The short version
The short answer
Trackingplan is broad: it watches analytics and marketing tracking across web and apps, and helps keep a tracking plan in line. TagSentry is narrower on purpose. It watches the events and tags on your website, starts free, bills monthly, and runs your consent banner in the same line of code.
Where Trackingplan is better
- Beyond the website. It covers mobile apps and product analytics tools. We only watch websites.
- Tracking plans. It's built around a plan of what should be tracked, and flags drift from it. We show what arrives, and alert when key events stop, drop or arrive empty.
- Cross-tool coverage for teams with many analytics destinations.
Where TagSentry is better
- Starts at $0, monthly. Free up to 250,000 events a month, then $19 up to a million. Trackingplan starts at $249 a month on an annual plan.
- Consent in the same product. The banner, regional rules and consent records come with the same line, and monitoring follows the same consent rules.
- Made for Tag Manager. Connect your container and every event shows the tags it fired and where they sent data.
- Plain alerts. One email when something breaks, one when it recovers.
Price, side by side
Prices read in September 2026.
| Trackingplan | TagSentry Event monitoring | |
|---|---|---|
| Entry | $249 a month, billed annually | Free to 250,000 events a month |
| Next | Enterprise from $1,750 a month | $19 (1 million events), $49 (5 million), $149 (25 million) |
| Billing | Annual | Monthly, a level that rises with events |
Switching
- Create a site and choose Event monitoring.
- Add our monitoring tag through Tag Manager, or paste our one line first in
<head>. - Pick your key events.
- Run both for a couple of weeks and compare what each catches.
Questions
Does TagSentry monitor mobile apps?
No, websites only.
Can I send alerts to Slack?
Yes, on Pro. Email alerts are free on every plan.
What counts as an event?
One thing we saw and stored on a page view: a tag firing, a tracker request or a dataLayer push.