Building a seed inbox for competitor email analysis

What a seed inbox shows you

A rival's welcome series, abandoned-basket reminders and promotional calendar never appear on its website. To see them, you have to receive them. A seed inbox is a mailbox you set up for the study and sign up to each brand you want to read.

Compared side by side, the emails show how much each brand relies on discounting, how quickly it asks for a sale, what it says about itself in the first few emails, and how hard it chases an abandoned basket. Plan your own flows with that sheet in front of you.

Setting up the inbox

• Use a dedicated business address, on your company domain or a business mail account, not a personal inbox. It keeps the study separate and traceable to your business.
• One inbox per study. Start fresh each time so old sign-ups do not muddy the results.
• Do not disguise who you are. You do not need to announce yourself, but do not invent a fake persona with false personal details to get special treatment.
• Turn off filtering where you can, so promotional mail is not hidden, and note the folder each email landed in.

Include your own brand. Your welcome email reads differently in the same inbox, on the same dates, as three rivals'.

Signing up: same date, same route

Sign up to every brand on the same date and, as far as possible, by the same route. If one brand offers a pop-up with a first-order discount, use it; if another only has a footer form, use that, and note the difference. The sign-up experience is a finding in itself.

1. Visit each brand's homepage as a new visitor.
2. Record what sign-up offer is shown, where and when it appears.
3. Sign up with the seed address and note the exact date and time of day.
4. Screenshot the confirmation page and any confirmation email.

Signing up on the same date matters because email programmes change with the season. If you join one brand during its sale and another in a quiet week, you are comparing calendars, not strategies.

The test basket, carefully

Abandoned-basket emails only fire when someone adds products to a basket and leaves. To see them, you can add an item to the basket while signed in or identified with the seed address, then leave without buying.

Do this only where it creates no real order and costs the rival nothing. Do not complete checkout, do not reserve stock that others cannot then buy, do not book appointments or request quotes that someone will have to prepare, and do not trigger anything that sends a physical sample. If a site would create a pending order or hold stock, skip the test for that brand and note why.

Use the same kind of basket at each brand: a typical single product near your own average order value is a sensible default. Our cart recovery tool helps you think about your own abandoned-basket flow once you have seen the rivals'.

What to record for every email

Set up a simple sheet with one row per email received:

• Brand
• Date and time received
• Subject line and preview text
• Flow position: welcome, abandoned basket, browse reminder, promotional, post-sign-up survey, other
• Offer, if any, and its mechanic (money off, percentage off, free delivery, gift)
• Discount depth, written as the brand states it
• Whether the offer has an expiry or urgency line
• Main message: product, story, social proof, education
• A screenshot or saved copy

Keep the sheet factual. Write the offer exactly as the brand states it, including any conditions such as a minimum spend or excluded ranges, so you are comparing like with like when you read across brands later.

Over the study, patterns appear: the send-time pattern each brand favours, how many welcome emails arrive before the first hard sell, whether discount depth increases as the basket reminders go on, and how often promotional emails land.

How long to run it, and unsubscribing

Leave the inbox running for the length of the longest welcome and abandoned-basket flows you are studying, so you see each one through to the end, plus enough regular promotional mail to see the rhythm. You will know a flow has ended when the triggered emails stop and only regular campaigns remain.

When the study is done, unsubscribe from every brand using their own unsubscribe link, and close or archive the inbox. Do not keep collecting indefinitely, and do not share the mailbox or its contents outside the people doing the analysis.

Turning it into findings

Read the sheet brand by brand, then theme by theme. Typical observations are the brand that discounts in its very first email, the brand that tells a founder story before it sells anything, and the brand with no abandoned-basket email at all. Write them as observations, not conclusions about what works: you cannot see open rates or revenue from the outside. Then pick one or two ideas to test in your own flows and record the result. For turning these into an action plan, see turning findings into a 30/60/90 plan.