CATEGORY · 87 SERVICES
Compare included quotas, restrictions and official provider documentation.
New Relic Free: 100 GB data ingest/month, one full-platform user, unlimited basic users and 500 synthetic monitoring checks
No credit card needed for the perpetual Free edition. Default data retention is at least 8 days, varying by data type; data ingest stops when Free exceeds its monthly 100 GB allowance until next month or upgrade. Additional full-platform seats and ingest beyond 100 GB on paid editions are billable.
50 monitors with 5-minute checks and basic status pages
Free checks run every 5 minutes; 60-second checks and advanced alerts require a paid plan. Basic status pages and integrations have limitations. The Free plan is eligible for personal and commercial monitoring under UptimeRobot's Fair Use Policy.
Grafana Cloud Free: 10.000 active metric series/month and 50 GB logs ingested/month, with 14-day free retention
No credit card for ongoing Free, but metrics, logs, traces, profiles and synthetic tests have separate usage caps. Free retention is 14 days for metrics, logs and traces; Pro starts with a $19/month platform fee plus usage. Do not mistake self-hosted Grafana OSS for free managed ingestion.
One user; 5.000 errors/month; 50 replays and 1 uptime monitor
Developer is $0 for one user with error/tracing support; extra seats, event volume, profiling and paid integrations are separate. A temporary new-user promotion grants 5.000 Session Replays/month for the first 3 months; it does NOT expand the ongoing Free allowance.
Splunk Observability Cloud Free Edition: Agent Observability for agentic applications and supporting infrastructure, up to 15 hosts, without a fixed trial period
Free Edition concentrates on Agent Observability and up to 15 hosts, not every paid Observability Cloud module. Sign-up may require a request and platform eligibility; throttling and 30-day inactivity deactivation can apply. Commercial usage is restricted to internal business purposes; no service-bureau use.
500 GB data loading/month; 10 GB-hours query compute/month; 25 GB storage; 30-day retention
Axiom Personal is a permanent $0 hosted plan with NO credit card: 500 GB monthly data loading, 10 GB-hours query compute, 25 GB storage and 30-day retention, for individual developers and small projects. The separate Axiom Cloud plan adds a $25/month platform fee and larger allowances.
Ongoing $0 Hobby plan with 1 uptime monitor, 1 status page containing 3 components and minimum check interval of 10 minutes
New workspaces start on a separate 14-day Starter trial with no card, then return to ongoing Hobby if not upgraded. Hobby needs no credit card; 1-minute checks, additional monitors, larger status pages and advanced alerting options are paid. Do not classify the trial's 14-day expiry as expiry of the Hobby Free plan.
Ongoing Free: 30.000 app requests/month, 1 GB logging and 5-day retention
Existing Free users' grandfathered 50.000 requests/month allowance ends on October 31, 2026; afterward the Free tier is 30.000 requests/month. Crossing the request or logging limit locks the UI/API and disables notifications rather than generating overage invoices. A limited-term paid upgrade discount is not an ongoing free allowance.
20 million events/month; 100 million metrics data points/month; unlimited seats; unlimited querying
Free forever includes 2 triggers, distributed tracing and BubbleUp. Service Level Objectives require Pro; Service Map is Enterprise-only. Free event/metric ingestion is capped; commercial-use terms are not explicitly confirmed.
1M logs/crashes/events per month; 30-day retention; 1 app; 1 team member; email alerts; 3 AI RCA and 3 AI Session Summaries per month
Free is limited to 1 app, 1 team member, 30-day retention, and 3 AI RCA plus 3 AI Session Summaries per month. Provider pricing says it notifies users approaching the 1M monthly log/event quota and offers paid extra log capacity at $10 per 50M logs/month; it does not establish a guaranteed hard stop for Free. Confirm over-quota enforcement before relying on it for production cost protection; do not assume paid capacity is automatically purchased on Free.
55 monitors; 1-minute checks; 23 protocols; Telegram/email/webhook alerts plus 3 saved integrations; 5 status pages, 20 alerts, 5 API keys and 3 team members
Free forever without a card and explicitly permitted for commercial sites. Three consecutive failed checks are required by default before an alert (typically 2–3 minutes); service is provided as-is without uptime SLA or compensation.
Some providers keep an older free plan for qualifying accounts, while new signups may require a paid plan. Legacy eligibility is not a free trial.
Read eligibility policy ↗50 monitors; 3-minute checks (1 minute for first 10); 1 public status page
The Initiate is grandfathered to eligible early launch-cohort accounts: official pricing promises to honor launch terms permanently for early accounts, not unrestricted access to this $0 allowance for new signups. The separate 14-day trial applies to paid plans and does not make this ongoing legacy allowance a time-limited trial. Free retains logs for 3 days and includes one SteadyStack-branded public status page; official pricing explicitly permits commercial use and says no credit card is required to start.
10 uptime monitors; 1.000 Browser check runs and 10.000 API check runs/month; 1 user; 7-day raw data retention
Hobby is an ongoing $0 plan for personal projects and learning; no credit card required. Its 10.000 API and 1.000 Browser check runs per month are HARD capped: checks stop running once the relevant credits are exhausted, rather than generating paid overages. One user, 7-day raw result retention and 30-day aggregated retention. On paid Starter/Team, checks continue past prepaid allowances and overage rates apply.
Monitor up to 20 scheduled jobs with 100 log entries per job.
Check alerting and retention limitations before production use.
15 monitors, two-minute checks, email alerts and public status page.
No custom domain; limited subscribers and on-call members.
Five monitors, email and Slack alerts, and a basic status page.
No SMS alerts or premium integrations; intended for small projects.
Up to 1.000 events per month with unlimited projects and team members.
Personal projects; usage capped at 1.000 events per month.
Up to 2 public pages per organization; 100 subscribers, 25 components, 2 team members, 2 metrics; email/Slack/Teams notifications and rate-limited REST API
Free plan is only for public status pages; private pages and custom domains require paid plans. Credit-card requirement and commercial-use terms not independently confirmed.
5.000 error occurrences/month; 1.000 session replays/month; 30-day data retention; unlimited users and projects
14-day Advanced trial is separate from the ongoing Free tier; 0 AI credits on Free; processing stops at the monthly limit by default.
Self-hosted Uptime Kuma uptime monitoring and status pages for HTTP, TCP, ping, and other endpoint checks.
Monitoring runs on your own server, which needs connectivity and maintenance. Alert delivery may require third-party channels, and uptime checks depend on the host being available.
Self-hosted Beszel server monitoring dashboard with resource metrics collected by lightweight agents.
Requires your own server and agents; provide network access, storage, updates, and backups. It is not a managed monitoring or alerting service.
Self-hosted Glances system-monitoring software for CPU, memory, disks, network, and running processes.
Install and run on your own machines; collection scope and remote access depend on your setup. Secure exposed endpoints and arrange any long-term storage yourself.
Self-hosted Prometheus time-series metrics collection, scraping, querying, and alerting components.
No managed ingestion or storage quota is supplied; retention and capacity depend on your hardware. You operate exporters, monitoring, backups, and alert delivery.
Self-hosted Grafana OSS dashboards, visualizations, and alerting against supported data sources.
Grafana OSS does not include Grafana Cloud usage quotas or hosted metric storage. Data sources, authentication, hosting, and any paid integrations are separate.
Self-hosted Zabbix infrastructure monitoring with host agents, metrics, triggers, and alerting.
Requires your own monitoring server, database, agents, maintenance, and storage. Paid vendor support is separate from the community software.
25 HTTP/API uptime monitors with 5-minute checks; 7-day uptime history; email alerts and hosted status pages.
Free tier uses uptimesignal.io subdomains; custom domains, 1-minute checks and longer history require Pro. Official product pages disagree about whether Free includes one or unlimited status pages and about extra alert channels; verify in account before relying on them. Commercial use explicitly permitted.
Free Apache-2.0 single-node and cluster self-hosted metrics monitoring and time-series storage, with no vendor-enforced monthly ingestion, host, or seat quota.
Self-hosting requires your own compute, disk, backups, security and operations. Enterprise-only features, managed VictoriaMetrics Cloud and support are paid; Cloud's 30-day trial is not a free plan.
Apache-2.0 open-source distributed tracing backend with collector, query API and UI; self-hosted deployments have no vendor-imposed monthly trace, user or instance quota.
Provide and operate your own compute, storage backend, backups and security. Default all-in-one in-memory storage loses traces on restart and is for development; production needs durable storage and appropriate scaling. No hosted free tracing service or managed SLA is included.
Free Apache-2.0 open-source observability/APM platform with distributed tracing, metrics, logs, service maps, alerting, backend and web UI; no vendor software quotas for self-hosting.
Self-managed Java OAP server, agents, UI and persistent storage (such as BanyanDB) require infrastructure and maintenance. Quickstart/default storage is not a production deployment; production needs appropriate storage, security and clustering. No managed cloud allowance is included.
Apache-2.0 open-source self-hosted status page with configurable HTTP, TCP, ICMP and DNS health checks, conditions and alerting; no vendor-enforced endpoint or check quota for self-managed software.
Self-hosted edition requires your own server, configuration, persistent storage, alert integrations, TLS and backups. Third-party alert channels may charge; Gatus.io managed status pages are a separate hosted product. No managed uptime SLA is included.
GPLv3+ open-source real-time host and container monitoring Agent, free on unlimited self-hosted nodes; local dashboard available under NCUL1.
Run your own monitoring infrastructure. Netdata Cloud Community is a separate personal/non-commercial plan capped at 5 active connected nodes; Cloud Business and enterprise features are not included.
Apache-2.0 open-source telemetry pipeline to receive, process and export traces, metrics and logs without per-host or telemetry volume license charges.
Collector is a pipeline, not a hosted storage/search dashboard; provide your own telemetry backend, compute and network. Individual collector components have differing stability levels.
Free open-source community observability platform for logs, traces, metrics, dashboards and application performance monitoring on self-managed infrastructure.
Operate your own Docker/Kubernetes deployment and ClickHouse storage; advanced enterprise features and support are separate. SigNoz Cloud offers a 30-day trial, not an ongoing free cloud plan.
Apache-2.0 open-source OpenTelemetry collector for metrics, logs, traces and profiles; self-host collectors without a software usage quota.
Alloy is a telemetry collector, not a durable storage, query or dashboard backend; storage, processing, managed Grafana Cloud and infrastructure can cost extra.
Free AGPL-3.0 self-hosted log aggregation and query engine, with label-based indexing, compression and single-node or distributed deployment; no vendor-hosted ingestion allowance.
Provide and pay for compute, storage, networking and operations; log collection and visualization commonly require Grafana Alloy and Grafana. AGPL-3.0 network-use/source-sharing obligations apply to modified deployments.
AGPL-3.0-only open-source distributed tracing backend with OpenTelemetry ingestion and TraceQL queries; self-managed deployments have no vendor-imposed trace-count license quota.
You supply object storage, compute, networking and Grafana visualization; hosted Grafana Cloud plans are separate. AGPL-3.0 obligations apply; check Apache-2.0 exceptions in LICENSING.md.
Apache-2.0 open-source log, metric and trace collector/processor with configurable input, filter and output plugins, self-hosted without a software-imposed event or host quota.
Fluent Bit is a telemetry pipeline component, not a free hosted monitoring dashboard or long-term log store. You provide runtime resources and downstream storage/analytics; external log destinations may charge for ingestion and retention.
Free self-managed infrastructure and service monitoring with health checks, distributed monitoring, alerting and REST API; no software host-based fee.
Compute, storage and notification channels are your responsibility; Icinga 2 v2.16+ uses GPLv3+ and commercial support is separate.
MIT-licensed self-hosted real-time container log viewer for Docker, Docker Swarm, Kubernetes and Podman; free forever with no vendor-imposed log-viewing quota or account requirement.
Live log viewer, not a long-term log archive. Requires your own container host; Docker socket access is privileged and must be secured. Hosting and storage costs are separate.
Apache-2.0 open-source single-node and cluster log database with LogsQL search, binary/Docker releases and no vendor-set ingestion or retention quota in Community binaries.
Self-hosted storage, compute, backups and access protection are your responsibility. VictoriaMetrics Enterprise binaries, enterprise support and additional enterprise features require a separate paid license.
MIT-licensed open-source HyperDX observability platform with logs, traces, metrics, errors and session replay; self-host on ClickHouse infrastructure without a HyperDX software subscription or vendor-set event quota.
Self-hosting requires ClickHouse and other deployment components; server, storage and telemetry processing costs are not included. Managed HyperDX/ClickStack cloud plans and their free limits are separate. Review anonymized usage-data setting.
Free AGPL-3.0 OpenObserve open-source edition for self-hosted logs, metrics, traces, dashboards, alerts and OpenTelemetry ingestion; no vendor-hosted monthly ingestion allowance or software seat quota.
Bring your own compute, storage and object storage; infrastructure costs and AGPL-3.0 network-source obligations apply. SSO, enterprise RBAC, audit trails and some security features require the paid Enterprise edition. This is NOT the discontinued OpenObserve Cloud free tier.
Free self-hosted Coroot Community Edition for application/infrastructure observability with metrics, logs, traces, service maps and eBPF monitoring; no Community software license fee.
Requires self-managed Linux/Kubernetes/Docker infrastructure and storage; kernel/eBPF compatibility matters. Enterprise features, support and AI root-cause analysis require separate paid plans; Apache-2.0 license obligations apply.
AGPL-3.0 open-source self-hosted APM for OpenTelemetry traces, metrics and logs; no hosted service allowance or software usage quota.
Bring your own servers and storage; AGPL-3.0 network-service source-sharing obligations apply to modified deployments; vendor-hosted and enterprise features are separate.
Apache-2.0 agentless self-hosted monitoring and alerting for infrastructure, services, metrics and logs; no software license fee or hosted quota.
Requires own compute and storage for metrics/logs and any notification delivery costs; change the documented default admin password before exposing the service; managed hosting is not included.
Hosted $0 Free plan includes 1 public status page, 100 subscribers, unlimited manual monitors and basic incident management; no credit card required to sign up.
Active monitors are billed at $1/month each; SMS, calls, telemetry ingestion and advanced features may incur separate charges. No uptime SLA on Free. Distinct from free self-hosted Community Edition.
Apache-2.0 open-source continuous CPU and memory profiling with self-hosted Parca server, web UI and eBPF agent; no vendor-enforced profiling quota for the self-managed edition.
Requires your own compute, storage, network security, Kubernetes or Linux host setup, and operations. eBPF profiling needs compatible Linux kernel and permissions. Managed profiling, infrastructure, and optional third-party services may cost extra; not a free hosted cloud plan.
MIT-licensed self-hosted status pages with service monitoring, incidents, maintenance notices and public status communication; no vendor-enforced site or monitor quota for the open-source edition.
You must deploy and maintain the Node.js/Svelte application, database, Redis/cache where required, HTTPS, backups and monitoring. Email, SMS, infrastructure and third-party integrations may incur separate charges; no managed service SLA is included.
MIT-licensed uptime monitoring and public status page using your GitHub repository: scheduled endpoint checks, incident Issues, history commits and GitHub Pages; no Upptime subscription or dedicated monitoring server.
You must configure and maintain a GitHub repository and workflows. GitHub Actions minutes, API/rate limits, repository visibility and GitHub Pages eligibility depend on your GitHub plan; private-repository workflows or excess usage can incur charges. Public monitoring history may expose endpoint details.
GPL-3.0 open-source uptime and status-page server with HTTP/TCP/UDP/ICMP/gRPC monitoring, status graphs and notification integrations; no software subscription or monitored-endpoint quota.
Self-managed deployment, database, TLS, backups and server resources are not included; SMS or other third-party alerting services may charge. GPL-3.0 obligations apply when distributing modified software; this is the statping-ng fork, not a hosted free plan.
Self-hosted AGPL-3.0 continuous profiling server for CPU, memory and application performance with profiling SDK/OTLP ingestion and Grafana visualization; no vendor software ingestion quota.
Pyroscope 2.0 uses object storage for profiles; storage, compute, instrumentation and network traffic are user-provided and may cost extra. AGPL network-source obligations apply to modified versions; Grafana Cloud is a separately billed offering.
Apache-2.0 open-source Prometheus-compatible metrics querying, high availability and long-term retention; no software ingest or retention quota.
Self-hosted components require Prometheus and compute; object storage, network egress and long-term retention incur infrastructure/provider costs.
GPL-2.0-licensed Checkmk Community monitoring engine, web UI, agent and agentless checks, and community plugins; self-hosted without a subscription or service-count trial expiry.
Free Community edition differs from paid Pro/Ultimate in advanced automation, performance and support. Requires own Linux host or container, storage and monitoring agents; operating costs and GPL-2.0 obligations apply. No hosted free monitoring allowance.
AGPL-3.0-only open-source horizontally scalable Prometheus-compatible metrics storage; no vendor-enforced ingestion or retention quota in the self-managed software.
Running Mimir requires self-managed compute and object storage, potentially significant operational costs; AGPL-3.0 network-source obligations may apply to modified deployments. Grafana Cloud pricing is separate.
Apache-2.0 self-hosted endpoint probe exporter for HTTP/HTTPS, DNS, TCP, ICMP and gRPC; no software-imposed monthly probe, target or seat limit.
Requires your own Prometheus-compatible monitoring stack, compute and network; network egress may cost money. Protect the /probe endpoint from untrusted target requests; ICMP probes may require extra operating-system privileges.
MPL-2.0 open-source Rust agent/aggregator to collect, transform and route logs and metrics using configurable sources, transforms and sinks; no software event or host quota.
Self-operate the agent or aggregator and pay for any compute, network, buffering, log storage and paid telemetry destinations; metrics are beta in upstream docs and trace support is not generally available.
Apache-2.0 self-hosted alert grouping, deduplication, routing, silencing and inhibition with webhook/email receiver integrations; no software alert or instance quota.
Operate and secure your own Alertmanager instances and monitoring pipeline; Prometheus storage, servers, SMTP, SMS, PagerDuty and other third-party notification integrations may incur separate costs.
Apache-2.0 open-source log and event collection/routing with a plugin ecosystem; no Fluentd core license fee, per-node cap or vendor usage quota when self-operated.
Operate and secure Fluentd agents/servers and log destinations yourself. Compute, storage, external SaaS outputs and commercial support can cost money; install current security fixes.
Apache-2.0 open-source observability dashboard server, CLI and dashboard-as-code tools supporting Prometheus, Tempo, Loki and Pyroscope; no software seat or dashboard quota.
Self-host and operate Perses on your own compute; data sources, metrics/log storage, network and infrastructure are not included. Managed support or hosted observability services may charge separately.
Apache-2.0 Kubernetes energy and power metrics exporter for nodes, containers and pods; no vendor software monitoring quota or subscription fee.
Requires a self-operated Kubernetes cluster and compatible host power or hardware metrics. Kubernetes nodes, Prometheus storage, dashboards and infrastructure are not free; energy estimates depend on available telemetry.
Apache-2.0 open-source Linux eBPF auto-instrumentation for HTTP/gRPC and other supported application traffic, exporting OpenTelemetry traces and Prometheus metrics; no Beyla software license fee or vendor-imposed self-hosted usage quota.
Requires Linux kernel/eBPF/BTF support and elevated tracing capabilities; operator must supply compute, storage, telemetry backend and security controls. Grafana Cloud and hosted observability usage may incur charges. Beyla code is migrating toward upstream OpenTelemetry eBPF Instrumentation; avoid cataloguing that upstream as a separate equivalent offering.
Apache-2.0 open-source Kubernetes/cloud cost allocation engine, APIs, metrics and UI; no software subscription fee or vendor-imposed usage quota.
Requires your own Kubernetes cluster, Helm and Prometheus; compute, storage, monitoring retention, cloud billing APIs and related infrastructure may cost money. This is not a free hosted Kubernetes or cloud account.
Apache-2.0 open-source container resource monitoring daemon with CPU, memory, disk and network metrics, API and web UI; no license fee or software usage quota.
Runs on your own Docker/Kubernetes host; privileged container and host filesystem mounts may be required, so restrict access and review security. Infrastructure, metrics storage, remote monitoring and network costs are not included.
MIT-licensed self-hosted disk health dashboard with S.M.A.R.T metrics, historical trends and disk failure thresholds; no vendor software license fee or usage quota.
Requires a server with disk S.M.A.R.T access and a self-operated collector/web application; device or privileged Docker access can have security implications. Storage, backup and server costs are not included; monitoring is not a substitute for backups.
Apache-2.0 open-source Kubernetes add-on exporting deployment, node, pod and other Kubernetes API object state metrics to a Prometheus-compatible endpoint, with no software license fee.
Requires your own Kubernetes cluster and separate metrics scraper/storage; it reports API object state, not full application tracing or node/container resource telemetry. Compute, storage and Prometheus infrastructure are not included.
Apache-2.0 open-source distributed tracing collector, query API and UI with no vendor software subscription or built-in license usage quota.
Operate the Zipkin server yourself using Java/Docker and instrument applications. Persistent trace storage may require Cassandra, Elasticsearch or another backend; compute, storage, messaging and network charges are separate. No hosted free tracing service is included.
Apache-2.0 licensed Linux server monitoring daemon and terminal UI with local DuckDB metrics history, hardware health checks, alerts and SQL console; self-managed software with no vendor-imposed usage quota or expiry.
Free software only, not free VPS or hosted monitoring. Requires your own Linux server and storage; alert delivery and remote access require configuration. Runs a per-machine daemon rather than a centralized hosted service. Review security and production suitability before installation.
Free self-hosted Cacti software under GPL-2.0; no vendor-hosted resource quota or recurring credit is included.
Requires your own PHP web server, database, RRDtool, SNMP setup and infrastructure; hosting, operations and network access can incur costs. GPL-2.0 license obligations apply to redistribution; no managed cloud service is included.
MIT-licensed self-hosted multi-cloud infrastructure monitoring dashboard with scheduled asset status checks, 30-day uptime history, team access and email alerts; no software subscription or expiry stated.
Requires self-provided compute, PostgreSQL, RabbitMQ and provider API credentials; cloud resources and external SMTP delivery are not included. Configure read-only cloud credentials and review security before production use.
Free MIT-licensed local desktop application for on-demand SQL Server and Azure SQL monitoring, including collectors, alerts, query analysis and local DuckDB/Parquet storage; no software subscription, per-server quota or expiry stated.
Lite runs on a Windows workstation and monitors existing SQL Server instances remotely; it does not include SQL Server, Azure/RDS database resources or hosting. Monitoring credentials need VIEW SERVER STATE permission. Paid support is optional; Darling continuous-collection edition is a separate deployment model.
MIT-licensed self-hosted website and API monitoring with HTTP, ICMP and TCP checks, SSL expiry alerts, multi-region probes, status pages and incident notifications; no vendor software quota or expiry stated.
Requires self-operated Docker infrastructure with PostgreSQL/TimescaleDB, Redis and sufficient RAM (about 2 GB minimum). Remote probes, SMTP, storage, domains and optional third-party alert services may incur costs; no free managed hosting is included.
Free MIT-licensed self-hosted uptime monitoring with HTTP/service checks, SQLite history, status pages, alerts and peer confirmations; no software usage quota or expiry stated.
Requires user-provided host, storage and network; Telegram/SMTP or other notification providers may incur costs. Configure monitoring targets and secrets securely; no free hosted monitoring infrastructure included.
Free MIT-licensed self-hosted server monitoring dashboard with lightweight agents, live resource metrics and historical charts; no vendor-hosted free quota.
Requires a user-operated monitoring server and authorized agents; hosting, bandwidth, storage and backups are not included. Restrict dashboard, agent credentials and remote-control capabilities to systems you own or are authorized to manage.
Free MIT-licensed self-hosted Linux VPS monitoring dashboard with live CPU, RAM, swap, disk, network, Docker container and process metrics; no software quota or expiry.
Runs on your own Linux VPS; hosting, bandwidth and optional domain/TLS infrastructure are not included. Protect the web dashboard with a bcrypt password and HTTPS; disabling authentication or exposing port 8.088 publicly increases risk. Separate vpsmon.cloud multi-server service is not included.
Free GPL-3.0-or-later licensed network monitoring software with SNMP auto-discovery, device health and alerting on user-operated servers; no vendor-hosted free quota or software license charge.
Requires self-managed PHP/database/web infrastructure, network and SNMP access, secure credentials, updates and backups. Hardware, storage, notifications and optional commercial support are separate; GPL license and bundled third-party notices apply.
Free BSD-2-Clause terminal log viewer with automatic format detection, merged chronological logs, filtering and SQLite-based analysis on local files; no vendor-hosted usage quota.
Runs locally on user-provided hardware and only analyzes logs the user can access; no hosted log ingestion, storage, alerting service or retention is included. Handle sensitive log data carefully and retain license notices.
Free MIT-licensed CLI for YAML-configured synthetic monitoring of HTTP endpoints and supported services with configurable notifications; no software license fee or hosted probe quota.
User runs and maintains probes and schedules on their own machine or infrastructure; no vendor-managed monitoring network or SLA. Third-party notifications, target databases, CI runners and hosting may cost extra.
Free self-hosted system and network monitoring with graphing and extensible plugins; no software usage quota.
Requires your own server, storage, and maintenance; infrastructure and connectivity are not included. GPL-2.0 terms apply to redistribution and modifications; no managed hosting or uptime SLA.
MIT-licensed self-hosted uptime monitoring with HTTP, ICMP, SSL and heartbeat checks, email/Telegram alerts and dashboard; no vendor-enforced software usage quota or expiry documented.
Self-hosted software only: provide Docker host, persistent SQLite storage, HTTPS, backups and SMTP/Telegram services. Upstream advertises monitoring 500+ endpoints but this is not a guaranteed free hosting quota. Change default admin/admin credentials on first login and set a strong SECRET_KEY before exposing the service.
Free AGPL-3.0 community network monitoring software for self-managed deployments; no published license-based device or time quota.
Self-hosting requires your own server, database and operations; infrastructure and support are not free. AGPL-3.0 obligations apply, including network-use source availability where applicable. Horizon community releases may include features not production-ready; paid Meridian subscription is separate.
Free MIT-licensed self-hosted Go application for agentless SSH monitoring of Linux and Windows hosts, resource metrics, drift checks, remote terminals and file operations; no vendor-enforced software quota or expiration.
Requires your own machine and SSH access to monitored hosts; hosting, storage, backups and any external notification services are not included. Privileged SSH and browser terminal access require careful access control, HTTPS, key management and production security review. Historical metrics retention defaults to 7 days.
MIT-licensed local internet monitoring software with outage history, latency and DNS checks, scheduled speed tests, webhook alerts, Prometheus metrics, and a local dashboard; no software usage quota or expiry published.
Runs on your own Linux, macOS, Windows or Docker host; no free VPS, bandwidth, storage or external notification service is included. Speed tests consume internet data; Docker network and NET_RAW permissions need care, and optional Ookla speed tests use external servers.
MIT-licensed self-hosted domain expiration monitor with unlimited domains documented in upstream README; automated WHOIS/RDAP checks and email, Telegram, Discord, Slack and webhook alerts. No vendor software subscription or expiry.
Requires own PHP 8.1+ hosting, database, scheduled cron, backups, HTTPS and secure configuration; SMTP and third-party notification services may charge. WHOIS/RDAP coverage varies by TLD. This is free software, not free hosted monitoring. Independently maintained fork of Hosteroid/domain-monitor.
Free MIT-licensed self-hosted status page and uptime monitor with HTTP, TCP, ping, DNS and heartbeat checks, incident and maintenance timelines, alerts, and SQLite storage; no vendor software quota or expiry published.
Requires your own Docker host, persistent storage, backups and HTTPS; email, ntfy and other outbound alert services may have separate costs. Individual check results default to 14-day retention, with daily summaries kept longer. Set a strong admin password and protect the admin interface; no hosted monitoring infrastructure is included.
GPL-2.0-or-later self-hosted network latency and packet-loss monitoring with RRDtool historical graphs and alerts; no software license fee or vendor-imposed usage quota.
Requires self-operated Unix/Linux host, network probes, RRDtool and storage; hosting, connectivity and maintenance are not free. GPL redistribution obligations apply; no managed hosting allowance is included.
MIT-licensed self-hosted uptime monitoring software with HTTP/TCP/ping/heartbeat probes, alert channels, status pages, Docker/Helm server edition and Windows standalone edition; no vendor software quota or expiry stated.
Requires own server or Windows machine; TimescaleDB, Redis, networking, backups and operations are self-managed. Third-party Slack/PagerDuty/SMS integrations may charge separately. Project describes itself as early but working; review security and deployment readiness before production. No free hosted monitoring resources included.
MIT-licensed self-hosted uptime monitor with HTTP, ping, TCP/port, DNS and push checks, SSH terminal dashboard, status pages, and alert integrations; no software usage quota or expiration stated.
Bring your own server, storage, networking and notification providers; no free hosted compute or email delivery included. Requires SSH public-key admin setup; Docker ICMP checks need ping_group_range configuration. PostgreSQL recommended for production clustering.
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