Let me start with the single fact that should make you sit up, because almost every link builder has missed it: every link in a Substack newsletter is dofollow. Automatically. There’s no setting to change it, no nofollow tag, no ugc attribute. When a Substack writer mentions and links your site, full link equity flows straight to you — from a platform with 35+ million active readers that most SEOs still file under “social media.”
Sit with that for a second, because it inverts everything you’ve been told about community and social link building. Reddit links? Nofollow. Quora links? Nofollow. Forum links? Nofollow. Most of the “new” link channels everyone’s writing about in 2026 hand you links that pass no PageRank, and the entire strategy becomes about mentions and indirect effects. Substack is the exception that nobody’s shouting about: it gives you genuine, equity-passing, editorial dofollow links — the exact kind that actually move rankings — from real publications with real, engaged audiences.
And here’s why it’s underrated rather than just “good”: Substack exploded into a major publishing ecosystem with built-in growth mechanics — Recommendations, Notes, cross-posts — that make newsletter writers easier to reach, easier to build relationships with, and more motivated to reference each other than any other platform. So you’ve got dofollow links, a huge engaged readership, and a structure practically designed for collaboration, and most link builders are walking right past it because the word “newsletter” doesn’t sound like “link building.”
This guide fixes that. We’ll cover exactly why Substack links are special, the dofollow mechanics and the one big caveat, how to actually earn newsletter links (both on Substack and beyond), how the recommendations and Notes ecosystem multiplies your reach, the AI-citation angle that makes newsletters matter more every month, and how to measure it. For where this sits in your wider strategy, our community and social link building hub is the umbrella this article expands, and the tactics here pair naturally with everything else in your link programme.
Why Substack links are different (and special)
I want to be precise about what makes this channel unusual, because the precision is the whole opportunity.
The dofollow fact
On Substack, all outbound links in a newsletter are dofollow by default. The platform doesn’t apply nofollow or ugc attributes to the links writers include in their posts. So when a Substack publication mentions your site, your tool, your study, or your article and links to it, that link passes link equity exactly like an editorial link from any blog would. This is genuinely rare among the “social” and “community” platforms — and it’s why lumping Substack in with Reddit and Quora as “nofollow social channels” is a category error that’s costing people links.
Think about what that means in practice. A single mention in a respected niche Substack isn’t just a brand impression or a trickle of referral traffic — it’s an editorial dofollow backlink from a relevant, authoritative publication, the type of link that dofollow-vs-nofollow analyses consistently show is what actually drives ranking improvements. You’re getting the link type that does the heavy lifting, from a source that’s also sending you a wave of engaged, qualified readers. That combination is exactly what makes a link valuable, and Substack hands it to you in a package most people aren’t even looking at.
Compare the effort math against traditional editorial link building for a moment. To earn a dofollow editorial link the conventional way, you typically identify a relevant blog, craft a cold pitch, follow up, and hope an editor who’s never heard of you decides to link — a low-yield grind. On Substack you’re pursuing the same prize, a dofollow editorial link from a relevant publication, but through a platform whose entire social layer is built to help writers discover and reference each other, with audiences that are often more engaged than a typical blog’s. Same link type, warmer path, better audience. When you frame it that way, ignoring Substack starts to look like leaving free editorial links on the table — which is exactly what most link builders are unknowingly doing.
The one big caveat: custom domains
Here’s the nuance the lazy “Substack is dofollow!” takes skip, and you need it. The dofollow benefit applies to links going out of Substack newsletters to other sites — that’s what you want when another writer links to you. But if you run a Substack as your own publication and you’re hoping it builds authority for your main website, understand the domain situation. A default Substack publication lives on a yourname.substack.com subdomain, so the authority you build accrues partly to Substack’s domain, not yours. If you want the SEO equity of your own Substack to flow to your brand, you’d typically connect a custom domain — which gives you control and lets all your backlinks and brand mentions point at your URL rather than Substack’s, though a brand-new domain starts without the borrowed authority the subdomain gave you.
So hold two distinct plays in your head, because they’re different: (1) earning dofollow links from other people’s Substacks pointing at your site — pure win, this is the main event; and (2) running your own Substack as an owned asset — valuable for audience and brand, but mind the domain mechanics if SEO equity to your main site is the goal. Most of this guide is about play one, because that’s where the underrated link-building opportunity lives.
The audience and ecosystem behind the link
A link is only as good as the source behind it, and this is where Substack quietly outclasses most channels.
Substack isn’t a link farm or a directory — it’s a publishing ecosystem with tens of millions of active, engaged readers who chose to subscribe to specific writers because they trust them. That trust is the asset. When a newsletter writer your audience respects mentions you, it carries the weight of a personal recommendation from a trusted voice to a captive, opted-in audience. That’s a fundamentally higher-quality endorsement than a link buried in a generic blog post nobody reads, and it’s why newsletter mentions convert so unusually well.
There’s also the ecosystem’s built-in growth machinery, which matters enormously for link building because it determines how reachable and collaborative the writers are. Substack’s whole design encourages writers to promote and reference each other: Recommendations let writers suggest other publications to their readers, Notes is a social feed where writers share and amplify each other’s work and links, and cross-posts let a writer republish and comment on another’s piece to their own audience. These features drive a huge share of the platform’s subscriptions — collaboration isn’t a side activity on Substack, it’s the primary growth engine. For a link builder, that means you’re entering an environment where writers are actively looking for good people and good content to reference, because referencing each other is how they all grow. The platform has pre-disposed your targets to want what you’re offering.
How to actually earn Substack and newsletter links
Now the practical part. There are several distinct routes, and the best programmes use more than one. None of them is “spam your link into the comments” — Substack links come from relationships and genuinely reference-worthy content, exactly like the best editorial links always have.
Route 1: Get mentioned in others’ newsletters
The core play. Newsletter writers constantly need things to reference — data to cite, tools to recommend, guides to link, examples to feature. Your job is to be the obvious thing they reach for, and then to be on their radar. That breaks into two parts.
First, be worth mentioning. This is where Substack link building connects to the rest of your programme. A strong linkable asset — original research, a free tool, a definitive guide, a striking data point — gives newsletter writers a concrete, valuable reason to link you. Writers especially love original data and useful tools because those make their newsletter more valuable to their readers. Build the thing first; the link follows much more easily.
Second, get on their radar and pitch well. Substack makes the writers unusually reachable — you can engage with them directly through Notes, comments, and the platform’s social layer, building familiarity before you ever pitch. When you do reach out, it’s warm rather than cold, and you’re offering something genuinely useful to their audience rather than asking for a favour. Our outreach guide covers the pitch craft; the difference on Substack is that the relationship-building step is built into the platform.
Route 2: Reclaim unlinked newsletter mentions
This is the highest-ROI, lowest-effort play and almost nobody does it for newsletters specifically. Newsletter archives — including Substack’s — frequently mention brands, tools, and studies without linking them. These pages often rank well and carry strong topical relevance, which makes them prime targets. Find where your brand is mentioned in a newsletter without a link, reach out to the writer, and simply ask them to add the link. Success rates are high because the content is already written and they already chose to mention you — you’re just asking them to complete the reference. And remember: on Substack, that newly added link is dofollow. This is a direct application of the discipline in our brand mentions and unlinked citations guide, pointed specifically at the newsletter surface everyone overlooks.
It’s worth dwelling on why this route is so efficient. The hardest part of earning any link is convincing someone you’re worth referencing — and with an unlinked mention, that battle is already won. The writer chose to mention you; they just didn’t hyperlink it, often because they were writing quickly or didn’t have your URL handy. So your outreach isn’t a pitch, it’s a favour that helps them too: “thanks for the mention, here’s the link in case you’d like to add it for your readers.” That framing has a high success rate because it costs the writer almost nothing and makes their content marginally more useful. Scan newsletter archives in your niche periodically, and on the Substack ones in particular, every reclaimed mention converts a free shout-out into a free dofollow link. Few link builders systematically work the newsletter surface for this, which is precisely why the opportunity is still wide open.
Route 3: Guest write and cross-post
Many Substack writers welcome guest contributions or collaborations, and the platform’s cross-post feature lets writers share each other’s posts with commentary to their own audiences. A guest piece or a cross-posted collaboration naturally includes links back to you, and because the relationship is genuine and the content is valuable, these are clean editorial links. This overlaps with traditional guest posting, but the newsletter context adds the engaged-audience and dofollow advantages on top.
Route 4: Become a source for newsletter writers
Position yourself as the go-to expert newsletter writers turn to for quotes, data, and commentary in your niche. When you’re the person whose insight makes their newsletter smarter, you get referenced repeatedly over time — not a one-off link but a recurring relationship that produces mentions across many issues. This is the compounding version of the channel, and it’s built on the same be-genuinely-useful foundation that every relationship-driven link tactic runs on.
The practical way to become that source is to make yourself easy to cite and consistently worth citing. Publish your data and insights openly, respond fast and helpfully when a writer reaches out, and proactively offer writers useful angles or fresh numbers around topics they cover — not pitches for your product, but genuinely useful material for their readers. Writers remember the source who made their last issue better and come back to that source again and again. Over a year, a single writer who treats you as their go-to expert in your niche can produce more links and mentions than a dozen cold pitches, because each issue is another opportunity for them to reference you. That recurring, relationship-based citation is the quiet engine behind the most durable newsletter link programmes, and it’s available to anyone willing to be reliably, genuinely useful.
The Notes and Recommendations multiplier
Here’s the part that turns a single newsletter link into something much bigger, and it’s unique to how Substack works.
When you earn a mention or build a relationship with a Substack writer, you’re not just getting one link on one page. You’re plugging into an amplification network. If a writer references you in a post, that post can be shared through Notes (where it reaches other writers and readers who can re-share it), it can be cross-posted by other writers who add their own commentary and links, and the writer might add you to their Recommendations — which surfaces you to their readers repeatedly in the subscribe flow and automated emails. One genuine relationship with an active Substack writer can ripple into mentions, links, and exposure across a whole cluster of connected publications, because the platform is built to make writers amplify each other.
This is why the relationship-first approach pays off so disproportionately here. A cold, transactional link request gets you, at best, one link. A genuine relationship with a respected writer in your niche plugs you into their network — their recommendations, their cross-posts, their Notes audience, and the other writers they’re connected to. The link you earn is the doorway; the network behind it is the prize. Treat Substack writers as long-term relationships rather than link targets, and the amplifier does work that no amount of one-off outreach could match.
There’s a practical implication: spend real time in the ecosystem. Engage genuinely on Notes, comment thoughtfully on posts you actually read, share other writers’ work, and become a recognised, liked presence among the writers in your niche. The same relationship-first logic that governs every community channel applies here, with the bonus that the relationships produce dofollow links and tap into a built-in amplification engine.
The AI and discoverability angle
This is the 2026 layer that makes newsletters matter more every month, and it’s the flag this article plants that competitors haven’t connected.
The biggest publishers and SEO leaders have all converged on the same realisation: link building is no longer just about optimising for Google PageRank — it’s about discoverability across search, AI, social, and forums all at once. AI answer engines pull their answers directly from the web, and they’re not selecting sources purely on classic link metrics. Some of the most valuable brand mentions in 2026 aren’t even clickable — what matters is your brand appearing, in relevant context, in trustworthy content that shapes how both humans and AI models understand your space.
Newsletters are a near-perfect surface for this. A niche Substack that recommends your tool or cites your data is exactly the kind of relevant, trusted, contextual mention that influences AI responses and brand perception — the new playbook explicitly names niche newsletters as one of the meaningful contexts to be present in. And there’s a concept called co-occurrence or co-citation that makes this even more powerful: when your brand name repeatedly appears alongside your key topics and alongside other respected names in your category, search engines and AI models learn to associate you with that subject and that peer group, even when the mention is unlinked. Newsletters, with their topical focus and trusted-voice framing, generate exactly this kind of high-value co-occurrence.
So Substack and newsletter links give you a rare triple: dofollow equity that helps classic rankings, engaged referral traffic that converts and signals quality, and the trusted contextual mentions that increasingly drive AI visibility. Most channels give you one of those. Newsletters give you all three. If AI visibility is a priority for you — and in 2026 it should be — our AI search visibility hub covers the full picture, and newsletter presence is one of its most underused levers.
Beyond Substack: the wider newsletter opportunity
Substack gets the headline because of its dofollow links and ecosystem, but the broader newsletter channel is worth your attention too, with one important distinction.
Newsletters outside Substack — independent email newsletters, company newsletters, curated roundups — are a huge and growing surface, and they share Substack’s best qualities: trusted voices, engaged opted-in audiences, and strong topical relevance. The distinction is the link mechanics. Where Substack links are reliably dofollow, links in other newsletters and on other platforms may be nofollow, and crucially, links that only appear in the emailed version of a newsletter aren’t crawlable at all — only the web-archive version of a newsletter contributes a crawlable link. So when you pitch non-Substack newsletters, aim for a mention in the web-published archive of the issue, not just the email blast, if SEO equity is a goal.
But don’t over-index on the link mechanics, because the new-playbook value of newsletters extends well beyond the link. A mention in a respected niche newsletter — Substack or not, dofollow or not — puts your brand in front of a trusting, high-intent audience, generates the contextual co-occurrence that feeds AI and entity signals, and frequently produces secondary effects: a newsletter mention gets seen by bloggers and journalists who then write about and link to you from their own sites. The newsletter is often the spark that lights editorial links elsewhere. So treat the whole newsletter ecosystem as a priority channel, lead with Substack for its dofollow advantage, and value the rest for the audience, the co-occurrence, and the downstream links they reliably produce.
Common mistakes that waste the opportunity
Let me save you from the errors that keep people from getting the most out of this channel.
Filing Substack under “nofollow social.” The single biggest mistake, because it means you never pursue the dofollow links sitting right there. Substack links are dofollow; treat the platform as the editorial-link opportunity it is.
Cold, transactional pitching. Substack’s whole value is its relationship ecosystem. Firing cold link requests at writers ignores the warm, built-in relationship layer that makes the channel work. Engage first, pitch warm.
Having nothing worth mentioning. Even warm relationships need something to link to. Without a genuine linkable asset — data, tool, definitive guide — you’re asking writers to reference nothing. Build the thing first.
Ignoring unlinked mentions. Newsletter archives are full of unlinked brand mentions that are easy, high-success-rate links to reclaim. Skipping this is leaving the lowest-hanging fruit on the tree.
Only chasing the email, not the archive. For non-Substack newsletters, a link that only appears in the email isn’t crawlable. Aim for the web archive version if you want SEO equity.
Treating it as one-and-done. The channel’s biggest returns come from ongoing relationships and the Notes/Recommendations amplifier, not single links. Build relationships, not transactions.
Measuring only dofollow links. You’d miss the referral traffic, the co-occurrence, the AI-citation value, and the downstream editorial links. Measure the full picture.
How to measure newsletter link building
Because the value spans dofollow equity, audience, and AI signals, measure across all of them rather than counting links alone.
Dofollow links earned. The core, trackable output — editorial dofollow links from Substack and crawlable newsletter archives pointing at your site. Quality and relevance over raw count, as always.
Referral traffic and conversion. Newsletter audiences are engaged and trusting, so the traffic converts unusually well. Judge it on conversion and lead quality, not just volume.
Brand mentions and co-occurrence. How often your brand appears in newsletters, linked or not, and whether it’s appearing alongside your key topics and respected peers. This feeds both entity authority and AI visibility.
AI citation presence. Whether AI answer engines reference or recommend you for target queries, and whether that improves as your newsletter presence grows — the 2026 payoff metric.
Relationship and amplifier health. How many genuine writer relationships you’ve built and whether they’re producing compounding returns through Recommendations, cross-posts, and Notes amplification. A healthy newsletter channel accelerates over time.
Downstream editorial links. The links from blogs and publications that trace back to a newsletter mention — the spark-to-fire effect showing up in your data.
Plot these over months, because newsletter relationships compound. For tying it back to commercial outcomes and comparing against your other channels, our link building ROI guide is where this should ultimately be judged.
A worked example: one study, a dozen links
Let me make the whole strategy tangible, because the compounding is hard to picture in the abstract.
Say you run a small B2B tool and you publish a piece of original research — a benchmark or survey nobody else has, built from your own data. On its own, that’s a linkable asset that earns links across the web. But watch what the newsletter channel does with it.
You spend a few weeks beforehand being genuinely present on Notes in your niche — sharing useful things, commenting thoughtfully, becoming a recognised name among the writers who cover your space. When the study drops, you don’t cold-blast it. You share it where those writers will see it, and you reach out warmly to the handful you’ve built rapport with, framed entirely around how the data makes their next issue more valuable to their readers.
One respected niche Substack cites your study with a dofollow link. That post gets shared on Notes, where two other writers see it. One cross-posts it with their own commentary — another dofollow link and another engaged audience. The original writer adds you to their Recommendations, surfacing you to their subscribers repeatedly. A second newsletter, seeing the data circulating, references it in their own issue. Meanwhile a blogger who reads one of those newsletters writes an article citing your benchmark and links from their own site — a dofollow editorial link that exists only because the newsletter sparked it. And when someone asks an AI assistant about your topic, your brand and your data are now sitting in multiple trusted, topical contexts that the models draw from.
One study, written once, produced a cluster of dofollow links across connected publications, repeated brand-and-topic co-occurrence, a wave of qualified referral traffic, downstream editorial links elsewhere, and AI-citation presence. That’s the newsletter amplifier working as designed — and it happened because you’d done the relationship groundwork first and had something genuinely worth citing. The transactional version of this — cold-pitching the same study to strangers — might have produced one link. The relationship-and-ecosystem version produced a dozen touchpoints. That gap is the whole reason this channel is worth doing properly.
Running your own Substack as an owned asset
Most of this guide is about earning links from other people’s newsletters, because that’s the underexploited opportunity. But running your own Substack deserves its own treatment, because it’s a powerful complementary play with a few mechanics worth getting right.
Your own newsletter is an owned audience — people who opted in to hear from you, which is one of the most durable marketing assets there is. From a link-building and authority standpoint, it does several things. It establishes you as a credible voice in your niche, which makes every other relationship and pitch easier. It gives you a natural home for your linkable assets and a direct line to promote them. It plugs you into the Recommendations and cross-post ecosystem from the inside, so you can build reciprocal relationships with other writers as a peer rather than an outsider. And it generates the kind of consistent, topical content that earns its own mentions and links over time.
The one mechanic to get right is the domain question covered earlier. If you run on the default subdomain, the search authority your newsletter earns accrues partly to Substack rather than to your main brand. If building SEO equity for your primary website is a goal, connecting a custom domain lets that authority and those backlinks point at your URL — at the cost of starting the domain’s authority fresh. Many brands run their Substack primarily for audience, relationships, and brand rather than direct SEO equity, which is a perfectly good reason to use it even on the subdomain. Just be clear about which goal you’re optimising for, because it changes the setup.
The ideal setup for a serious programme: run your own Substack to build audience, authority, and ecosystem relationships, and run the earn-links-from-others play in parallel. The two reinforce each other — being a respected writer in the ecosystem makes other writers far more willing to reference and amplify you, which is exactly the relationship advantage the whole channel runs on.
Substack vs the other community channels
Since Substack keeps getting lumped in with Reddit, Quora, and forums, it’s worth a clear comparison, because the differences determine how you should weight your effort.
The defining contrast is the link type. Reddit, Quora, and most forums hand you nofollow links, so the entire strategy there is about mentions, referral traffic, and indirect effects — the link itself passes no equity. Substack is the outlier: its links are dofollow, so you get genuine ranking-moving equity on top of all the mention and traffic value. That single difference makes Substack the most SEO-direct of the community channels by a wide margin.
The audience differs too. Reddit and forums are largely anonymous and community-first; Quora is question-and-search-first; Substack is trusted-voice-first, where a named writer your audience already follows vouches for you to an opted-in subscriber base. That trusted-recommendation framing makes Substack mentions convert and carry weight in a way anonymous-platform links rarely do.
What unites all of them — and the reason to run several — is the 2026 reality that they all feed AI visibility and brand co-occurrence, and they all produce downstream editorial links when you participate genuinely. So the smart play isn’t Substack instead of the others; it’s Substack as the dofollow-and-trust anchor of a community portfolio that also includes the nofollow-but-valuable platforms. Each plays a role; Substack’s role is uniquely the one that also moves classic rankings directly.
Frequently asked questions
Are Substack links dofollow or nofollow?
Outbound links in Substack newsletters are dofollow by default — the platform doesn’t apply nofollow or ugc attributes to the links writers include. So a mention-with-link from a Substack publication passes link equity like any editorial blog link, which is what makes the platform unusually valuable among community and social channels. The one nuance: if you run your own Substack on the default subdomain, the authority it earns accrues partly to Substack’s domain unless you connect a custom domain.
Is Substack good for SEO?
Yes, in two distinct ways. Earning dofollow links from other Substacks pointing at your site directly helps your rankings and sends engaged, converting traffic — that’s the main opportunity. Running your own Substack builds audience, authority, and ecosystem relationships, though you’ll want a custom domain if you want its SEO equity to flow to your main brand rather than to a Substack subdomain.
How do I get links from newsletters?
Build something genuinely worth referencing (original data, a tool, a definitive guide), get on writers’ radars through Substack’s built-in social layer (Notes, comments, cross-posts), and reach out warmly with something useful for their audience. Also reclaim unlinked mentions in newsletter archives — those are high-success-rate, easy links, and on Substack they’re dofollow. Guest writing and becoming a go-to source for writers round out the approaches.
Do newsletter links count if they’re only in the email?
Not for SEO. A link that appears only in the emailed version of a newsletter isn’t crawlable. Only the web-published archive version of a newsletter contributes a crawlable, equity-passing link, so aim for a mention in the web archive if SEO value is your goal. The email still has value for traffic and brand exposure, but the crawlable archive is what helps rankings.
Is Substack better than Reddit or Quora for link building?
For direct SEO equity, yes — Substack links are dofollow while Reddit, Quora, and most forums are nofollow. But they’re complementary, not competing. Substack gives you ranking-moving dofollow links plus trusted-voice endorsement; the nofollow platforms give you reach, referral traffic, and AI-feeding mentions. A strong programme uses Substack as the dofollow anchor alongside the others.
How long does newsletter link building take to work?
It’s a relationship-driven, compounding channel, so expect a build rather than an instant hit. You invest time being genuinely present in the ecosystem and creating reference-worthy content, then relationships and links start flowing and accelerate over time as the Recommendations and Notes amplifier kicks in. The biggest returns come from sustained presence, not one-off outreach.
The bottom line
Substack and newsletter links are underrated for one simple reason: people hear “newsletter” and “social platform” and assume nofollow, low-value, not real link building. They’re wrong on every count. Substack hands you genuine editorial dofollow links — the kind that actually move rankings — from a 35-million-reader ecosystem built around writers referencing and amplifying each other, with engaged audiences that convert and a structure practically designed for collaboration. Add the broader newsletter surface and you have a channel that delivers dofollow equity, qualified traffic, and the trusted contextual mentions that increasingly drive AI visibility, all at once.
The way to win it is the way you win every relationship-driven channel, with a dofollow bonus on top: build something genuinely worth mentioning, get on writers’ radars through the platform’s built-in social layer, reclaim the unlinked mentions sitting in newsletter archives, guest write and cross-post, become the source writers turn to, and treat every writer as a long-term relationship that plugs you into their amplification network rather than a one-off link. Lead with Substack for its dofollow advantage, value the wider newsletter ecosystem for audience and co-occurrence, and measure the full picture rather than just the links.
While everyone else fights over the same nofollow community links and the same crowded editorial targets, the newsletter channel sits there with dofollow links, engaged audiences, and an AI-visibility bonus, largely unexploited. That’s the definition of underrated — and the definition of an opportunity worth taking before the rest of the industry catches up.
To build this into a complete programme, start from the community and social link building hub, pair it with brand mentions and AI search visibility, create the linkable assets that give writers something to reference, and run your warm newsletter relationships through your outreach process so a single mention compounds across the whole ecosystem.
