What's included in each plan?
Every CertSentry plan runs the same monitoring engine — the same checks, the same multi-region quorum, the same quiet alerting. What changes is how much you can monitor, how often, and which advanced features you unlock.
Compare plans
| Feature | Free | Starter | Pro | Agency |
|---|---|---|---|---|
| Price, monthly | $0 | $5 | $12 | $50 |
| Price, annual | — | $50 | $120 | $500 |
| Monitors | 1 | 10 | 50 | 250 |
| Uptime interval | Daily | 5 min | 1 min | 1 min |
| Monitoring regions | 1 | 1 | 3 | 3 |
| SSL / TLS & validity | ||||
| Domain expiry | ||||
| DNS change monitoring | ||||
| Uptime, TCP & heartbeat | ||||
| Certificate Transparency | ||||
| DMARC domains | 1 | 5 | ||
| Email alerts | ||||
| Slack / Telegram / Discord / webhooks | ||||
| Public status pages | 1 | 3 | 10 | |
| Team seats | 1 | 1 | 10 | Unlimited |
| API access | ||||
| Check-result history | 30 days | 30 days | 60 days | 90 days |
| Priority support |
Annual billing is roughly two months free. Extra DMARC domains can be added to Pro and Agency as a paid add-on.
Which plan fits
- Free — a single personal site or certificate you want to keep an eye on. One monitor, daily checks, email alerts. Free covers personal workspaces only; to invite a team you'll need a paid plan.
- Starter — indie projects and small teams. Ten monitors, 5-minute uptime, every alert channel, your first status page, and API access.
- Pro — production workloads. Fifty monitors, 1-minute uptime from three regions, Certificate Transparency, DMARC for one domain, and ten seats.
- Agency — monitoring many clients. 250 monitors, unlimited seats, DMARC for five domains, ten status pages, the longest history, and priority support.
Reading the limits
- Monitors count individual targets — one monitor can run SSL, domain, DNS and uptime together without each counting separately.
- Regions drive uptime confidence: more regions means a stricter quorum and fewer false alarms.
- Check-result history is how far back the raw 24-hour latency chart and recent-events list reach. The 30- and 90-day uptime bars come from daily rollups and aren't affected by this limit.
Need something bigger, or have a question about a specific limit? Open a ticket and we'll help.