You built your app with Base44 because you wanted full-stack AI generation with Supabase powering your backend. The platform got acquired by Wix for $80M after just six months, which says something about the demand for this workflow. Now you need email that integrates as cleanly with Supabase as Base44 does.

Base44 generates Supabase backends by default, which creates natural integration patterns for email. Your users live in Supabase. Your authentication runs through Supabase Auth. Your data flows through Supabase tables. The best email platform for Base44 projects should understand this stack and work with it natively.

This guide covers 10 email marketing tools that integrate well with Base44 applications and the Supabase ecosystem. I focused on platforms that work cleanly with Supabase, have reasonable APIs, and understand SaaS use cases. If you are using a different vibe-coding tool, check out our guides for Bolt.new, Lovable, or Cursor.

Quick Comparison

Tool	Best For	Price at 10k Subs	Supabase Integration	Stripe Sync
Sequenzy	SaaS with Stripe	$49/mo	Native	Native OAuth
Resend	React developers	$20/mo (volume)	Edge functions	No
Loops	Simplicity	$79/mo	API	Partial
Postmark	Deliverability	$15/mo (volume)	Edge functions	No
SendGrid	Scale	$20-$90/mo	Webhooks	No
Plunk	Budget/open-source	Free-$10/mo	API	No
Customer.io	Complex automation	$100+/mo	API	Via Segment
Mailgun	Developer docs	$35/mo	API	No
Brevo	Budget + SMS	Free-$25/mo	API	No
MailerLite	Beginners	Free-$50/mo	Zapier	Zapier

1. Sequenzy

Price: Free (100 subscribers) / $49/mo at 10,000 subscribers. Transactional emails included at no extra cost.

Base44 generates Supabase backends, and Sequenzy has native Supabase integration that syncs any table to your subscriber list automatically. When someone signs up through Supabase Auth, they appear in Sequenzy and can enter your welcome sequence without writing webhook code or edge functions.

The platform was built specifically for SaaS founders, which aligns with what most Base44 users are building. The visual sequence builder handles welcome emails, onboarding drips, trial conversion campaigns, and churn prevention. The AI can generate complete sequences from a description. Describe what you want, and you get working email flows in minutes.

Beyond Supabase, Sequenzy offers native Stripe OAuth integration. If your Base44 project handles subscriptions, Sequenzy syncs MRR, LTV, plan changes, and payment events automatically. You can segment by revenue tier, create dunning sequences for failed payments, and track which emails actually drive conversions. No Zapier required, no webhook configuration.

Sequenzy handles both transactional emails and marketing automation in one platform. Password resets from Supabase Auth and your onboarding sequences flow through the same system. One sender reputation, one dashboard, half the complexity of juggling multiple tools.

Where it falls short: No SMS messaging, no landing page builder, smaller integration count than legacy platforms. If you need multi-channel messaging, pair Sequenzy with a push notification tool.

Best for: SaaS founders building with Base44 and Supabase who want native integrations without configuration complexity. At $49/mo for 10k subscribers, it is significantly cheaper than Loops ($79) and Customer.io ($100+). Built by founders, for founders, with direct support.

2. Resend

Price: Free (3,000 emails/month) / $20/mo for 50,000 emails

Resend has an existing Supabase integration, making it a natural fit for Base44 projects. The developer experience is excellent. Clean API, predictable behavior, thorough documentation. Calling Resend from Supabase Edge Functions is straightforward.

The React Email library is relevant since many Base44 projects generate React frontends. Build email templates using JSX, maintaining consistency with your app's component patterns. Authentication setup (SPF, DKIM, DMARC) is guided and sensible.

For Base44 projects where developers handle the integration, Resend feels natural. A few lines of code in an edge function handles password resets, confirmations, or any transactional message.

Where it falls short: Resend is not a marketing platform. No sequences, no behavioral triggers, no campaign management. If you need onboarding flows or trial conversion campaigns, you will need a second tool. See our Sequenzy vs Resend comparison for details.

Best for: Developers who need excellent transactional email and are comfortable pairing it with a separate marketing tool.

3. Loops

Price: Free (1,000 contacts) / $79/mo at 10,000 subscribers

Loops takes the modern, minimal approach to email marketing. The interface is clean, setup is fast, and you can have campaigns running quickly. For Base44 founders who find enterprise platforms overwhelming, Loops is refreshing.

The platform combines transactional and marketing email in one place, similar to Sequenzy. You get a visual automation builder, a clean email editor, and enough features to run a SaaS. The API works with Supabase Edge Functions for triggering events.

Where it falls short: Automation capabilities are basic compared to Customer.io or Sequenzy. Stripe integration exists but is not as deep as Sequenzy's OAuth approach. At $79/mo for 10k subscribers, it costs more than Sequenzy ($49/mo).

Best for: Founders who prioritize simplicity and modern design over sophisticated automation.

4. Postmark

Price: From $15/mo for 10,000 emails

Postmark built its reputation on deliverability. If getting emails into inboxes is your primary concern, especially authentication codes and payment alerts, Postmark delivers consistently.

The platform works well with Supabase Edge Functions. The API is clean, documentation thorough, and emails arrive within seconds. Postmark separates transactional and broadcast email into different streams, protecting critical messages from marketing reputation issues.

For Base44 projects handling authentication through Supabase Auth, reliable transactional delivery matters. Postmark excels here.

Where it falls short: Broadcast (marketing) features are basic. Limited automation, basic segmentation. No free tier.

Best for: Base44 projects where transactional email reliability is critical. Consider pairing with a marketing platform.

5. SendGrid

Price: Free (100 emails/day) / $20-$90/mo at scale

SendGrid is the established enterprise option. The platform handles massive volumes reliably and offers dedicated IPs at scale. For Base44 projects expecting significant growth, SendGrid's infrastructure is proven.

Webhooks work cleanly with Supabase. The platform offers both transactional API and Marketing Campaigns. Documentation is comprehensive.

Where it falls short: Interface is cluttered. Marketing features lag behind specialized SaaS tools. Not SaaS-specific, no native Stripe integration.

Best for: Teams expecting high volume who need established infrastructure.

6. Plunk

Price: Free (3,000 emails/month) / ~$10/mo for more

Plunk is the open-source option for budget-conscious Base44 founders. The vibe aligns with Supabase's open-source ethos. Self-hostable for full control, or use the managed version for minimal cost.

The API is straightforward for integration with Supabase Edge Functions. Basic automation features are included.

Where it falls short: Fewer features than commercial alternatives. Smaller platform with less track record.

Best for: Bootstrapped founders who want open-source tools throughout their stack.

7. Customer.io

Price: From $100/mo for up to 5,000 profiles

Customer.io is the sophisticated automation platform for complex behavioral messaging. If your customer journey has many branches and conditions, Customer.io can handle it.

The event API integrates with Supabase through webhooks or edge functions. Track user behavior and trigger multi-channel messaging. The visual workflow builder handles complex logic.

Where it falls short: Starting at $100/mo, significantly more expensive than alternatives. Steep learning curve. Transactional email requires separate product.

Best for: Established SaaS with dedicated marketing teams and complex journeys.

8. Mailgun

Price: From $35/mo

Mailgun provides developer-focused email infrastructure. The API is flexible, documentation thorough, and you get 99.99% uptime SLA.

Works well with Supabase Edge Functions for programmatic email. Email validation, deliverability tracking, and detailed analytics are included.

Where it falls short: Less polished DX than Resend. Marketing automation is basic.

Best for: Technical teams wanting flexibility and detailed control.

9. Brevo (formerly Sendinblue)

Price: Free (300 emails/day) / $25/mo at 20,000 emails

Brevo offers good value plus SMS and WhatsApp that most competitors lack. If multi-channel matters for your Base44 project, Brevo handles it.

The API works with Supabase Edge Functions. Free tier is generous for testing.

Where it falls short: Mixed deliverability reports. Interface feels dated. Not SaaS-focused.

Best for: Budget-conscious founders needing SMS alongside email.

10. MailerLite

Price: Free (1,000 subscribers) / ~$50/mo at 10,000

MailerLite is the beginner-friendly option with landing pages and forms included. The free tier gives 1,000 subscribers and 12,000 emails monthly.

Integration with Supabase requires Zapier or custom webhooks. The email editor is intuitive.

Where it falls short: Not SaaS-focused. Limited behavioral triggers. Supabase integration is not native.

Best for: Beginners who want landing pages and email together with gentle learning curve.

How to Choose

If you are just validating

Start with free tiers. Sequenzy offers 100 subscribers free with native Supabase integration. Loops gives 1,000 contacts. MailerLite has 1,000 subscribers. Test the Supabase integration before committing.

If you need transactional immediately

Postmark or Resend for pure transactional with excellent deliverability. Both work cleanly with Supabase Edge Functions. Sequenzy if you want marketing automation included.

If you are building product-led growth

Sequenzy or Customer.io for behavioral triggers. You need emails based on what users do. Sequenzy's Supabase integration makes event tracking straightforward.

If budget is tight

Plunk matches Supabase's open-source ethos. Brevo's free tier is generous. EmailOctopus offers 2,500 subscribers free (integrate via API).

Integration Patterns for Base44

Native Supabase sync

Sequenzy's Supabase integration automatically syncs your users table to subscribers. Configure which fields map to subscriber attributes, and new signups flow into email sequences automatically. No edge functions required.

Supabase Edge Functions

For other platforms, Supabase Edge Functions call email APIs when events occur. User signs up, payment succeeds, milestone hit. The function sends the appropriate email or updates subscriber data.

// Example: Supabase Edge Function calling Sequenzy
import { serve } from 'https://deno.land/std@0.168.0/http/server.ts'

serve(async (req) => {
  const { email, name, plan } = await req.json()

  await fetch('https://api.sequenzy.com/v1/subscribers', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${Deno.env.get('SEQUENZY_API_KEY')}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      email,
      attributes: { name, plan }
    })
  })

  return new Response('OK')
})

Database webhooks

Supabase can trigger webhooks when database records change. Set up a webhook to call your email platform when users hit milestones, change plans, or become inactive.

Stripe webhooks for payment events

If your Base44 project uses Stripe, payment webhooks trigger email actions. Sequenzy handles this natively through OAuth. Other platforms need a webhook handler in an edge function.

The Bottom Line

For most Base44 projects, Sequenzy makes the most sense. Native Supabase integration eliminates configuration, native Stripe OAuth syncs payment data, and the unified platform handles transactional AND marketing. The visual sequence builder matches Base44's rapid development approach.

If you need pure transactional with developer-friendly API, Resend integrates well with Supabase. If simplicity matters most, Loops is clean and fast. For open-source alignment, Plunk matches Supabase's philosophy.

Pick something that works with your Supabase stack natively. You chose Base44 for rapid development. Your email platform should support that speed. For more context, see our SaaS email marketing guide.

Using a different tool? Check our guides for Softgen, Lovable, or Cursor.