Sales outreach · checked 2026-10-13

Can I vibecode lemlist?

KINDA· weekend project

The sending engine is the easy part: import leads, send a few follow-ups from your own mailbox, stop when someone replies. An agent writes that in an evening. The rest of the weekend goes into what decides whether mail lands and stays legal: threading, daily caps, sending windows, bounce and reply handling, opt-outs. What stays out of reach is everything lemlist bundles around the sender: a lead database, a shared warm-up network, and LinkedIn steps that break LinkedIn's rules when you automate them yourself.

$69/moprice

$828you'd save a year

weekendbuild time

—people replaced it

Before you start

What you need on hand.

DifficultyIntermediate · Some system setup or keys.

TimeAn evening for the sequencer; give a new sending domain a few weeks of low volume before real campaigns

Claude Code, Codex or CursorAny of them can run the prompt.
Node.js 22better-sqlite3 compiles a native module, so build tools must be installed.
A mailbox on a separate sending domainGoogle Workspace or Microsoft 365 with an app password, or any provider with SMTP and IMAP.
DNS access for that domainFor SPF, DKIM and DMARC records; budget half an hour.
Your lead list as CSVOnly people you have a lawful reason to contact.

Before you buildBefore building, try Hunter's free plan (sequences from one mailbox, 500 recipients each) or Apollo's free plan (2 sequences); for a handful of prospects they may be enough.

1. Install one agent: Claude Code, Codex, Cursor.
2. Make an empty folder and open it in the agent.
3. Paste the prompt below, press enter, and answer its questions as it builds.

The prompt

Build me a personal cold-email sequencer to replace lemlist. Requirements:

- Node.js 22 + TypeScript: Fastify with server-rendered pages and htmx on
  http://127.0.0.1:4800; storage in better-sqlite3 at ./data/outreach.db.
- Leads: import CSV with papaparse, map columns to email, firstName, company and
  custom fields, skip duplicates and anyone on the suppression list.
- Campaigns: up to 6 email steps, each with a delay in days. Templates use
  liquidjs ({{ firstName }}, {{ company | default: "your team" }}); preview any
  step for any lead, and refuse to launch while a variable is empty.
- Sending: nodemailer over my own mailbox's SMTP (credentials in .env).
  Follow-ups stay in the same thread (In-Reply-To and References headers).
  Daily cap per mailbox (default 30), a sending window in the lead's time zone,
  and a random 2-6 minute gap between emails.
- Replies and bounces: check the mailbox every 5 minutes with imapflow; a reply
  stops that lead's sequence, a bounce marks the address invalid.
- Opt-out without a public server: every email ends with "reply STOP to opt
  out" and carries a List-Unsubscribe mailto header; those replies go to a
  permanent suppression list.
- Per-campaign stats (sent, replied, bounced, opted out) and a CSV export of
  leads with their status.
- No accounts, no telemetry, local-first. No open-tracking pixels.
- Out of scope: finding emails, inbox warm-up and LinkedIn steps (automating
  LinkedIn breaks its user agreement).
- README: SPF, DKIM and DMARC setup, why to send from a separate domain, CAN-SPAM
  and GDPR basics, and a plain warning that deliverability depends on the domain
  and the list, not on this code.

Opens your agent with the prompt filled in, you press enter. Or copy it and paste it into an empty folder.

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Then keep going

Next prompts, same folder.

The first prompt builds the core. Run these one at a time in the same folder to grow it into your own lemlist.

Add email verification to the sequencer in this folder. Requirements:

- Check every new lead against a self-hosted Reacher container
  (check-if-email-exists) at REACHER_URL in .env, at most 2 checks a second.
- Store the result (safe, risky, invalid, unknown); never send to invalid,
  and sending to risky needs a per-campaign opt-in.
- Show the counts on the campaign page before launch.
- Update the README with the Docker command and a warning that Reacher needs
  outbound port 25, which many home and cloud connections block.

Add mailbox rotation to the sequencer in this folder. Requirements:

- Store several mailboxes (SMTP and IMAP settings in .env, one block per
  mailbox), each with its own daily cap.
- Assign each lead to one mailbox at launch and keep all its follow-ups on
  that mailbox so the thread stays intact.
- Poll every mailbox for replies and bounces.
- A settings page shows today's sends per mailbox against its cap.
- Update the README.

Add reply sorting to the sequencer in this folder. Requirements:

- Send each new reply to the LLM set in .env (OPENAI_API_KEY or
  ANTHROPIC_API_KEY) and label it interested, not now, not interested, out
  of office or opt-out.
- Out of office pauses the lead until the return date in the reply, or 7
  days if there is none. Opt-out adds the address to the suppression list.
- An inbox view shows the labels; I can correct any label and my choice wins.
- Never send a reply automatically.
- Update the README with the cost per 1,000 replies.

Add a lemlist importer to the sequencer in this folder. Requirements:

- Accept CSVs from lemlist (Campaign > Leads list > select all > Export as
  .CSV), one file per campaign.
- Read the header first, show me the column mapping and ask before importing.
- Custom variables become custom fields.
- If the file has no status column, let me import the Replied, Bounced and
  Unsubscribed segments (exported separately with filters) straight into the
  suppression list.
- Print a summary: imported, skipped, suppressed.
- Update the README with the export steps.

What you lose

The lead database and the email and phone finder
lemwarm warm-up and the deliverability hub
LinkedIn, call, SMS and WhatsApp steps
AI agents that research leads and write messages
CRM sync and shared campaigns for a team

Why people still pay

Sales teams pay for one tool that finds the lead, writes and sends the sequence across email and LinkedIn, and keeps their mailboxes out of spam. The sending logic is simple; the lead data, the warm-up pool and LinkedIn automation that keeps working are the parts that need a company behind them.

Moatproprietary data infrastructure scale network effects

Do the math

lemlist or your own copy?

Over

Your usage

Count my time12h ×$/h

lemlist, 1 yr$828

Your own copy, 1 yr$98running + build session

You keep$731pays for itself in the first month

Estimate · Free with a mailbox you already have. A separate sending domain costs about $10-15 a year and a Google Workspace or Microsoft 365 mailbox roughly $6-9 a month. The build is token usage on your agent plan.

Leaving lemlist

Take your data, then cancel.

1 · Take your data out of lemlist

1Open Campaigns, pick a campaign and go to the Leads list tab.
2Tick the top checkbox to select all leads, then click Export as .CSV in the bulk actions bar. The file holds names, email, company, LinkedIn URL, phone and custom variables.
3Repeat for every campaign; use Filters (Replied, Bounced, Deliverable) to export segments, and export campaign results separately.
4Copy your sequences and email templates out by hand: the CSV holds leads, not steps.

2 · Cancel lemlist

1Click your profile icon in the bottom-left corner and open Settings.
2Go to Billing & Users, open the Products tab and click Manage in the Subscription section.
3Click Cancel in the plans window and confirm. Only admins can do this.

Billing stops at the end of the current cycle; after that you can log in and see everything, but not send.
The enrichment add-on is a separate subscription: cancel it in its own window or it keeps billing. Its credits expire at the next anniversary date.
lemlist keeps your data indefinitely after cancelling. To delete it, email privacy@lemlist.com after cancelling; deletion is permanent and done within 7 days.
One-off top-up and gift credits stay in the account after the plan ends.

Checked 2026-10-13 against lemlist's docs: 1, 2, 3, 4

The escape hatch

Don't feel like building it? These are already free.

WarmblyOpen sourceSelf-hosted cold-email platform with sequences, a shared inbox, a small CRM and a warm-up pool; runs on Docker Compose.★ 425 · active Oct 2026 · docker to self-host
WebVisit ↗MauticOpen sourceMarketing automation with drip campaigns, segments and forms; built for contacts who opted in rather than cold outreach.★ 11k · active Oct 2026 · self-host, real ops
WebVisit ↗OpenOutreachOpen sourceSelf-hosted CLI that finds people matching your product description through a licensed data provider and emails them from your mailbox.★ 3.3k · active Oct 2026 · one-click install
CLIVisit ↗

All 5 free alternatives to lemlist ›

The numbers

lemlist pricing

Plan	Monthly	Annual, per month	What you get
Email	$69	$55	50,000 emails a month at the listed price; unlimited users and sending mailboxes; lead database, email and phone finder, lemwarm warm-up, CRM integrations and API.
Multichannel	$109/user	$87/user	5 senders per user; unlimited emails and messages; LinkedIn and SMS steps, built-in dialer, Gmail and LinkedIn extension.
Enterprise	custom	—	More than 5 senders per user, SSO/SAML, custom roles, dedicated account manager.
Lead data enrichment add-on	$20	$16	2,000 credits a month (about 400 emails or 100 phone numbers).

Free tier: No free plan: a 14-day trial with Multichannel features (except in-app calls) and 200 credits, no card required.
Billing: Monthly, quarterly (10% off) or yearly (20% off). The Email plan is priced by monthly email volume with unlimited users; Multichannel is priced per user.
Hidden costs: Finding emails and phone numbers takes credits, and the enrichment add-on ($20/mo for 2,000 credits) is billed separately and keeps running if you cancel the plan. Buying-intent signals ($29/mo) and WhatsApp are extra. You also need your own sending domains and mailboxes.
Source: www.lemlist.com

Also on the list

Apollo.io$65/mo · Sales outreachNOT REALLY

Instantly$47/mo · Sales outreachKINDA

Hunter$49/mo · Sales outreachKINDA

Questions

lemlist, briefly

Not answered here? Tell us and we'll add it.

Ask a question ›

Kinda. The core is a weekend build with the prompt on this page, but real gaps remain: The lead database and the email and phone finder, lemwarm warm-up and the deliverability hub.

About $69 a month on the Email plan, $828 a year (checked 2026-10-13).

The lead database and the email and phone finder; lemwarm warm-up and the deliverability hub; LinkedIn, call, SMS and WhatsApp steps; AI agents that research leads and write messages; CRM sync and shared campaigns for a team. If any of those matter to you, keep paying.