Best forA modern developer API with email templates written as React components.
Trade-offA younger service than Postmark or SES, and costlier than SES at very high volume.
Used by 944 makers' products for this · SendGrid vs Resend →
SendGrid alternatives
Not a ranking: each option is described by the situation it fits, with its trade-off, whether it's open source or free to start, whether AI coding agents can work with it, and how many makers' products use it for this job.
3 open source or self-hostable8 with a free tier6 ready for AI agents
For transactional email
The whole decision →Transactional or marketing. Transactional services send one message the moment your app triggers it (a password reset, a receipt). Marketing/lifecycle tools send sequences and campaigns to lists. Most apps need the first on day one and the second later.
SendGrid (Transactional + marketing): One vendor for both jobs at large scale. Trade-off: Heavier than a small team needs.
Best forDeliverability when the mail has to arrive within seconds.
Trade-offStrict about transactional-only sending — marketing email goes through a separate stream — and the free developer plan is small.
Used by 615 makers' products for this · SendGrid vs Postmark →
Free tierFrom $15/moIn Lovable
Best forHigh volume and inbound email parsing and routing.
Trade-offIts dashboard and API are older and busier than newer services, and the free tier is small.
Used by 49 makers' products for this · SendGrid vs Mailgun →
From $0.10 per 1k emails
Best forSending at high volume, where cost per email matters more than tooling.
Trade-offBare-bones; you build templates, bounce handling and tooling yourself.
Used by 4 makers' products for this · SendGrid vs Amazon SES →
Plunk
Open-source platformBest forTransactional emails, event-triggered sequences and newsletters in one open-source tool, billed per email with no monthly fee.
Trade-offA small team and a smaller ecosystem than the established APIs; its old Node SDK is deprecated, so you call the REST API or SMTP.
Used by 5 makers' products for this
Best forSaaS onboarding sequences triggered by product events, with transactional sending included.
Used by 1 makers' products for this
Open sourceFree tier
Best forSending email from Node.js through any SMTP server or provider, without tying your code to one vendor's SDK.
Trade-offOnly sends — deliverability, bounces, suppression lists and logs come from whatever SMTP service is behind it.
No maker product tracked for this yet
Best forAn open-source Resend-style dashboard and API for transactional and marketing mail, on top of Amazon SES prices.
Trade-offA young project; self-hosting means running it and managing your own SES account, sending limits and reputation.
No maker product tracked for this yet
Free tierllms.txtIn Lovable
Best forA free plan that covers both transactional sending and newsletters, with SMS and WhatsApp in the same account.
Trade-offThe free plan caps sends per day; its developer API and docs are less polished than transactional-first services.
No maker product tracked for this yet