives to Checkly, 13 can be self-hosted on your own server or local machine: Uptime Kuma (MIT), Cachet (Open Source), Checkmate (Open Source), Gatus (Apache-2.0), OpenStatus (Open Source), Healthchecks (Open Source), OneUptime (Apache-2.0), Kener (Open Source), Peekaping (Open Source), Statusnook (Open Source), EasyMonitor (Open Source), Uptimepage (Open Source), StatusScout (Open Source).

How much does switching from Checkly to a free alternative save?+

Checkly starts at $35/month per seat ($420/year). Switching a 5-person team to a free alternative like Uptime Kuma saves $2,100 per year in software subscription fees.

Should I vibe-code or build my own Checkly clone from scratch?+

Our build verdict for Checkly is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Checkly or rebuilding it from scratch, deploy one of the 13 battle-tested open-source alternatives like Uptime Kuma.

What is the catch when switching from Checkly to Uptime Kuma?+

It is excellent for checks from your own server, but has no built-in worldwide probe fleet or polished synthetic transaction recorder.