For small teams putting their first services on call.
$29 $23 /mo /mo
Billed monthly ✓ $276 billed yearly · save 20%
- 10 monitored services
- 7-day metric retention
- Adaptive alerting
- Email & Slack routing
Adaptive observability
Alerts that earn
Alerts that earn
the 3am page.
Kelvin learns each service's baseline, collapses the noise into a single signal, and pages a human only when something actually broke — so your on-call sleeps and your customers don't notice.
No credit card · 14-day trial · SOC 2 Type II
p99 latency182ms
error rate0.42%
uptime 30d99.98%
p99 latency · 24h
requests · rpm
recent incidents
checkout-api · latency spike
payments · elevated 5xx
search · auto-resolved
Trusted by on-call teams shipping at scale
Pricing
Pay for signal, not seats.
Every plan includes the full adaptive engine. Scale up retention and routing as your fleet grows — switch billing any time.
For growing engineering orgs that live in their dashboards.
$99 $79 /mo /mo
Billed monthly ✓ $948 billed yearly · save 20%
- 50 monitored services
- 90-day metric retention
- Trace sampling & SLO tracking
- PagerDuty & Opsgenie routing
- Anomaly grouping
For platform teams with compliance and scale requirements.
Custom Custom
Volume pricing
- Unlimited services
- 2-year retention
- SSO/SAML & audit logs
- Dedicated support & SLA
- On-prem collector option
Compare plans
Every feature, side by side.
No asterisks. What you see is what every team on the plan gets.
| Capability | Starter | Pro | Enterprise |
|---|---|---|---|
| Monitored services | 10 | 50 | Unlimited |
| Metric retention | 7 days | 90 days | 2 years |
| Adaptive alerting | ✓ | ✓ | ✓ |
| Trace sampling | — | ✓ | ✓ |
| SLO tracking | — | ✓ | ✓ |
| On-call routing | Slack | PagerDuty | Custom |
| Anomaly grouping | — | ✓ | ✓ |
| SSO / SAML | — | — | ✓ |
| Audit logs | — | — | ✓ |
| Dedicated support & SLA | — | — | ✓ |
From the on-call rotation
Teams that finally sleep through the night.
Our pager volume dropped 64% in the first month. Kelvin pages us for things that are actually on fire, not every CPU blip.
We replaced three tools with one. The adaptive baselines caught a memory leak two days before it would have taken down checkout.
Onboarding took an afternoon. By the next deploy we had SLOs, trace sampling, and on-call routing wired to PagerDuty.
Questions
Everything else.
Do I need a credit card to start the trial?
No. The 14-day trial is fully featured and requires no card. Add billing only when you decide to keep Kelvin.
What counts as a "monitored service"?
Any deployable unit you point a collector at — an API, worker, cron, or function. Adaptive baselines are computed per service automatically.
Can I switch between monthly and annual billing?
Any time. Switching to annual applies the 20% discount on your next invoice; switching back is prorated. No lock-in.
How does adaptive alerting reduce noise?
Kelvin learns each metric’s normal range across time-of-day and traffic patterns, then groups correlated anomalies into one incident instead of a flood of alerts.
Is my telemetry data secure?
Data is encrypted in transit and at rest. Kelvin is SOC 2 Type II, and Enterprise adds SSO/SAML, audit logs, and an on-prem collector option.
What happens when the trial ends?
Your data is retained for 30 days. Pick a plan to keep collecting, or export everything via the API — no hostage data.
Start in minutes
Point Kelvin at one service. See the difference by your next deploy.
14 days free, every feature unlocked, no credit card. Bring your whole team — onboarding takes an afternoon.