How to value an email list, on its own or inside a business

A list of addresses earns nothing by existing. It earns when people on it open, click and buy, and the share who do varies enormously from one list to another. Lists grown through giveaways, bought sign-ups or a pop-up on unrelated traffic can be large and nearly silent. A small list of people who asked for exactly what the business sells can carry most of its revenue.

So value the list on what it earns — revenue you can trace to sends, after the cost of the email platform and of whoever writes the emails — and treat the subscriber count as context. That is the same rule that makes a profit multiple more useful than a revenue one.

• Clicks over opens. Open rates have been unreliable since mail apps began loading images automatically on the reader's behalf — Apple's Mail Privacy Protection, introduced in 2021, is the best-known example — which records an open whether or not anyone read the email. Clicks still require a person.
• How many recently engaged. Ask for the number of subscribers who clicked at least once in the last 90 days, from the email platform's own reports. That is closer to the real list size than the total.
• Revenue per send, traced. Sales attributed to emails should show up in the store's orders or the affiliate and sponsor statements, with dates that line up with sends. How to verify a seller's revenue and profit covers the records.
• Where sign-ups come from. If most new subscribers arrive through one search page or one social account, the list's growth inherits that channel's risk — see valuing an online business that depends on search traffic.
• Unsubscribes and complaints. A rising unsubscribe or spam-complaint rate after each send is a list being worn out, and it eventually harms delivery to everyone else on it.

This is where many list sales go wrong, and it is a legal and practical question as much as a valuation one:

• Consent. Subscribers signed up to hear from a particular sender about a particular thing. Whether that consent carries over to a buyer depends on the rules where the subscribers live and on what the sign-up form said. Read the form and the privacy policy the list was collected under, and take legal advice for any list of real size.
• The email platform's own rules. Many email services restrict importing a list the account holder did not collect. Read the acceptable-use terms of the platform you intend to use — transferring the seller's existing account, where the platform allows it, can avoid the question.
• Sending reputation. Deliverability is tied partly to the sending domain and its history. A list that moves without the domain it was sent from can land in spam folders for a while. Buy the domain with the list where you can.
• The writer. If readers stay for the seller's voice, part of what earns is the seller. Valuing an owner-dependent online business covers costing that.

Transferring an online business after the sale has the rest of the handover checklist.

Most lists change hands as part of a store, content site or app rather than alone. There, the list is not priced separately: it is one reason the business's earnings are more or less durable. A store whose repeat orders come through its own emails has revenue no ad auction or ranking change can take away, which can justify placing it higher in its comparable range.

A standalone newsletter is priced on its own earnings — sponsorships, paid subscriptions, affiliate income — and our sold data on those is thin, as the table below shows.

Each sale in our database records a sold price, an asset type and, where the source stated them, one annual profit and one annual revenue figure. We do not record subscriber counts, engagement or how much revenue came through email, so we publish no price-per-subscriber figure — and we would be wary of anyone who quotes one without saying which sales it came from.

The table shows how many sales we hold of each type and whether there are enough with a stated profit to give a median. Newsletters are tracked as their own type; a median is withheld below five comparables rather than estimated.

Counts cover every non-demo sold deal of that type. A median is withheld (shown as a dash) below five comparables with a stated profit.