Owl Keeper
Owl Keeper: A specialized agency monitor covering websites, infrastructure, domains, certificates and mail security. Ranked #27 of 29 in Web Hosting Monitoring Software by our editors (6.8/10); pricing: Free plan; best for agencies monitoring domains and mail security.
At a glance
- Editor score6.8 / 10
- PricingFree plan
- Best forAgencies monitoring domains and mail security
- Free planYes
- Paid from$490/site/yr
- Included monitors200 monitors
- Facts checked20 Sep 2026
Where it wins
- Monitors certificates, domains, DNS, SPF, DKIM, DMARC, MTA-STS and BIMI
- Supports HTTP, TCP, mail-server, scheduled-job and response-time monitoring
- Includes status pages, webhooks, Slack and Discord alerts
Where it doesn't
- Paid plans are priced per site per month or per site per year
- The Free plan checks every 5 minutes rather than every minute
- Free supports one person and 25 monitors
Our verdict on Owl Keeper
Owl Keeper is a web-based monitoring service for agencies and teams responsible for client websites. It combines HTTP uptime checks with expected status codes and body keywords, TCP port checks, mail-server checks with STARTTLS, and monitoring for certificates, domain registration, DNS, and email authentication. It also covers SPF, DKIM, DMARC, MTA-STS and BIMI, alongside uptime history, response-time charts, scheduled jobs, tags, status pages and webhook alerts. Its focus suits agencies that need to watch both website availability and the surrounding domain and mail-security setup.
The Free plan covers 10 sites, 25 monitors, checks every 5 minutes, stores 30 days of history and supports one person. It also includes unlimited status pages. Agency Starter costs $49 per site per month or $490 per site per year and raises coverage to 50 sites, 200 monitors, checks every minute, one year of history and five people. Agency Growth costs $99 per site per month or $990 per site per year, covering 200 sites with unlimited monitors, two years of history, unlimited people and priority support. The paid tiers are suited to larger client portfolios, while the free tier provides a narrower starting point.
For agency operations, Owl Keeper brings website, certificate, domain, DNS and mail-authentication checks into one specialized service. Alerts can be sent through email, webhooks, Slack and Discord, and status pages can be used across plans. The service is web-only, and its per-site pricing may be less suitable for teams that monitor many targets without managing them as separate sites. Agencies needing this combined web and mail-security scope should consider Owl Keeper; teams seeking a broader, less specialized monitoring approach may prefer an alternative.
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Owl Keeper pricing
All 3 Owl Keeper plans and prices →
Owl Keeper fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $490/site/yr |
| Included monitors | 200 monitors |
| Check interval | 60 seconds |
| Performance monitoring | Yes |
| Port monitoring | Yes |
| Domain and SSL checks | Yes |
| Alert channels | email, chat |
| Deployment | Cloud |
| Platforms | Web |
| Support | |
| Built for | Small business, Mid-market (editorial estimate) |
| Integrations | 3 integrations: Slack, Discord, webhooks |
| Pricing | Free plan (source) |
| Website | owlkeeper.com |
| Facts checked | 20 Sep 2026 |
Owl Keeper integrations
Owl Keeper lists 3 integrations on its own site.
- Slack
- Discord
- webhooks
Alternatives to Owl Keeper
- HostTrackerBroad monitoring coverage with a free plan and paid plans starting at $5 per month.9.4
- SolidPingDeep protocol coverage and alerting for teams that want open-source monitoring.9.3
- ChecklyDeveloper-focused monitoring with deep checks, code workflows, and broad alerting.9.2
See all Owl Keeper alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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