Middleware.io free tier includes Full-stack observability platform — free forever plan: 100 GB/month data (APM, logs…). Verified October 2026. Compare with 27 alternatives in Monitoring.
Subtypes in Monitoring: apm_traces — instruments application code and reports per-request latency, throughput and spans across services; log_management — ingests, stores and queries log lines; the line is the stored unit and retention is a priced dimension; host_metrics — an agent you install on a machine reports CPU, memory, disk and process state for that machine; synthetic_check — runs a check you author — a scripted browser session, a multi-step API call, or an assertion on a response body — on a schedule from outside your infrastructure, and reports whether the behaviour it asserts still holds. We read that on 2026-09-01 from https://middleware.io/pricing/, where it says: “OpsAI SRE Agent Detect, debug & auto-fix issues Synthetic Monitoring Test APIs & prevent outages Browser Testing Test web apps” How we use this.
Middleware.io's free tier offers Full-stack observability platform — free forever plan: 100 GB/month data (APM, logs, infrastructure, traces, RUM…). We rate it stable. The one change we have recorded, a free tier removal on 2026-05-03, was reversed on 2026-09-08. Best for monitoring workloads — 27 alternatives available.
Full-stack observability platform — free forever plan: 100 GB/month data (APM, logs, infrastructure, traces, RUM, synthetics, database, serverless), 1,000 RUM sessions/month, 20,000 synthetic checks/month, 14-day data retention, unlimited users
We read that on 2026-10-26 from https://middleware.io/pricing/, and our check recorded: the page names Middleware.io as "middleware" and states "$0".
Free Forever $0 Free access to all features with monthly limits. Sign Up Now Up to 100GB Data Up to 1k RUM Sessions Up to 20k Synthetic Checks 10 Browser Test Runs 2 million OpsAI Tokens Unlimited Users Community Based Support 14 day retention
How Middleware.io compares against every one of the 27 we list, not against a selection of them. A surface with room for every member of a tied set may rotate their order. A surface with room for only some of them names none of them, because which ones it named would be the claim, and a claim seeded on the date is not the one we serve tomorrow. How we decide this.
| Service | Free Tier | Stability |
|---|---|---|
| Middleware.io | Free | stable |
| Elastic | Free OSS The Elastic Stack — Elasticsearch, Kibana, ingest and basic security — self-managed at no cost on the Free and Open tier under the Elastic License and SSPL, with community support. Platinum (existing customers only) and Enterprise are custom-priced and add machine learning, cross-cluster… |
stable |
| Grafana | Free OSS Grafana OSS — the self-hosted dashboarding and alerting front end, free under AGPL-3.0-only with Apache-2.0 exceptions. Unifies 150+ data sources into one dashboard and supports observability-as-code. |
stable |
| AppSignal | Free Application monitoring (APM, errors, logging) — Our free plan is perfect for startups, hobby, or side-projects 30K requests 1GB logging 5-day retention |
caution |
| Google Cloud Monitoring | Always Free Always Free: all non-chargeable Google Cloud metrics, first 1M monitoring API calls/month. Dashboards, alerting, and uptime checks for GCP resources
|
unrated |
| skylight.io | Free Application performance monitoring — free for first 100,000 traces/month. |
stable |
| syagent.com | Free Free server monitoring service with alerts and metrics. Up to 25 servers and 25 uptime monitoring instances. |
stable |
| 360 Monitoring | Lite Server and website monitoring (formerly Nixstats) — free Lite plan: 1 server monitor, 5 site monitors, 10-minute check interval, 24-hour data retention, email alerts |
stable |
| BetterStack | Free 10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder |
stable |
| New Relic | Free Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention |
stable |
| Datadog | Free Infrastructure monitoring free for up to 5 hosts with 1-day metric retention |
stable |
| Axiom | Personal Observability platform — 500 GB ingest/month, 25 GB storage, 30-day retention, 2 datasets, 1 user, 10 GB-hrs/mo query compute, 256 fields/dataset, 3 monitors, Email/Discord notifiers only |
unrated |
| Cronitor | Hacker Cron job and uptime monitoring — free Hacker plan: 5 monitors, 5-minute check frequency, email, Slack, and webhook alerts, 1 status page (50 subscribers), 12-month data retention, single user |
unrated |
| SigNoz | Free OSS OpenTelemetry-native observability with logs, metrics and traces in one tool. The community edition is free to self-host. |
stable |
| assertible.com | Free Automated API testing and monitoring. Free plans for teams and individuals. |
stable |
| Simple Observability | Free Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server. |
stable |
| OnlineOrNot | Free Uptime and status page monitoring — free plan: 3 monitors (uptime, keyword, heartbeat), 3-minute check interval, 2 team members, 1 status page, SSL monitoring, multi-location checks, email/Slack/Discord alerts |
stable |
| bleemeo.com | Free Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules. |
unrated |
| inspector.dev | Free A complete Real-Time monitoring dashboard in less than one minute with a free forever tier. |
source unconfirmed |
| Grafana Cloud | Free Free tier includes access to all Grafana Cloud services with limited usage, 14-day retention, and community support. 10k metric series, 50 GB logs, and 50 GB traces are included. |
stable |
| Prometheus | Free OSS Free OSS (Apache 2.0). CNCF graduated time-series monitoring and alerting. |
source unconfirmed |
| Sematext | Basic (Free) Observability platform — Logs: 500 MB/day ingestion, 7-day retention. Monitoring: 3 hosts, 3 containers/host, 30-min data retention, 1 alert rule. |
stable |
| netdata.cloud | Free Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub! |
unrated |
| Hyperping | Free Uptime and status page monitoring — free plan: 20 monitors (HTTP, port, ping, keyword), 5-minute check interval, 1 basic status page with real-time updates and subscriber notifications, 1 seat, 1 server monitoring agent, email and webhook alerts |
stable |
| Jaeger | Free OSS Free OSS (Apache 2.0). CNCF graduated distributed tracing system. |
source unconfirmed |
| Sentry | Developer Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments |
stable |
| Xitoring.com | Free Superseded: As of 2026-08-28, xitoring.com reads: The page offers a 14-day free trial, and then paid plans starting at $4.99/mo for Uptime + SSL. We are not publishing our stored Xitoring.com terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. |
unrated — change unconfirmed |
| fivenines.io | Trial Linux server monitoring with real-time dashboards and alerting — no permanent free tier. 14-day free trial with no credit card required; paid plans from €19/month. |
risky |
Left out of this list: UptimeRobot (shares no subtype with this product), Pulsetic (shares no subtype with this product), Healthchecks.io (shares no subtype with this product), StatusCake (shares no subtype with this product), PagerDuty (shares no subtype with this product), Uptimia (shares no subtype with this product), incident.io (shares no subtype with this product), StatusPile (shares no subtype with this product), Core Web Vitals History (none of this category's subtypes apply), deadmanssnitch.com (shares no subtype with this product), downtimemonkey.com (shares no subtype with this product), economize.cloud (none of this category's subtypes apply), incidenthub.cloud (shares no subtype with this product), linkok.com (none of this category's subtypes apply), loader.io (none of this category's subtypes apply), MonitorMonk (shares no subtype with this product), OntarioNet.ca CN Test (none of this category's subtypes apply), pagecrawl.io (shares no subtype with this product), pagertree.com (shares no subtype with this product), phare.io (shares no subtype with this product), pingbreak.com (shares no subtype with this product), Pingmeter.com (shares no subtype with this product), pingpong.one (shares no subtype with this product), robusta.dev (none of this category's subtypes apply), Servervana (shares no subtype with this product), sitesure.net (shares no subtype with this product), statusgator.com (shares no subtype with this product), SweetUptime (shares no subtype with this product), UptimeObserver.com (shares no subtype with this product), uptimetoolbox.com (shares no subtype with this product), Wachete (shares no subtype with this product). Each is still listed in Monitoring, with the vendor's own words we read that from on its page. How we decide this.
We do not push notifications. Every change we record is readable the moment it lands, and the JSON answer carries an ETag — send it back as If-None-Match and an unchanged answer costs one 304.
curl https://agentdeals.dev/api/changes?vendor=Middleware.io
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Middleware.io