# MailerLite → AcelleMail Migration — Visual Walkthrough

> Export subscribers from MailerLite, import into AcelleMail in 6 clicks. Visual walkthrough on both sides with API-driven option for large lists.

- Canonical URL: https://acellesend.com/kb/articles/migrating-from-mailerlite-to-acellemail
- Author: Martin Keller, SaaS & Business Editor
- Category: Migration & Comparison — Switching from Mailchimp/Sendinblue, cost comparison, data migration
- Content type: tutorial · Difficulty: beginner
- Tags: Acellemail
- Published: 2026-07-04 · Last updated: 2026-08-15
- Reading time: 4 min
- Publisher: AcelleMail Knowledge Base, https://acellesend.com/kb

---

## Before you start

You'll need:

- A MailerLite account with subscriber-export permission
- An AcelleMail installation up and running
- ~30 minutes for <100k subscribers

## Export from MailerLite

In MailerLite's left sidebar, click **Subscribers** → choose the group/list to export → **Export** in the toolbar.

MailerLite asks for format (CSV) and which fields to include — select all custom fields you've defined. The file prepares in the background; check **Subscribers → Imports / Exports** for the download link (usually <2 minutes).

Exported CSV includes: email, name, all custom fields, signup date, opt-in source, segments memberships.
## Import into AcelleMail (the same 6 clicks for every source)

Once you have the CSV exported from your previous platform, the import flow in AcelleMail is identical regardless of where the data came from.

### 1. Open your destination list

In AcelleMail's sidebar, click **Audience** → choose the list that will receive the migrated subscribers (or create a new one — *New list* button top-right).

![Lists index](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/01-lists-index.png)

You'll see a per-list overview card with subscriber counts:

![List overview](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/02-list-overview.png)

### 2. Click "Import" in the list toolbar

The wizard entrypoint is on the list detail page:

![Import entry point](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/03-import-entry.png)

### 3. Upload your CSV

Drop the CSV file from the previous platform into the upload area:

![Upload empty state](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/04-upload-empty.png)

AcelleMail parses the file and confirms detection:

![Upload success](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/05-upload-success.png)

### 4. Map the columns

The wizard auto-detects standard columns (`email`, `first_name`, `last_name`) and shows green *Mapped to EMAIL* chips. Adjust manually for any non-standard column from the source:

![Map columns](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/06-map-columns.png)

### 5. Pick duplicate handling

In the same screen, choose what AcelleMail does when a subscriber already exists in this list:

- **Skip** — keep the existing row, don't overwrite
- **Update** — overwrite name/tags/custom fields with values from the CSV
- **Unsubscribe** — mark existing rows as unsubscribed (rare; used when re-importing an opted-out list)

### 6. Run the import

Click **Start import**. The job runs in the background — close the popup, work elsewhere, return to **Audience → [list] → Import** to see progress:

![Import history](https://acellesend.com/plugins/acelle/landing/images/help/kb/import-csv/07-import-entry-revisit.png)

You'll see *Pending* → *Running* → *Complete* per import job, with rows-imported / rows-skipped / errors counts.

## After the import

- **Verify list count** matches your expected size (rows that failed validation appear in the *Errors* column with a downloadable error CSV).
- **Re-tag if needed** — for behavioural data that doesn't fit a CSV column (e.g. "opened campaign X"), you may need to re-create the tag via segmentation rules.
- **Pause for warm-up** — if the imported list is large (>10k) and your sending IP is new or recently rotated, run a short warm-up campaign to your most-engaged 10% before the full send. See [IP warm-up best practices](https://acellesend.com/kb/articles/ip-warmup-schedule-for-new-sending-servers) for the schedule.

## Rebuilding MailerLite automations

MailerLite's **automation workflows** map to AcelleMail's **Automations**. Equivalent triggers:

| MailerLite trigger | AcelleMail trigger |
|---|---|
| Joins group | Subscribed to list |
| Updates field | Field value change |
| Anniversary of date | Date relative |
| Completes a form | Subscribed to list (form's target list) |
| Clicks a specific link | Link clicked |

## Merge-tag syntax differences

| MailerLite | AcelleMail |
|---|---|
| `{$name}` | `{{ subscriber.first_name }}` |
| `{$last_name}` | `{{ subscriber.last_name }}` |
| `{$email}` | `{{ subscriber.email }}` |
| `{$url_unsubscribe}` | `{{ unsubscribe_url }}` |
| `{$url_webversion}` | `{{ web_view_url }}` |

<details>
<summary><strong>Advanced: API-driven migration with MailerLite's subscribers endpoint</strong></summary>

For large MailerLite accounts or scheduled sync:

**Export from MailerLite via API:**

```bash
# MailerLite v2 API token from Integrations → API
curl -X GET "https://connect.mailerlite.com/api/subscribers?limit=100&page=1" \
  -H "Authorization: Bearer <MAILERLITE_API_TOKEN>" \
  -H "Accept: application/json" \
  -o mailerlite-subscribers.json
```

Paginate via `page`; MailerLite returns max 100/page.

**Import into AcelleMail:**

```bash
ACELLE_TOKEN="..."
ACELLE_LIST_UID="..."

jq -c '.data[] | {email: .email, first_name: .fields.name, last_name: .fields.last_name}' mailerlite-subscribers.json \
  | while read sub; do
      curl -X POST "https://acellemail.com/api/v1/subscribers" \
        -H "Authorization: Bearer $ACELLE_TOKEN" \
        -d "{\"list_uid\":\"$ACELLE_LIST_UID\",\"subscriber\":$sub}"
    done
```

</details>

## Related articles

- [Importing contacts CSV — best practices and field mapping](https://acellesend.com/kb/articles/importing-contacts-csv-best-practices-and-field-mapping)
- [Migration from Mailchimp to AcelleMail](https://acellesend.com/kb/articles/migrating-from-mailchimp-to-acellemail)
- [Building a welcome email series in AcelleMail](https://acellesend.com/kb/articles/building-a-welcome-email-series-in-acellemail)
- [Email list hygiene](https://acellesend.com/kb/articles/email-list-hygiene-clean-your-list-for-better-deliverability)

---

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