Plunk

Open-source email for SaaS

Free tier + paidEmail, forms & notificationsuseplunk.com

What it is

Open-source email platform that wraps Amazon SES with transactional sending, automation workflows, campaign broadcasts and contact tracking. Every feature is available on every plan — nothing is gated. Run it as a managed cloud service or self-host it against your own SES account.

Why it earns a slot

The cheapest honest per-email pricing here and no per-contact tax. Good when you want Loops-style automations without a $49/mo floor, or want to own the whole stack.

Know before you commit

Small team and a much smaller ecosystem than Resend or Postmark. The free tier stamps Plunk branding on outgoing mail, and self-hosting means you personally own SES warm-up and reputation.

Field notes

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Pricing snapshot

Free: 1,000 emails/mo with Plunk branding and unlimited contacts. Paid at $0.001 per email (about $10 per 10,000) with an optional monthly spend cap. Self-hosting is free.

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Plunk (https://www.useplunk.com) for this project, then use it only if it fits what we are already building.
Context: Open-source email for SaaS. Open-source email platform that wraps Amazon SES with transactional sending, automation workflows, campaign broadcasts and contact tracking. Every feature is available on every plan — nothing is gated. Run it as a managed cloud service or self-host it against your own SES account.
Reviewer notes (general, not written for this codebase): The cheapest honest per-email pricing here and no per-contact tax. Good when you want Loops-style automations without a $49/mo floor, or want to own the whole stack.
Watch out for: Small team and a much smaller ecosystem than Resend or Postmark. The free tier stamps Plunk branding on outgoing mail, and self-hosting means you personally own SES warm-up and reputation.
Pricing: Free: 1,000 emails/mo with Plunk branding and unlimited contacts. Paid at $0.001 per email (about $10 per 10,000) with an optional monthly spend cap. Self-hosting is free.
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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Neighbourhood

How Plunk sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.

Instead of thisDiscord Webhooks Formik React Email React Hook Form Slack Incoming Webhooks Basin Courier Fillout

Named in the wiringAmazon SES Loops

Also in Email, forms & notifications

Amazon SES

aws.amazon.com

Cheapest bulk email (AWS)

PaidEmail, forms & notifications

A la carte $0.10 per 1,000 emails. Essentials plan $0.16 per 1,000. Outbound attachment data $0.12/GB, managed dedicated IPs $15/mo. New AWS accounts get up to $200 in Free Tier credits.

Open dossier

Basin

usebasin.com

Form backend with spam blocking

Free tier + paidEmail, forms & notifications

Free: 50 submissions/mo, 1 form, 30-day retention. Starter $12.50/mo (250), Growth $24.17/mo (1,000, unlimited forms), Pro $30.62/mo (5,000), Agency $81.25/mo (25,000), billed yearly.

Open dossier

Courier

courier.com

Multi-channel notification API

Free tier + paidEmail, forms & notifications

Free Developer: 10,000 sends/mo. Business is usage-based at $0.005 per send beyond that. Enterprise is custom with volume discounts.

Open dossier

Discord Webhooks

docs.discord.com

Community alerts via webhook

FreeEmail, forms & notifications

Free. No bot user, OAuth or authentication required; standard Discord API rate limits apply per webhook.

Open dossier