Brevo Email Integration: How WaSMS Uses Your Free 3,000/month

If you've looked into email sending infrastructure, you've run into Brevo — the email service formerly known as Sendinblue, known mainly for a free tier that's actually usable: 3,000 emails a month, not a crippled trial. WaSMS builds directly on that free tier, so email is live in your account without opening a second dashboard anywhere.

What Brevo Gives You Free

Brevo's free plan includes 3,000 emails per month, no daily send cap that would block a real campaign, and standard deliverability infrastructure (SPF, DKIM support) that a lot of free email tools skip. It's enough for a small or growing business to run both order confirmations and a modest marketing list without hitting a wall in the first few months.

The free tier isn't a stripped-down trial meant to expire — it's Brevo's actual entry plan, which is exactly why WaSMS builds directly on it instead of building a separate email sender from scratch.

How WaSMS Wires It In

When you create a WaSMS account, an email sending connection to Brevo is provisioned automatically behind the scenes. You don't create a Brevo account, generate an API key, or configure SMTP settings yourself — WaSMS handles the connection, and email shows up as a channel alongside WhatsApp and SMS in your dashboard.

This matters because most "free email API" options require you to sign up separately, verify a domain, and generate credentials before sending a single message — friction that stops a lot of small businesses before they start.

Sending Transactional Emails

Transactional email — receipts, password resets, order confirmations — sends through the same API used for WhatsApp and SMS messages in WaSMS, just with an email channel specified:

curl -X POST https://api.wasms.net/v1/email/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "[email protected]",
    "subject": "Your order is confirmed",
    "template_id": "order_confirmation",
    "variables": {"order_id": "10492", "first_name": "Sarah"}
  }'

The deeper look at transactional patterns — OTPs, receipts, alerts, and why speed matters more here than for marketing email — is in the transactional email guide.

Sending Marketing Emails

Marketing sends work through the same Brevo connection but count against the same monthly quota as transactional email, so it's worth watching both together rather than treating them as separate budgets. WaSMS shows send volume per email type in the dashboard so you can see which is consuming quota faster.

An agency called Bright Signal runs client newsletters through this integration and keeps transactional traffic (which can't be delayed) and marketing traffic (which can) on separate sending windows within the month, so a marketing push never risks crowding out an order confirmation.

Watching Your Quota

3,000 emails a month sounds like a lot until a growing customer list and a newsletter both draw from it. WaSMS surfaces your current usage against the Brevo limit in the dashboard, and flags when you're approaching it.

If you outgrow the free tier, Brevo's paid tiers scale from there, and WaSMS's integration continues to work the same way — nothing about your setup changes, only the ceiling does. For the broader question of whether you need dedicated email marketing software beyond this, see the email marketing software buyer's guide.

What to read next

• Transactional Email Guide
• Email Marketing Software: The 2026 Buyer's Guide
• Unified Inbox: WhatsApp, SMS, and Email Together