Email alerts when your website traffic spikes 3x
Simplytics emails you the morning after any of your sites does about 3× its usual traffic, with no threshold to configure. Turn on spike alerts once and every site on your account is watched; the alert names the site, yesterday's views and the typical level. There is nothing to set up per site and no number to guess.
Most tools that offer this ask you to pick a threshold first — a visitor count that, once crossed, sends the mail. That works, but it means you have to know in advance what "unusual" looks like for each site, and revisit it as the site grows. Simplytics takes the opposite approach: it compares yesterday to the site's own recent baseline and only mails you when the jump is genuinely out of character.
What exactly triggers an alert
An alert fires for a site when both of these are true for yesterday:
- yesterday's views are at least 3× the median of the previous 14 days, and
- yesterday had at least 100 views.
The 100-view floor stops a tiny site from firing on noise (three views one day, ten the next is a 3× jump but not news). The median — not the average — is what "usual" is measured against, and quiet days are counted as zero in that 14-day window, so steady growth never trips it: a site drifting from 100 to 150 views a day is well under 3× and stays silent.
Here is the rule applied to a few sites, so you can predict your own:
| Typical (14-day median) | Yesterday's views | Alert? | Why |
|---|---|---|---|
| 20 / day | 140 | Yes | ≥ 100, and ≥ 3× the median (60) |
| 5 / day | 120 | Yes | ≥ 100, and far past 3× (15) |
| 20 / day | 80 | No | under the 100-view floor |
| 50 / day | 140 | No | ≥ 100, but under 3× the median (150) |
| 200 / day | 300 | No | ≥ 100, but under 3× the median (600) |
In short: the bar is whichever is higher, 100 views or 3× your normal day.
How often it can email you
At most one spike alert per site per week. After an alert, that site is quiet for seven days while the new level settles into the baseline — otherwise a single busy weekend would mail you every morning it stayed high.
The one exception is a spike that keeps climbing. If a site alerts, then does 2× that alerted level again inside the quiet week, the escalation breaks the cooldown early and you hear about it. "It doubled, then doubled again" is exactly the moment you would not want silenced.
Turning it on
Spike alerts are their own switch, separate from the weekly digest, on the Account page: the toggle reads Email me when a site spikes. Flip it on and it covers every site you track — there is no per-site configuration and no threshold field, because the trigger above is computed for each site from its own history.
Each email carries a one-click unsubscribe that stops only spike alerts; your weekly digest keeps arriving. The two are independent opt-ins, so you can run one, both or neither. Both are cookie-less by design — the alert is built from the daily aggregates Simplytics keeps, never from raw visitor records, which are deleted nightly.
How other tools handle it
Spike alerts exist elsewhere, but the mechanism differs, and the difference is the whole point of choosing one over another:
| Simplytics | Plausible | Fathom | GA4 | |
|---|---|---|---|---|
| Trigger | Automatic: 3× the 14-day median, ≥ 100 views/day | You set a current-visitor threshold (default 10) | None documented | You build a Custom Insight condition |
| Configuration | None | Per-site threshold | — | Per-metric condition |
| Timing | Morning after | Real-time, up to twice a day | — | On the condition you set |
| Drop alerts | No | Yes | — | If you build one |
Plausible's traffic-spike notifications are a genuinely different tool: they watch current visitors against a threshold you choose (10 by default), send at most twice in 24 hours, and can also warn you when traffic drops. That is closer to real time than a next-morning email, and the drop alert is something Simplytics does not offer. As of September 2026 Fathom sends scheduled email summaries but does not document a spike alert, and GA4 can email you through Custom Insights — but you author the anomaly condition yourself.
Where Simplytics is not the right choice
The alert is a next-morning heads-up, not a live pager. Because it compares whole days, you learn about a spike the morning after it happened — useful for noticing that a post got picked up, not for reacting during the surge. If you need to jump on a live thread or scale infrastructure while traffic is still climbing, Plausible's real-time current-visitor alert fits that job better.
It is also deliberately un-tunable. There is no custom threshold, no per-site number, and no drop alert — the 3×-median rule is the only rule. If you want to be paged the instant concurrent visitors cross a figure you set, or told when traffic falls, Simplytics does not do either, and a tool built around thresholds will serve you better. And a site that never reaches 100 views in a day will simply never trip the alert.
What it costs
Spike alerts are included on the only plan there is — there is no premium tier that gates them. The plan is $1/month, billed yearly ($12/year), against Plausible's $9/month for 10,000 pageviews, and it covers 50,000 pageviews a month across up to 12 websites, with a 30-day free trial that needs no card. The tracker stays a cookie-less ~1.8 KB script with data kept in the EU. If you are weighing it up, the Plausible comparison and the pricing on the landing page lay out the rest, and you can see the dashboard the alert links to on the live demo.
Two related how-tos, if you are setting up a site to watch: how to compare any period against the one before it to see whether a spike stuck, and how to put a live view counter on every post once one takes off.
Last verified: 2026-09-09.