KERNEL moves from access protection to hands-on product education. A personal founder welcome leads into a seven-email onboarding sequence that introduces one browser capability per day from day 2 through day 6.
Automated emails sent in order, on a timeline.
Standalone emails first, then the emails from its sequences, each in the order they arrived.
Updated Oct 3, 2026
The first message is an account verification email on day 0: "563877 is your verification code". Its preview text is equally direct: "Your Kernel verification code". It confirms the recipient’s email address and protects account access.
A second day 0 email changes the tone. "🙋♀️ Saw your sign up on Kernel" comes from a co-founder, speaks personally, and invites the recipient to connect with the team. The next message, "welcome to kernel", gives the product context and asks the recipient to create a first browser.
After the welcome email on day 1, KERNEL sends an onboarding email on each day from day 2 through day 6. The sequence moves through stealth mode, observability, managed authentication, browser pools, and reusable browser profiles. Each message focuses on one product feature and includes a related next step, such as improving browser automation, debugging sessions, setting up authentication, creating a pool, or preserving browser state.
The emails ask the recipient to create a browser, follow guidance about stealth mode and related controls, set up authentication, create a browser pool, or create a reusable profile. The sequence therefore moves from initial browser setup into additional browser infrastructure capabilities rather than repeating the welcome email’s introduction.
Founder voice appears in the personal welcome and all six product-education emails. KERNEL uses concise, lowercase subject lines for feature lessons, including "stealth mode on kernel to access more websites", "observability on kernel", and "auth for agents". The verification subject is functional, while the personal welcome has the only subject-line emoji: "🙋♀️ Saw your sign up on Kernel".
Social proof appears in the welcome, stealth mode, observability, and authentication emails. Customer testimonials support the debugging and authentication content, while the welcome email introduces browser infrastructure and previews the learning path. Single calls to action appear in the welcome, stealth mode, authentication, scaling, and browser-memory emails. Plain text appears in the welcome, authentication, scaling, and browser-memory emails.
How often, when and how KERNEL emails its subscribers, measured from every email we received.
Every email KERNEL sent in its first month, grouped by the day it arrived.
Day 0
Signup day
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
Every subject line and preview text, in the order they arrived.
