To grow a newsletter with Instagram, give people one finished reason to subscribe, then put your signup page where they already are: your bio link, a story link sticker and a comment keyword that sends the link by DM. Let people subscribe on your email tool's own form, so every address arrives with permission.

This plan works with any email tool. It names Substack, beehiiv and Kit because their own pages say what a new subscriber goes through, and every fact below carries the date we read it, 23 October 2026.

What does a newsletter need before Instagram can feed it?

Three things, ready before the first post:

  • A reason to subscribe that someone can name. The first issue, a short free guide, or a sample of what arrives each week. "Tips" is not a reason. "The Friday checklist" is.
  • A signup page that opens well on a phone. Substack, beehiiv and Kit all host one for you, covered below.
  • A welcome email. One message that says what comes next and how often.

Substack's own guide for Instagram writers, published 16 October 2023, tells people to link their full publication address in the bio so visitors land on a welcome page. The idea holds for any tool: send people to a page made for subscribing, not to a homepage.

Which parts of Instagram can send people to your signup page?

Four, each with limits Instagram sets:

  • Your bio link. Instagram's Help Center says a profile can hold up to five websites, so one can be your signup page. A visitor has to leave the post, open your profile and tap.
  • A story link sticker. Instagram's story guide, posted 2 July 2026, says the link sticker points to any web address outside Instagram and that anyone watching can tap it. Our story link sticker guide has the steps.
  • A comment keyword. Someone comments your word and receives the link by DM. Meta's rules allow one private reply per comment, sent within 7 days of the comment.
  • A story reply or a DM. Someone who writes to you can get the link back, and a reply has to go out within 24 hours of their message.

The keyword is the one that asks while the person is still on your post, which is why the next section goes deeper on it.

How does a comment keyword send people to your signup page?

Someone comments a word, the automation replies in public and sends the DM, and the DM carries your signup link. Four steps set it up:

  1. Choose a plain word. LETTER works, because the keyword ignores capital letters and fires when a word in the comment starts with it, so "letters" also counts. A keyword of one or two letters must be the whole word.
  2. Say it in the post. Put it in the caption and say it out loud in the reel: "Comment LETTER and I will send the first one."
  3. Write the DM like a person. Name what they asked for, say how often they will hear from you, and put the signup link on a button.
  4. Preview, then switch it on. inDM shows the exact DM before anything sends, and setup takes a few minutes. The comment-to-DM setup guide walks through it.

One detail from Meta's private reply page, updated 30 June 2026: the DM lands in the person's inbox if they follow you and in the Requests folder if they do not. People who do not follow you may open it a little later.

Send the signup link when the newsletter is the point, and ask for the address in the DM when a free thing is the point. The two routes differ in where the address lands and what the person agreed to.

With the signup link, the person subscribes on your email tool, and that tool's own confirmation step can run. With an email ask, the address lands on that person's contact in your DM tool, and you carry it to your email tool yourself. That path is shorter for the person and longer for you.

Our page on whether an email gate costs you clicks weighs that trade and shows how to test it on one automation. The collect emails use case shows the same two routes in three steps.

How do you grow an email list from Instagram without breaking your email tool's rules?

Import only people who agreed to your newsletter, and tell them in the DM what they will receive. The three tools say so in their own words:

  • beehiiv accepts a CSV file or a pasted list, and its import screen asks you to confirm that everyone knowingly consented and opted in to your newsletter. Its help article, updated 1 October 2026, says the email column needs a header of email, email address or emailaddress.
  • Kit says, in an article updated 25 June 2026, that everyone you import must have given permission to receive your marketing emails. It also says people imported into a form with double opt-in are confirmed automatically, so they get no confirmation email.
  • Substack lists subscriber import by CSV on its features page. Its Help Center blocked automated reading on 23 October 2026, so check its import rules there before you upload.

A person who typed an address to get a freebie has not necessarily agreed to a weekly newsletter. One sentence in the DM closes that gap.

Each hosts a signup page, and the details differ:

  • Substack. Its features page, which shows no date, lists a custom subscribe page, a welcome page you can customize and an automatic welcome email.
  • beehiiv. A Subscribe page lives at /subscribe on your site, per its help article updated 2 October 2026. The same article lists a default Link in bio page, "a mobile-friendly link in bio page for social platforms", in its Advanced Website Builder, which it says is on paid plans. Double opt-in is optional, and until a person confirms they get no emails, including the welcome email (updated 9 October 2026).
  • Kit. A landing page is "a standalone opt-in you can share anywhere", and you do not need a website or a blog, per its help article updated 15 October 2026. Double opt-in is its default setting, and the confirmation email can deliver a file, such as your freebie (updated 30 July 2026).

How do you track Instagram newsletter signups?

Give each placement its own link, so your tools can tell them apart. Add tags to the web address with the UTM link generator, one set for the bio, one for the story and one for the keyword DM, and read them in your email tool or your analytics. Substack's features page lists acquisition source tracking among its growth tools.

On the Instagram side, count how many people asked for the link, which your DM tool's analytics show. Set that next to your new subscribers: a big gap between people who asked and people who subscribed points at the signup form, not the DM.

What should the first email say?

Say what the person signed up for, how often it arrives and how to leave. In the United States, the FTC's CAN-SPAM guide (August 2023, edited January 2024) also asks for accurate sender details, honest subject lines, a valid postal address and an opt-out honored within 10 business days. Other countries set their own rules, and our page on Instagram newsletters covers the basics.

Where this stops working

  • Instagram gives you no email addresses. Meta's page on the user profile, updated 21 January 2025, lists a name, username, profile picture, follower count, whether the account is verified, and two follow flags, and no email address. Every address has to be given by the person.
  • A DM tool cannot message people who never contacted you. It also cannot schedule a DM for a set time, so it cannot send your issue to your followers. The newsletter itself goes out from your email tool.
  • We could not read Substack's Help Center. It blocked automated reading, so we say nothing about its confirmation or import rules beyond its features page.
  • Substack's Instagram guides are old. The ones Substack publishes are from 2022 and 2023, and Instagram has changed since.
  • We have no signup numbers. Any percentage you see for how many commenters subscribe is not one of ours.
  • Rules change. Each page above carries the date we read it.

Pick one placement, one keyword and one welcome email this week, and you have a newsletter that grows from the audience you already have.

Sources

Each page was read on 23 October 2026:

What's ours and what isn't. Nothing on this page is an inDM measurement. The plan is ours, and each rule or feature comes from the page named beside it.