Observability

Honeybadger · Developer

One user, unlimited projects and 5,000 errors a month kept for 15 days, plus one monitor (an uptime check or a cron check-in) with uptime checks every 5 minutes. Past the quota each project is limited to one error a minute, and processing stops at 125% until the next month.

• 5Kerrors / month
• 15 dretention
• 1seats

• Commercial use
• Can't bill you
• No card

Axiom · Personal

500 GB of data loading and 10 GB-hours of query compute a month, 25 GB of storage and 30-day retention for one user.

• 500 GBdata loading / month
• 30 dretention
• 25 GBstorage

• Can't bill you
• No card

Checkly · Hobby

10 uptime monitors at up to 2-minute frequency plus 10,000 API and 1,000 browser check runs a month, for one user.

• 10monitors
• 2 mincheck interval
• 10KAPI check runs / month

• Can't bill you
• No card

Cronitor · Hacker

5 monitors for cron jobs, heartbeats, websites or APIs, checked as often as every 5 minutes, for one dashboard user.

• 5monitors
• 5 mincheck interval
• 1seats

• Can't bill you
• No card

Grafana Labs · Free

10k active metric series, 50 GB of logs and 50 GB of traces a month, 14-day retention and 3 active users, never billed.

• 10Kseries / month
• 14 dretention
• 50 GBtraces / month

• Commercial use
• Can't bill you
• No card

New Relic · Free

100 GB of data ingest a month shared by all telemetry, one full platform user plus unlimited basic users, and at least 8 days of retention.

• 8 dretention
• 100 GBdata ingest / month
• 1full platform users

• Can't bill you
• No card

Healthchecks.io · Hobbyist

Monitor 20 cron jobs or heartbeat checks for free, keeping the last 100 pings per job; accounts with no log-ins for over a year are deleted 30 days after a warning email.

• 20jobs
• 100log entries per job

• Deletes after 395 idle days
• Commercial use
• Can't bill you
• No card

Rollbar · Free

5,000 error occurrences and 1,000 session replays a month for unlimited users and projects, with 30-day data retention and no AI credits. At the monthly limit Rollbar stops processing new events until the account renews.

• 5Koccurrences / month
• 30 dretention
• 1Ksession replays / month

• Stops at the limit
• No card

GlitchTip · Free

Hosted GlitchTip error tracking on the US or EU instance: 1,000 events a month per organization, unlimited projects and team members, and 90-day event retention. Past the quota, GlitchTip throttles events and blocks them fully at twice the limit.

• 1Kevents / month
• 90 dretention
• Unlimitedprojects

• Can't bill you

Honeycomb · Free

Up to 20M events and 100M metric data points a month with 60-day event retention; persistent overage leads to throttling, not billing.

• 60 dretention
• 20Mevents / month
• 100Mmetric data points / month

• Can't bill you

Sentry · Developer

One user with 5,000 errors a month, unlimited projects and a 30-day lookback; more volume needs a Team or Business plan.

• 5Kerrors / month
• 30 dretention
• 1seats

• Can't bill you

UptimeRobot · Free

50 monitors checked every 5 minutes, including HTTP, keyword, ping and port checks, with a basic status page; accounts with no log-in for 6 months are deactivated and all their monitors paused.

• 50monitors
• 5 mincheck interval

• Commercial use
• Can't bill you
• Pauses after 180 idle days
• No card

StatusCake · Free

10 uptime monitors checked every 5 minutes, plus 1 page speed, 1 domain and 1 SSL monitor, with email and integration alerts (Slack, Microsoft Teams, Discord and more) for one user. The Terms limit monitoring to sites you own, control or have permission to check and ban keep-alive use; a free account not logged into for 90 days may be paused or deleted.

• 10monitors
• 5 mincheck interval
• 1seats

• Deletes after 90 idle days
• Commercial use restricted
• Stops at the limit
• Pauses after 90 idle days
• No card

Better Stack · Free

10 uptime monitors with 3-minute checks, 10 heartbeats and a status page, plus 3 GB of logs a month kept for 3 days.

• 3 GBlogs / month
• 3 dretention
• 10monitors

Datadog · Free

Core infrastructure metric collection and visualization for up to 5 hosts, with 1-day metric retention.

• 1 dretention
• 5hosts at once

BugSnag · Free

One user with 7,500 error events and 1M performance spans a month and 7-day data retention, aimed at solo users' passion projects. SmartBear's terms put free-version access under its Trial Terms, which bar commercial and production use. BugSnag does not say how many projects Free allows or what happens to events past the quota.

• 7.5Kerror events / month
• 7 dretention
• 1seats

• Non-commercial only

Amazon Web Services · Always Free

Free each month on both AWS plans: 10 custom metrics, 10 alarm metrics, 1 million API requests, 5 GB each of log ingestion, log storage and Logs Insights scans, 3 dashboards and 1,800 Live Tail minutes. Usage above that is billed on the Paid plan and paid from credits on the Free plan.

• 5 GBlog data ingestion / month
• 10custom metrics / month
• 10alarm metrics / month

• Commercial use
• Bills overage

Google Cloud · Free Tier

50 GiB of log storage free per project every month, with logs kept 30 days at no retention cost; a billing account with a payment method is required, and logs past the allowance are billed at $0.50 per GiB.

• 50 GBlogs / month
• 30 dretention

• Commercial use
• Bills overage
• Card required

Google Cloud · Free Tier

Google Cloud's own service metrics are free, plus 150 MiB a month of chargeable metrics (custom, agent, user-defined log-based) and 1 million time series from API reads per billing account, and 1 million uptime-check runs per project; needs a billing account, and overage is billed.

• 42 dretention
• 150 MBchargeable metric data / month
• 1Mtime series returned by API reads / month

• Commercial use
• Bills overage
• Card required