Open-source alternative
for Resend
Resend is transactional-only. BigFat AI Labs gives you transactional emails, marketing campaigns, and workflow automation in a single open-source platform. No second tool, no second bill.
The Pricing Model That Makes Sense
Pay for what you use, not fixed subscriptions
Pay per email sent
Pay-as-you-go pricing. Only pay for emails you actually send.
- Only pay for emails you actually send
- Scale up or down without commitment
- Marketing and automation included
Fixed subscription tiers
Monthly subscription with fixed email limits per tier.
- Locked into monthly subscription tiers
- Need to upgrade plan as you grow
- Transactional only, no marketing
What BigFat AI Labs Adds
Beyond transactional emails
Marketing Campaigns
Send one-time broadcasts to all contacts or specific segments. Schedule sends, track performance. Resend doesn't offer this.
Workflow Automation
Build multi-step email sequences with triggers, delays, and conditions. Perfect for onboarding, drip campaigns, cart abandonment.
Dynamic Segmentation
Create audience segments that update automatically based on contact data and behavior. Target campaigns precisely.
Open Source
AGPL-3.0 licensed. Inspect the code, contribute features, no vendor lock-in. Resend is proprietary.
Self-Hostable
Run on your infrastructure with Docker. Full data control, compliance-ready. Pay only AWS SES fees when self-hosting.
All-in-One Platform
One platform for transactional, marketing, and automation. No need for multiple tools or integrations.
Feature comparison
Frequently asked questions
When should I choose Resend over BigFat AI Labs?
Choose Resend if you only need transactional emails and prefer a service focused exclusively on that use case. Resend has a larger free tier and excellent developer experience for transactional emails. Choose BigFat AI Labs if you need marketing campaigns, automation workflows, or want the flexibility to self-host (though BigFat AI Labs also offers fully-managed hosting).
What is the pricing difference between BigFat AI Labs and Resend?
BigFat AI Labs uses a pay-as-you-go pricing model, while Resend uses a fixed subscription model. Both optimize for different use cases - Resend focuses exclusively on transactional emails. BigFat AI Labs includes marketing campaigns and workflow automation at no additional cost. If you need both transactional and marketing emails, BigFat AI Labs may be more cost-effective overall since you won't need a separate marketing platform.
Is migration from Resend to BigFat AI Labs complex?
Migration requires updating your API integration since BigFat AI Labs and Resend use different API structures. You'll need to update your code to use BigFat AI Labs' endpoints and parameter format. However, both platforms support similar features (templates, webhooks, custom domains), so the concepts translate directly. Plan for a few hours of development work to migrate your integration.
What does BigFat AI Labs offer that Resend doesn't?
BigFat AI Labs adds marketing campaigns (one-time broadcasts to segments), workflow automation (multi-step email sequences with triggers and conditions), and dynamic audience segmentation. These features mean you can handle both transactional and marketing emails in one platform. BigFat AI Labs is also open-source (AGPL-3.0) and self-hostable, giving you full control over your email infrastructure.
Try BigFat AI Labs free
1,000 emails/month free. No credit card required. Add marketing and automation when you need it.