lemlist: What It Is and How It Works

lemlist is a multichannel sales engagement platform: it sends email, LinkedIn actions, calls, SMS and WhatsApp from one sequence, instead of running each channel in a separate tool. It started as an email-only app and grew into a full outbound platform with its own lead database, warm-up engine and AI writing help. The rest of this guide covers what it actually does, how to set up a first campaign, and how we run it for clients.

The lemlist links in this guide are partner links: we may earn a commission if you sign up, at no extra cost to you. Our verdict does not depend on them.

Five steps, in the order lemlist expects them.

Step 1

Connect your senders

Email mailboxes and the LinkedIn account that will send. Let lemwarm run before any real volume goes out.

Step 2

Import your leads

From a CSV, a CRM, lemlist's own lead database, or a list built elsewhere (Clay, a scrape, a trade-show export).

Step 3

Build the sequence

Add steps one at a time: an email, a LinkedIn visit or invite, a call task, a delay, a condition that branches on what the lead did.

Step 4

Personalize each step

Variables, dynamic images and the AI panel draft a first pass; a human still checks every line before launch.

Step 5

Launch and read the inbox

Preview the run for the real lead count, launch, then work replies from the unified inbox, not five separate tabs.

What is lemlist?

lemlist is a sales engagement platform built for B2B outbound. On its own site, lemlist describes itself as the platform for making outbound work: one place to find leads, write a sequence, and send it across several channels instead of one. It is not an email-only tool anymore. The email root is still there (lemlist was built for cold email first), but the current product adds LinkedIn actions, phone calls, SMS, WhatsApp, a lead database, and an email warm-up engine under the same subscription.

The closest way to place it: lemlist replaces three or four separate tools (a cold email sender, a LinkedIn automation tool, a warm-up service, and a chunk of a lead database) with one sequence builder that reads replies from every channel in a single inbox.

What can you actually do with lemlist?

Four things carry most of the product, and they show up in every lemlist review for a reason: they are genuinely what people use it for.

Multichannel sequences. A single sequence can mix an email step, a LinkedIn profile visit, a connection request, a LinkedIn message, and a call task, with delays and conditions between each one. The sequence branches on what actually happened (did the lead open the email, accept the invite, click a link), not on a fixed calendar.

A lead database. lemlist's own site lists a database of over 650 million contacts, searchable by filters similar to a sales intelligence tool, so a campaign can start from leads found inside lemlist rather than imported from somewhere else.

lemwarm, the warm-up engine. Every seat includes lemwarm, which exchanges real emails with a network of other real inboxes so a new or under-used mailbox builds sender reputation before a campaign puts volume through it.

Personalization beyond a first name. Variables fill in company and role details automatically; dynamic images and custom landing pages go a step further by changing a picture or a page per recipient, which is the detail most lemlist reviews point to as the platform's real differentiator.

How to set up your first campaign, step by step

The figure above gives the order; here is what each step actually involves inside the app.

Start by connecting senders: at least one mailbox, and a LinkedIn account if the sequence will use LinkedIn steps. A brand-new mailbox needs lemwarm running for a few weeks before it carries real campaign volume; skipping this is the single most common reason a first campaign underperforms.

Next, build the lead list. lemlist accepts a CSV import, a CRM sync (HubSpot, Salesforce, Pipedrive), a manual entry, or leads pulled straight from its own database. A list built somewhere else, in Clay for example, imports the same way a CSV does.

Then write the sequence. Inside the campaign, each added step is an email, a LinkedIn action, a call task, a delay, or a condition. A condition is what makes the sequence smart rather than a fixed drip: a lead who has not accepted the LinkedIn invite after a set number of days can be routed to a different email than a lead who has.

Personalization happens at the step level, not as an afterthought: variables, an uploaded image, or lemlist's AI panel draft a first version per step, which a person still reads and edits before anything launches.

Launching previews the real send: how many leads, which senders, what schedule. Once live, every reply from every channel lands in one inbox, so following up does not mean checking an email client, a LinkedIn tab and a phone separately.

Deliverability: how lemwarm keeps you out of spam

Deliverability is the part a flashy sequence cannot fix on its own, and it is the part most lemlist reviews skip past quickly. lemwarm works by sending automated emails between a network of real inboxes and having them opened and replied to like a normal conversation; mailbox providers read that pattern as human behavior and gradually trust the sending domain more.

Alongside the warm-up itself, lemwarm tracks a deliverability score for every connected mailbox and flags what is hurting it: spam-triggering content, a sending pattern that looks irregular, or a setup problem in the domain's SPF, DKIM, DMARC or MX records. The practical rule, which lemlist's own guidance repeats, is to hold a new mailbox back from real campaigns until its score is solid and sending volume has stayed steady for a couple of weeks, not to launch the day a mailbox is connected.

None of this replaces a decent cold email structure. A well-warmed mailbox sending a generic email still gets ignored; it just does not get flagged as spam on the way there.

lemlist with Clay and your CRM

lemlist is a sending and sequencing layer, not a sourcing or a system-of-record layer, and it is built to sit between the two.

On the sourcing side, Clay is the more common pairing in practice: build and enrich the list in Clay, where filtering, waterfalls and AI columns do the heavy lifting, then export into lemlist for the actual send. lemlist's own integrations page describes this pairing directly: finding the right leads with Clay's filters, then sending the multichannel campaign from lemlist.

On the system-of-record side, lemlist syncs two ways with HubSpot, Salesforce and Pipedrive, and connects directly to Attio: new leads, opens, clicks and replies flow into the CRM, and leads can be pushed from the CRM into a campaign without a manual export. The practical result is that the CRM stays the single source of truth for who was contacted and what they said, instead of that history living only inside lemlist.

lemlist pricing, in plain words

lemlist bills per seat, with two main plan tiers plus a custom Enterprise tier. The entry tier covers email sending, the lead database, email and phone finders, lemwarm, and CRM integrations. The next tier up adds the full multichannel layer: several senders per user, LinkedIn automation, calls, SMS and a WhatsApp add-on.

Paying annually lowers the per-seat rate compared to paying monthly, the same structure used across the category. Credits for lead-finding, verification and buying-signal data are a separate, smaller subscription on top of the seat price, and unused credits roll over while that subscription stays active. lemlist's own site offers a 14-day free trial with no credit card required, which gives full multichannel access (minus in-app calls) plus a batch of free credits to test the data tools.

Every third-party review of lemlist flags the same thing: cost scales with team size and channel count, so a small team on the entry tier pays a lot less than a larger team running the full multichannel stack. That is worth checking against your own seat count before comparing it to a flat-rate competitor.

Limits and alternatives

lemlist's per-seat pricing climbs quickly once a team adds users, extra senders or the multichannel tier, which is the single most repeated complaint across reviews. LinkedIn automation also carries a platform-side risk if invite and message volume is pushed past LinkedIn's own limits, regardless of which tool sends it. And because the lead database overlaps with other providers, a list built from it still needs checking against whatever your own CRM or a tool like Clay already holds, to avoid contacting the same company twice.

Teams that need unlimited mailboxes and warm-up under one flat rate instead of per-seat billing often look at Smartlead; teams running LinkedIn as the primary channel with email secondary often look at Waalaxy or HeyReach; Instantly comes up as the closest brand-recognition alternative on raw email sending. None of these swaps fixes a list or an offer that was not working in lemlist either.

How we run lemlist for clients at Kaizen

We run lemlist every week, and the build always follows the same pattern: a LinkedIn-first sequence, then email as the channel that keeps the conversation alive when LinkedIn stalls.

The order matters. The sequence opens with a LinkedIn profile visit, then a connection request, since the invite itself is the first real touch, not a warm-up for an email that follows immediately after. If the invite is not accepted within about a week, the branch switches to an email that references the LinkedIn attempt rather than a generic bump, since a prospect who ignored one channel rarely responds better to a copy-paste of the same message on another.

Once the invite is accepted, the first LinkedIn message never pitches. No product name, no "thanks for connecting, I wanted to reach out": the goal of that first message is a real reply, not a slot filled on a calendar. A second, later message can carry a soft next step once the conversation is actually going somewhere.

One operational detail clients ask about directly: senders are created and connected under the client's own lemlist user, never under Kaizen's. We join as a second user on that workspace. That way the mailboxes, the LinkedIn connection, and the sending history all belong to the client from day one, and nothing has to be migrated if the engagement ends.

Common mistakes

1. Sending real volume through a mailbox that has not been warmed yet. The deliverability hit shows up in every later campaign, not just the rushed one.
2. Treating the LinkedIn invite as a formality before the "real" email. The invite is the first impression; a sloppy note there costs the reply before the sequence even starts.
3. Pitching in the first LinkedIn message after an accepted invite. It reads exactly like the automation it is, and the reader can tell.
4. Building the list inside lemlist's own database when a sharper, already-enriched list already exists in Clay or the CRM. Importing beats re-sourcing.
5. Letting senders sit under an agency's own lemlist user. The client ends up with no record of their own outbound history the day the contract changes.

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