assertible.com free tier includes Automated API testing and monitoring. Free plans for teams and individuals. Verified November 2026. Compare with 8 alternatives in Monitoring.
Subtypes in Monitoring: 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://assertible.com, where it says: “With Assertible, you can run your API tests against any environment, like staging or production .” How we use this.
assertible.com's free tier offers Automated API testing and monitoring. Free plans for teams and individuals. It's stable — zero pricing changes recorded. Best for monitoring workloads — 8 alternatives available.
Automated API testing and monitoring. Free plans for teams and individuals.
We read that on 2026-11-04 from https://assertible.com/plans, and our check recorded: the page names assertible.com as "assertible" and states "$ 0".
No recorded pricing changes for assertible.com. This is a good sign — stable pricing.
How assertible.com compares against every one of the 8 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 |
|---|---|---|
| assertible.com | Free | stable |
| Middleware.io | Free 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 |
stable |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
Left out of this list: Sentry (shares no subtype with this product), Datadog (shares no subtype with this product), Grafana Cloud (shares no subtype with this product), BetterStack (shares no subtype with this product), Axiom (shares no subtype with this product), UptimeRobot (shares no subtype with this product), Pulsetic (shares no subtype with this product), Healthchecks.io (shares no subtype with this product), Prometheus (shares no subtype with this product), Jaeger (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), Hyperping (shares no subtype with this product), incident.io (shares no subtype with this product), AppSignal (shares no subtype with this product), 360 Monitoring (shares no subtype with this product), StatusPile (shares no subtype with this product), bleemeo.com (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), fivenines.io (shares no subtype with this product), incidenthub.cloud (shares no subtype with this product), inspector.dev (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), Simple Observability (shares no subtype with this product), sitesure.net (shares no subtype with this product), skylight.io (shares no subtype with this product), statusgator.com (shares no subtype with this product), SweetUptime (shares no subtype with this product), syagent.com (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), SigNoz (shares no subtype with this product), Elastic (shares no subtype with this product), Grafana (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=assertible.com
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=assertible.com