Free
$0
For the side project you'd rather not fund involuntarily.
- 1 Cloudflare account
- 3 budgets
- Email alerts
- 15-minute polling
Cheaper than the overage it catches
One caught retry loop pays for years of Pro. Start on Free and upgrade when 15-minute polling starts to feel slow.
Pro
$19/mo
For teams whose Cloudflare bill has a comma in it, or could.
- 5 Cloudflare accounts
- 25 budgets
- Slack, Discord & signed webhooks
- 5-minute polling
- 14-day free trial, no card
Enterprise
Custom
For orgs where "the Cloudflare account" is plural and audited.
- Unlimited Cloudflare accounts
- Unlimited budgets
- Priority support
Monitoring runs on Cloudflare Workers, naturally. We watch our own bill with SignalFlare.
Plans, side by side
| Free | Pro | Enterprise | |
|---|---|---|---|
| Price | $0 | $19/mo | Custom |
| Cloudflare accounts | 1 | 5 | Unlimited |
| Budgets | 3 | 25 | Unlimited |
| Polling interval | 15 min | 5 min | 5 min |
| Per-service rules | ✓ | ✓ | ✓ |
| Projected-overrun alerts | ✓ | ✓ | ✓ |
| Email alerts | ✓ | ✓ | ✓ |
| Slack & Discord | — | ✓ | ✓ |
| Signed webhooks | — | ✓ | ✓ |
| Free trial | — | 14 days, no card | — |
| Support | Priority |
Pricing questions
Do I need a credit card for the trial?
No. The Pro trial runs 14 days without a card. When it ends you drop to the Free plan limits unless you upgrade. We don't have your payment details, so nothing can be charged by surprise — that would be a strange failure mode for a company selling billing alerts.
Why pay for this when Cloudflare has budget alerts?
Cloudflare's alerts (April 2026) are an email, one number for the whole account, PAYG billing only. No Slack, no per-service rules, no projections. If that's enough for you, use them and keep your $19. SignalFlare is for when you want to know that R2 specifically doubled in the last hour, in the channel your team reads, before the cap is hit.
How accurate are the estimates?
Cloudflare samples its analytics, so our dollar figures can drift a few percent from the invoice. Direction and timing are what matter for an alert, and those hold. Every number in the app is labelled as an estimate.
Can I cancel Pro whenever?
Yes, from the dashboard, effective at the end of the billing period. Your budgets and alert history stay; anything over the Free limits pauses until you resubscribe or trim down.