UptimeRobot is a website monitoring service with a forever free plan that lets you register with just an email and monitor up to 50 websites, servers, or keywords with 5-minute intervals. Setup takes only a few clicks.
For faster checks and advanced features, paid plans offer 1-minute or 30-second intervals, along with SSL certificate, domain expiry, and heartbeat (cron job) monitoring. You can also create up to 100 status pages, customize them to match your brand, protect them with a password, and allow subscribers to receive updates.
Get notified instantly via email, SMS, voice calls, or integrations with Slack, Zapier, PagerDuty, Splunk On-Call, Telegram, Webhooks, Discord, Mattermost, Pushbullet, Microsoft Teams, Google Chat, Pushover, and more. Mobile push notifications are available through the iOS and Android apps.
Other features include maintenance windows, incident tracking with root cause analysis, tags, comments, and filters. Share account with other team members.
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GetResponse is a lifecycle automation platform for businesses that want to drive more consistent, repeatable revenue across the entire customer journey.
We help you move customers from first touch to first purchase, repeat purchase, and reactivation - using email, SMS, push notifications, and lifecycle automation across every stage of the customer journey
With built-in deliverability, behavioral triggers, and deep integrations, you can launch faster, reduce manual work, and turn your lifecycle into a predictable revenue system.
No disconnected tools. No campaign chaos. Just one system designed to move customers forward.
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Knock
The most powerful notification system you'll never build.
Knock is flexible, reliable notifications infrastructure that's built to scale with you. Use our APIs to engage users, power cross-channel workflows, and manage notification preferences.
Move fast with a notification engine that’s ready to scale from your first welcome email to a cross-channel system that puts your customer first. With Knock, you get a team that’s dedicated to one thing and one thing only: your notifications.
Start with email and in-app channels. Instantly add push, SMS, and Slack when you need them.
Predictable pricing that scales with you. No upfront fees or infrastructure set up required.
Power high volume notifications without spending valuable engineering time on messaging infrastructure.
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