Why not DIY?
Every serious team needs to know its systems survive failure. Almost no team should spend months building the machine that tests it.
Think about what your customers actually buy. Whatever it is the app, the platform, the widgets you lose sleep over they buy that. They don't buy your ability to run elegant chaos experiments. Nobody has ever signed a contract because of a vendor's GameDay program.
But the scoreboard is lopsided: done well, resilience is invisible no customer ever emailed to praise your failover. Done badly, it's the only thing they remember. Your customers can't tell the difference between a team that rehearses failure and one that doesn't until the day it matters, and by then they've already told everyone about the outage.
No renewal email has ever said “thank you for your excellent chaos tooling.” Customers reward the product. The resilience that protects it is expected, silent, and invisible when it works.
One bad outage undoes years of feature work. The story your customers retell is never “they have great tooling” it's “they were down for six hours.”
A GameDay isn't an engineering achievement to admire. It's how the product your customer depends on keeps its promise quietly, on a Tuesday, while you ship.
The GameDay was never for you. It's how your product keeps its promise.
Amazon uses that phrase for work that is heavy, unavoidable, and identical at every company. Payroll. Email. Laptops that turn on. Building it yourself never makes your company different it just makes you the ten-thousandth team to build the same thing, slower and with more bugs.
Resilience testing belongs on that list. Every serious team needs to know its systems survive failure. Almost no team should spend months building the machine that finds out because the machine is the same one every other team ends up with.
Failovers stay untested. Retry budgets stay uncounted. Runbooks stay hypothetical. The crack is already in your system you just haven't met it yet.
A genuine failure picks the time (3 AM Saturday), the scope (everything at once) and the audience (your customers). A scheduled GameDay takes all three away.
The engineers you hired for your product spend quarters writing dashboards for a fault-injection tool they'll use four times a year.
Plumbing is our problem. Product is yours.
⚠ Under construction planned content
Make the idea click for non-engineers (execs, buyers).
Side-by-side: time to first GameDay, cost, maintenance, safety features.
Social proof once we have beta users.