Never miss another
cert about to expire.
Tidelock watches your TLS certificates from outside your stack, runs hourly checks, and emails you 30, 14, 7, 3, and 1 day before any of them expire — so you never hear about an expired cert from a customer first.
Nothing more than needed.
Everything you'd miss.
Tidelock does one thing: watches your certificates and warns you before they expire. No agents to install, no pipeline to rewire, no dashboard you'll never open.
Every certificate, every deadline, one view.
Add the certificates you watch. We put them on a single timeline — what's healthy, what's near renewal, what's already on fire.
A nudge before it breaks.
Email reminders at 30, 14, 7, 3, and 1 day before expiry — and the moment a cert goes expired or unreachable. Tweak the thresholds per account or per cert.
Watched from outside your stack.
Tidelock checks from the public internet — the same way your customers do. When an ACME client silently fails or a vendor quietly swaps a cert, we tell you before a customer screenshots the warning.
Customise the noise floor.
Sensible defaults out of the box — warnings at 30, 14, 7, 3, and 1 day before expiry, plus expired and unreachable alerts. Tighten or loosen each threshold per account, or override on a single cert.
Slack, Discord, and webhook delivery are on the roadmap.
Show, don't tell.
In one line of HTML.
Every monitor publishes its certificate status as a live SVG. Drop it in your footer, your docs, or your README — and let visitors see there's someone watching.
<a href="https://www.tidelock.dev"> <img src="…/badge/k8f2x9a.svg"> </a>
- Pulled live · 5-minute cache
- Light and dark themes
- An SVG. No JS, no cookies.
Three minutes to
zero surprise expiries.
Add the certs you watch.
Drop in a hostname. No DNS changes, no API keys, no agents — just the cert you want watched.
Tell us when to speak up.
Email reminders at 30, 14, 7, 3, and 1 day before expiry. Tighten or loosen the thresholds — or take the defaults and never think about it.
Go back to shipping.
Checks run hourly. You only hear from us when something needs you.
You've read this postmortem before.
A wildcard nobody owned. Four hours of checkout down. The Slack channel existed. The runbook existed. The alert didn't.
No surprises.
Including in the price.
Pick a plan, add a hostname, and the first check runs within minutes. Monthly billing, no contracts, cancel anytime.
Solo
For your side projects and a couple of personal domains.
- 5 monitored certificates
- Hourly checks
- Email alerts
- Customisable thresholds
- 1-year check history
Pro
RecommendedFor builders running real production.
- 50 monitored certificates
- Hourly checks
- Email alerts (Slack, Discord, webhooks soon)
- Customisable thresholds
- 1-year check history
Scale
When 50 monitors stops being enough.
- 300 monitored certificates
- Everything in Pro
- 1-year check history
- Priority support
Enterprise
When 'unlimited' belongs in the contract.
- Unlimited certificates
- Custom retention
- SLA · dedicated support
- Internal CA monitoring (on request)
Questions, anticipated.
Stop finding out
from your customers.
Add the certificates you watch, set your reminder thresholds, and go back to shipping. Plans start at $9/month — cancel anytime.