Sentry free tier includes Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs… Catalogue date August 2026. Compare with 43 alternatives in Monitoring.
Subtypes in Monitoring: error_tracking — captures unhandled exceptions with stack traces and groups repeat occurrences into one issue; 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; uptime_check — polls a URL or host from outside your infrastructure on a fixed interval and alerts when it stops answering; it runs no code of yours; cron_monitor — waits for a scheduled job to check in and alerts on the absence of the check-in rather than on a failure it observed. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Cron Monitoring 1 cron monitor” How we use this.
Sentry's free tier offers Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments. We rate it stable. 2 recorded changes narrowed the terms, the most recent on 2025-08-27. Best for monitoring workloads — 43 alternatives available.
Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments
We read that on 2026-11-02 from https://sentry.io/pricing/, and our check recorded: the page names Sentry as "sentry" and states "$0". A source check reads the cited page for the service's name and a price; the limits above are from our own record.
For solo devs working on small projects Free $0 Limited to one user One user Error Monitoring and Tracing Alerts and notifications via email 10 custom dashboards MCP access
These alternatives were identified from Sentry’s pricing changes as recommended replacements.
How Sentry compares against every one of the 43 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 |
|---|---|---|
| Sentry | Developer | stable |
| UptimeRobot | Free Free $ 0 /month. 50 monitors, 5 min. |
stable |
| 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 |
| MonitorMonk | Free Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages. |
stable |
| syagent.com | Free Free server monitoring service with alerts and metrics. Up to 25 servers and 25 uptime monitoring instances. |
stable |
| Uptimia | Free Website uptime monitoring. The free plan has one website and one API monitor, each checked as often as every 5 minutes; transaction, page-speed and real-user monitoring start with the paid plans. |
stable |
| Pulsetic | Free Uptime monitoring — 10 monitors (HTTP/heartbeat/API), 5-minute check interval, 3 regions, 3-month history, 3 status pages |
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 |
| Pingmeter.com | Free Free account is limited to accounts with 1 category and less than 5 uptime monitors. It exclude pro features such as sms/voice notification, scheduling and recovery actions. |
stable |
| Datadog | Free Infrastructure monitoring free for up to 5 hosts with 1-day metric retention |
stable |
| SweetUptime | Free Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 servers, 20 uptime monitors and 20 domain & SSL monitors for free, with 5 status pages and a 1-minute check interval. |
stable |
| SigNoz | Free OSS OpenTelemetry-native observability with logs, metrics and traces in one tool. The community edition is free to self-host. |
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 |
| skylight.io | Free Application performance monitoring — free for first 100,000 traces/month. |
stable |
| Simple Observability | Free Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server. |
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 |
| uptimetoolbox.com | Free Basic $ 0 per month 5 Monitors 3 Minute Checks 1 Status Page 1 Server 7 Day Hi-Res Retention 3 Month Historical Data |
stable |
| Healthchecks.io | Free Cron job and scheduled task monitoring — 20 monitors, 100 log entries per job, email/webhook/Slack/Telegram alerts, API access. Also free for open-source projects (Business plan) |
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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| phare.io | Free Superseded: As of 2026-08-28, phare.io reads: The Hobby plan is free forever, no credit card required. You get unlimited team members, unlimited projects, and all the core features. |
stable |
| Prometheus | Free OSS Free OSS (Apache 2.0). CNCF graduated time-series monitoring and alerting. |
source unconfirmed |
| 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 |
| 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 |
| Servervana | Free Uptime monitoring with support for large projects and teams. Free tier: 10 HTTP monitors, 1 DNS monitor and 1 status page. |
source unconfirmed |
| sitesure.net | Free Website and cron monitoring - 2 monitors free |
source unconfirmed |
| 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 |
| downtimemonkey.com | Free 60 uptime monitors, 5-minute interval. Email, Slack alerts. |
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 |
| 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 |
| StatusCake | Free Uptime monitoring — 10 monitors, 5-min intervals, 1 page speed monitor, 1 domain monitor, 1 SSL monitor, email alerts, basic integrations |
stable |
| deadmanssnitch.com | Free Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign up |
source unconfirmed |
| pingbreak.com | Free Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email. |
source unconfirmed |
| inspector.dev | Free A complete Real-Time monitoring dashboard in less than one minute with a free forever tier. |
source unconfirmed |
| Jaeger | Free OSS Free OSS (Apache 2.0). CNCF graduated distributed tracing system. |
source unconfirmed |
| bleemeo.com | Free Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules. |
unrated |
| UptimeObserver.com | Free Get 20 uptime monitors with 5-minute intervals and a customizable status page—even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. |
source unconfirmed |
| pingpong.one | Free Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. |
source unconfirmed |
| 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: PagerDuty (shares no subtype with this product), incident.io (shares no subtype with this product), StatusPile (shares no subtype with this product), assertible.com (shares no subtype with this product), Core Web Vitals History (none of this category's subtypes apply), 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), 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), robusta.dev (none of this category's subtypes apply), statusgator.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=Sentry
curl https://agentdeals.dev/pricing-changes/feed.xml?vendor=Sentry