Having recently conducted a comparative analysis of entry-level marketing automation platforms for a small-scale data pipeline project, I found the distinctions between Brevo (formerly Sendinblue) and MailerLite's free offerings to be both nuanced and significant for a list of approximately 2,000 contacts. The decision matrix extends far beyond a simple subscriber cap; it involves a critical evaluation of data handling constraints, API reliability for future integrations, and the structural limitations imposed on audience segmentation.
A side-by-side feature breakdown reveals the core operational parameters:
**Brevo Free Plan (300 emails/day limit)**
* **Subscriber Limit:** Unlimited contacts, but only 2,000 can be targeted in a given campaign due to the daily send cap.
* **Workflow Automation:** Absent in the free tier. This is a critical gap for any nascent data pipeline aiming for trigger-based sequences.
* **API Access:** Provided, but with rate limits. Essential for syncing subscriber data to a warehouse or custom application.
* **Key Differentiator:** Transactional email allowance (300/day). This blurs the line between marketing and operational messaging, which can be architecturally significant.
**MailerLite Free Plan (12,000 emails/month limit)**
* **Subscriber Limit:** 1,000 contacts. A list of 2,000 subscribers immediately disqualifies this plan, necessitating an upgrade.
* **Workflow Automation:** Includes a visual automation builder even on the free plan, supporting basic multi-step sequences.
* **API Access:** Full REST API is available, documented, and generally robust for its tier.
* **Key Differentiator:** The monthly email ceiling offers more batch-send flexibility compared to Brevo's strict daily throttle.
For a 2k list, MailerLite's free plan is structurally incompatible due to the 1,000 contact hard cap. Therefore, the practical comparison is between Brevo's free plan and MailerLite's first paid tier. However, focusing purely on the *free* tier constraints:
If your operational model can tolerate a strict 300-emails-per-day send rate and you require no automation, Brevo can technically hold the data. Your broadcast cadence would be severely limited. The lack of automation is a major impediment for any structured onboarding or behavioral campaign series. The transactional email feature, however, presents a potential consolidation point for outgoing email streams.
The API design and resulting data schema are also a consideration for long-term integration health. A preliminary test of webhook payloads from each service shows differing levels of detail in event reporting, which impacts downstream analytics.
```json
// Example Brevo webhook snippet for 'opened' event
{
"event": "opened",
"email": "[email protected]",
"id": 123456,
"date": "2023-10-26 10:00:00",
"campaign": "Welcome Series"
}
// Example MailerLite webhook snippet for 'opened' event
{
"event": "subscriber.opened",
"subscriber": {
"email": "[email protected]",
"id": "abc123def"
},
"campaign": {
"id": "camp_456",
"name": "Welcome Series"
},
"timestamp": "2023-10-26T10:00:00Z"
}
```
The structural nesting in MailerLite's payload is often more conducive to parsing and loading into a normalized table structure within a data warehouse.
In summary, for the stated list size, neither free plan is optimal. Brevo's is operationally restrictive but possible for very low-volume sends, while MailerLite's is a non-starter due to the subscriber cap. The evaluation should quickly progress to assessing the cost-benefit ratio of each platform's first paid tier, where automation features, deliverability analytics, and CRM sync reliability become the primary vectors for comparison.
Data is the source of truth.
I manage data pipelines and marketing system integrations for a mid-sized e-commerce company, and we've run both Brevo and MailerLite in production for different use cases over the past three years.
* **Integration Complexity and API Limits**: Brevo's API is more extensive but the free tier imposes strict rate limiting (40 requests/minute, 100,000 requests/month). For syncing a 2k list with a warehouse, this is fine for daily batch jobs but will throttle real-time syncs. MailerLite's API is simpler but more permissive on the free plan (around 120 requests/minute); it's easier to handle basic subscriber management without hitting walls.
* **Data Handling and Field Limitations**: Brevo's unlimited contacts become a trap; you can store many contacts but only email 300/day, which for a 2k list means a full broadcast takes a week. MailerLite's hard 1k subscriber cap on free is clear, but you'd be over it. For true 2k, you're forced onto MailerLite's paid "Growing Business" plan at $18/month. Brevo's free plan technically accommodates 2k, but the send throttle is the real constraint.
* **Automation and Trigger Path**: The OP is correct that Brevo's free tier has zero workflow automation. MailerLite's free tier includes basic automation triggers (subscriber join, date-based) for a single sequence, which is a functional advantage for building a simple data-triggered email sequence without immediate cost.
* **Email Type and Pipeline Blending**: Brevo's inclusion of 300 transactional emails/day is unique. If your project involves sending operational emails (order confirmations, password resets) from the same pipeline, this consolidates tools. MailerLite's free plan is strictly for marketing.
Given a firm 2k subscriber list, I'd recommend MailerLite's paid "Growing Business" plan for its predictable delivery and automation. If your priority is strictly cost and you can tolerate the 7-day send spread for campaigns while needing transactional email capability, Brevo's free tier is workable. To decide, confirm whether your "project" requires any trigger-based sequences and if you need to blend marketing and transactional sends.
—BJ
"Transactional email allowance (300/day). This blurs the line..."
That's the vendor hook. They're betting you'll get value from that and then hit the daily send cap on marketing emails almost immediately. For a 2k list, that 300/day limit is a brick wall, not a feature.
Your workflow automation point is the real killer. No automation means you're manually segmenting and sending to tiny slices of your list. It's a toy, not a pipeline.
Prove it
You've correctly identified the transactional email allowance as a key differentiator, but its operational impact is often misunderstood. While it blurs the line between marketing and operational messaging, the 300/day cap is a shared pool. Sending a password reset email consumes the same quota as your newsletter. For a 2k list, this creates a critical resource contention problem.
The absence of workflow automation on Brevo's free tier is indeed the structural flaw. You cannot build a triggered welcome series. This forces a purely batch-oriented model, which nullifies the potential benefit of having unlimited contact storage. You're left with a static list you can only email in small, manual segments.
If your project's goal is a dynamic pipeline, MailerLite's free automation builder for up to 500 subscribers becomes the decisive factor, even with its total subscriber cap. It allows for a functional, event-driven architecture, which is more valuable than Brevo's higher theoretical send limit applied to a manual process.
You've nailed the primary operational tension with Brevo's free plan. The "unlimited contacts" tag is marketing genius, but practically useless when paired with the 300/day send cap and no automation.
It creates a false sense of scalability. You might be tempted to build that list, thinking you're future-proofed, but you're actually building a data silo you can't effectively communicate with. For a 2k list, that daily cap means it would take nearly a week to send a single campaign to everyone.
Where this gets really problematic is list hygiene. Without automation, you can't set up a basic re-engagement or sunset workflow. Your unlimited storage just becomes a graveyard for stale contacts that hurt your deliverability over time, which is a hidden cost the free plan doesn't advertise.
catdad