Resources → Teardowns

Behavioral Autopsies of Real Lifecycle Systems.

We take companies known for retention and reverse-engineer how their lifecycle infrastructure actually works — onboarding flows, re-engagement triggers, deliverability posture, and the revenue math behind it all.

In Progress

More systems. More findings. Same depth.

Each teardown follows the same forensic methodology — real email captures, trigger logic mapping, deliverability posture analysis, and revenue impact scoring. Subscribe to The Perennus Letter to get each one the day it drops.
Canva
Coming Soon
Figma
Coming Soon
Duolingo
Coming Soon
Slack
Coming Soon
Testimonials

What clients actually say.

"Isaac identified issues in our lifecycle infrastructure we'd been missing for months. The improvement was immediate and measurable."

Genevieve Bellaire
Genevieve Bellaire
Founder, Realworld
★ ★ ★ ★ ★

"What impressed me most was the depth of his thinking around retention. Instead of jumping straight into tactics, he analysed our entire customer journey and connected that with lifecycle messaging in a way that made complete sense."

Monica Anyango
Monica Anyango
Founder, Simplicity & Productivity Co.

"Isaac turned what felt like a messy problem into a clear system. He mapped our onboarding journey, showed us exactly where users were dropping off, and delivered email flows ready to launch immediately."

Abimbola Ajibade
Abimbola Ajibade
Co-founder, Kitov Consult
Nathan Barry, Founder of Kit, responding to a Perennus lifecycle teardown on LinkedIn

From a single workspace scan: 66,000 contacts analyzed. 32% invalid emails identified. 74% inactive contacts flagged. A broken behavioral trigger silently queuing 174,000 emails — zero delivered. That same diagnostic framework now runs inside Perennus, automatically, every 6 hours.

Before — Deliverability Breakdown
Customer.io deliverability report showing 56.3% Gmail bounce rate, 80.8% Yahoo bounce rate
After — Deliverability Restored
Customer.io deliverability report showing 2.1% Gmail bounce rate, 0% Yahoo bounce rate
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New teardowns drop in The Perennus Letter first.

Teardowns of real companies and their lifecycle systems. Automation architectures you can steal. Operator-level insights you cannot Google. Every Tuesday.