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Lengthsman
Monitoring for whole customer journeys

Your shop is up. Nobody can check out.

A ping check only sees that your homepage loads. Lengthsman walks your customers’ path (search, cart, checkout) in a real browser, every few minutes. When a step breaks, you hear which one, with a screenshot, before your customers do.

In early access · we’ll email you when your account is ready · no code
Brightwater Outdoor · shop.example.com Same shop, same minute · 02:14
A ping check sees 200 OK Up 182 ms
Lengthsman walks the checkout Failing at step 6
  1. Go to the shop 1.1 s
  2. Search “rain jacket” 0.8 s
  3. Add to cart 0.6 s
  4. Go to checkout 0.9 s
  5. Fill in your details 2.3 s
  6. Click NextFailed after 10 s The Next button stayed greyed out. Nobody can reach payment.
  7. Pay Skipped
Alert sent by email and Slack · 02:16 See what the alert shows
How it works

Show us the path once. We walk it for you, all day.

1

Record the path

Click through your own site in our browser, then point at what must be there, like your welcome message. Every click becomes a step you can read.

  1. 1Go to shop.example.com/login
  2. 2Type your email in Email
  3. 3Type ●●●●●● in Password Secret
  4. 4Click the Sign in button
  5. Check that “Welcome back” is visible
2

Choose where and how often

Run it every 1, 5 or 15 minutes, from the places your customers shop from.

Frankfurt London Virginia
3

Get alerted with the exact broken step

You get the step that broke, a screenshot of that moment, and what went wrong in plain language.

Failing
Step 6 of 7 · Click Next
The Next button stayed greyed out for 10 seconds.
Two kinds of monitor

Start with a page. Add the path when you’re ready.

Uptime monitor

Free · ready in seconds

Checks that a page answers, how fast, and from where. Good for your homepage, an API or a health check.

  • Checks every 1, 5 or 15 minutes
  • Response time from each location
  • Alerts by email, Slack, SMS or webhook
Get early access

Flow monitor

The heart of Lengthsman

Walks a whole journey in a real browser (log in, search, add to cart, check out) and tells you exactly which step broke.

  • Record by clicking, or describe it in plain words
  • Point at what must, or must not, be on the page
  • A reminder to add a check, so a broken page can’t pass
  • Test passwords kept as encrypted secrets
  • A screenshot and full trace of every failure
  • Runs follow your steps exactly, with no AI guessing at run time
See how flows work
When something breaks

An alert you can act on at 3am.

The step that broke
Not “site down”, but “Step 6 of 7: Click Next”.
A screenshot of that moment
Your secrets are covered before the screenshot is stored. If one shows up where we can’t cover it, we don’t keep the screenshot.
What went wrong, in plain words
The full technical trace is one click away, if you want it.
Our problems stay ours
If a check couldn’t run on our side, we say so, retry, and don’t wake you.
Lengthsman Today, 02:16
Failing
Checkout is failing on shop.example.com
Step 6 of 7 · Click the Next button
shop.example.com/checkout/details
BRIGHTWATER OUTDOORCart (1)
Something went wrong. Please try again.
Your details
Emailtest@example.com
Postcode1012 AB
Create a password (optional)
Next
Screenshot at step 6 · London · 1 field masked
What went wrong

The Next button stayed greyed out for 10 seconds, so we couldn’t click it. The page showed “Something went wrong. Please try again.”

Failed 2 checks in a row · confirmed from Frankfurt
Built to be trusted

From where your customers are, with your passwords kept safe.

Checks from around the world

Run from locations across Europe, the Americas, Asia and Oceania. Confirm from a second location before anyone is alerted.

Password●●●●●●●●
Saved as a secret

Passwords stay secret

Test passwords are encrypted when you save them, and nobody can view them again in Lengthsman, not even you. We cover them in screenshots and remove them from traces and logs before anything is stored. If one shows up where we can’t cover it, we don’t keep that screenshot.

  • Email Included
  • Slack Included
  • SMS Depends on plan
  • Webhook Included

Alerts on your terms

Alert straight away, after a few failed checks in a row, or after a set number of minutes. You decide how sure we must be before we wake you.

Why “Lengthsman”

A lengthsman looked after one length of canal, road or railway. They walked it every day and fixed problems before travellers ran into them. We walk your customers’ path, so you hear about a broken step before they do.

Know before your customers do.

We’re opening Lengthsman to a first group of teams. Leave your email and we’ll tell you when your account is ready.

We only use your email to tell you when your access is ready. No newsletter. Privacy