| Deploy failed | Free and TrialProject webhook to Slack, Discord or any URL | HobbyProject webhook to Slack, Discord or any URL | ProProject webhook to Slack, Discord or any URL | OpyntelDeploy failures on one timeline for every project, with an alert by email, Slack or SMS depending on your plan. |
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| Crash | Free and TrialProject webhook on a crashed deployment | HobbyProject webhook on a crashed deployment | ProProject webhook on a crashed deployment | OpyntelAn alert when a service goes down, on rules scoped to a project, environment or service. |
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| CPU | Free and TrialNo monitors | HobbyNo monitors | ProMonitor threshold by email, in-app or webhook | OpyntelCPU threshold rules on any plan, across every project and environment. |
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| Memory | Free and TrialNo monitors | HobbyNo monitors | ProMonitor threshold by email, in-app or webhook | OpyntelMemory threshold rules on any plan, across every project and environment. |
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| Disk | Free and TrialVolume nearing capacity, by webhook | HobbyVolume nearing capacity, by webhook | ProVolume webhook, plus disk usage monitors | OpyntelDisk threshold rules and a forecast of when a disk fills, on any plan. |
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| Spend | Free and TrialOn the Free plan: email at an amount you set, optional hard limit. Not stated for the Trial | HobbyEmail at an amount you set, optional hard limit | ProEmail at an amount you set, optional hard limit | OpyntelMonthly budgets per project as alert rules, with daily spend per service. |
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| Certificate expiry | Free and TrialNot in Railway's alert list | HobbyNot in Railway's alert list | ProNot in Railway's alert list | OpyntelOpt-in certificate checks on your public domains, with an alert before expiry. |
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