Run an Outage Drill: Find the One Third-Party Tool That Could Break Your First Customer Experience

Imagine this: your first customer clicks the onboarding link you sent, and nothing happens. Not because your idea is weak. Not because your pitch was off. Because the tool that carries the link, the calendar, the file, or the login is down. That is the kind of failure that leaves a two-person startup without a next step.

You do not need a disaster plan for every possible failure. You need a small drill: find the one third-party tool that could break your first customer experience, test what happens when it fails, and write the fallback before the outage finds you.

The dependency you can see

Most early startups are not built on a stack. They are built on a handful of tools that do the quiet work: email, scheduling, forms, file sharing, password managers, payment links, a SaaS app you did not choose but now trust. Each one is a third-party dependency. Some are nice to have. A few are load-bearing.

A big outage makes that distinction obvious. For the first customer, the break can start at the login: the onboarding link opens, the sign-in page fails, and the next email never arrives. The shared file is inaccessible, and the calendar invite cannot be opened. An authentication component issue was identified and a remediation strategy was being tested on part of the infrastructure. Users reported practical impacts including login failures, missing emails, and inaccessible files. By the end of the outage, mailbox connectivity had returned to normal but search and backlogged mail queues could remain impaired. That is why an outage contingency is not about proving the tool is perfect. It is about knowing what you will do when it is not.

Run the drill before the next onboarding

Do this before your next customer onboarding, not after the first complaint. Set a timer for a short block. Bring a notebook, a browser, and the person who actually handles customer setup. You are not writing a policy. You are making a small map of where your first-customer workflow can break.

1. List every customer-facing dependency. Write down anything a customer touches or waits for: email links, calendar invites, forms, file folders, password reset flows, payment pages, support inboxes, status pages, the SaaS tool that stores the onboarding checklist.
2. Mark critical versus nice-to-have. Ask: if this tool fails for a few hours, can the customer still complete the first step? If yes, it is nice-to-have. If no, it is critical. A calendar invite may be critical if it is the only way the customer books a call. A shared folder may be critical if it holds the contract or the first deliverable.
3. Define the fallback. For each critical dependency, write a plain-language fallback. The fallback should be boring, fast, and possible under stress.
4. Assign an owner. One person owns the drill. One person owns the fallback. In a two-person startup, that is usually you or the other founder, but it must be a name, not “the team.”
5. Set a test date. Pick a date before the next onboarding. On that date, simulate the failure. Do not just imagine it. Turn off the tool, block the link, or use a test account that cannot log in. Watch what happens to the customer path.

The test should be small enough that you can finish it in an afternoon. You are not trying to break the whole company. You are trying to find the place where a customer gets stuck and no one knows what to say.

The fallback that keeps a customer

The best fallback is not a fancy backup system. It is a message you can send quickly. It should say, in human terms, that something is not working, what you are doing about it, and what the customer should do next. Do not hide the problem. Do not pretend the delay is the customer’s fault. Do not send a generic “we are aware” note that leaves them hanging.

A good fallback message can be a short template:

• What is broken. The login is failing, the email is missing, or the file is inaccessible. Users reported practical impacts.
• What you are doing. We are checking the tool and will provide a replacement link or file as soon as it is back.
• What the customer should do. Please reply to this email or use the backup link in the same note.

Keep that message in a note you can find. Keep the backup link in the same place. Keep the owner’s phone number in the same place. When the outage happens, you will not be calm. You will be answering a customer, checking a status page, and trying to remember where the file is. The drill is not about avoiding panic. It is about making the next step obvious.

After the test, write down what you learned. Was the fallback too slow? Did the customer path depend on a login that could not be recovered? Did the owner not know where the backup link lived? Fix one thing. Then set the next test date. A two-person startup does not need a reliability department. It needs a habit: before a new customer enters the workflow, ask what happens when the tool disappears.

That is the whole point. Before the next onboarding, pick one dependency, test the failure, and save the fallback message in one place.