> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rocket.new/llms.txt
> Use this file to discover all available pages before exploring further.
# Comparison guide
> Compare Rocket.new email and SMS integrations - Resend, SendGrid, Brevo, MailerLite, Mailchimp, and Twilio.
export const LlmsDirective = () =>
For the complete documentation index, see llms.txt.
For a lightweight markdown version of this page, append .md to the URL.
;
Rocket supports six email and messaging integrations. This page helps you pick the right one for your project.
**Quick answer:**
* **Transactional emails** (receipts, password resets, notifications): Use **Resend** or **SendGrid**.
* **Marketing emails** (campaigns, newsletters, drip sequences): Use **Mailchimp**, **MailerLite**, or **Brevo**.
* **SMS messages** (verification codes, alerts, reminders): Use **Twilio**.
* **All-in-one** (email + SMS + CRM in a single platform): Use **Brevo**.
## Comparison table
*Scroll right to see all six services →*
| Feature | Resend | SendGrid | Brevo | MailerLite | Mailchimp | Twilio |
| ------------------------ | ---------------------- | ------------------------------------- | ------------------------------ | ------------------------------------- | --------------------------------------- | ------------------ |
| **Best for** | Transactional emails | High-volume transactional + marketing | All-in-one (email + SMS + CRM) | Newsletters and subscriber automation | Email campaigns and audience management | SMS messages |
| **Transactional emails** | Excellent | Excellent | Good | Limited | Limited | N/A (SMS only) |
| **Marketing emails** | No | Good | Good | Excellent | Excellent | N/A |
| **SMS support** | No | No | Yes | No | No | Yes |
| **Built-in CRM** | No | No | Yes | No | No | No |
| **Free tier** | 3,000 emails/month | 100 emails/day | 300 emails/day | 500 subscribers, 12,000 emails/month | 500 contacts, 1,000 sends/month | Trial credits only |
| **Developer experience** | Excellent (modern API) | Good | Good | Good | Good | Good |
| **Supabase SMTP** | Yes | Yes | Yes | No | No | N/A |
| **Connection method** | API key | API key | API key | API token | OAuth | API key |
## Detailed recommendations
**Use Resend.**
Resend is purpose-built for transactional emails with excellent deliverability and a clean developer API. It also works with Supabase SMTP, so you can route authentication emails (password resets, magic links) through Resend for consistent branding.
**Pair with:** Supabase (auth) + Stripe (payments)
```plaintext wrap theme={null}
Connect Resend and send a welcome email when a user signs up and an order confirmation after each Stripe payment.
```
**Use SendGrid.**
SendGrid handles high volume reliably and includes both transactional and marketing email features. It has robust analytics for open rates, click tracking, and bounce management.
```plaintext wrap theme={null}
Connect SendGrid and send order confirmation emails with tracking links after each purchase. Include open and click tracking.
```
**Use Mailchimp or MailerLite.**
Both are excellent for marketing campaigns. **Mailchimp** has more advanced features (A/B testing, complex automations, audience segmentation). **MailerLite** is simpler and more affordable, with a generous free tier.
* Choose **Mailchimp** if you need advanced segmentation and A/B testing.
* Choose **MailerLite** if you want simplicity and a free plan for up to 500 subscribers.
```plaintext wrap theme={null}
Add a newsletter signup form to the footer. When someone subscribes, add them to Mailchimp and send a welcome email sequence.
```
**Use Brevo.**
Brevo (formerly Sendinblue) combines transactional email, marketing campaigns, SMS messaging, and a built-in CRM in one platform. It is the best choice if you want everything in one place without managing multiple integrations.
```plaintext wrap theme={null}
Connect Brevo. Send a welcome email when a user signs up, then an SMS reminder if they have not logged in after 3 days.
```
**Use Twilio.**
Twilio is the standard for SMS. Use it for verification codes, two-factor authentication, order updates, and appointment reminders.
```plaintext wrap theme={null}
Add SMS verification to the signup flow using Twilio. Send a 6-digit code and verify it before creating the account.
```
## Browse email and messaging integrations
Developer-first transactional email with high deliverability.
High-volume email delivery for transactional and marketing.
All-in-one email, SMS, and CRM (formerly Sendinblue).
Simple email marketing, newsletters, and automation.
Email campaigns, audience management, and A/B testing.
SMS messages for verifications, alerts, and notifications.