Plunk
Work on Plunk? Verify this listing (free)Open-source email platform for transactional and marketing email
Plunk combines a transactional email API, broadcasts and event-triggered automations in one open-source (AGPL-3.0) platform you can use hosted or self-host. The hosted free plan includes 1,000 emails a month with unlimited contacts (Plunk branding on emails); after that it is pay as you go at $0.001 per email with a monthly spend cap.
Best for: Indie SaaS that wants transactional plus lifecycle email in one tool, with the option to self-host
Visit Plunk ↗- Pricing
- Free 1,000 emails/mo; pay as you go $0.001 per email ($1 per 1,000), unlimited contacts; self-hosting free (AGPL-3.0)
- Free tier
- Yes: 1,000 emails/mo and unlimited contacts on the hosted plan (Plunk branding), or self-host for free
- Open source
- Yes
- Last verified
- 2026-10-24
Plunk pricing breakdown, history and cheaper alternatives →
Sources (checked 2026-10-24): useplunk.com/pricing · github.com/useplunk/plunk
Score breakdown
- Fit for the use case18 / 25
- Vibe-coder friendliness12 / 15
- Output quality & reliability9 / 15
- Pricing & free tier14 / 15
- Ecosystem & integrations5 / 10
- Momentum6 / 10
- Code ownership & lock-in9 / 10
Why this score: Simple per-email pricing, unlimited contacts and an AGPL-3.0 codebase (~5.5k GitHub stars) you can self-host. Smaller team and ecosystem than Resend or Postmark, and less deliverability track record.
Based on desk research of official pricing pages and docs; see methodology.
FAQ
- Is Plunk free?
- Plunk free tier: Yes: 1,000 emails/mo and unlimited contacts on the hosted plan (Plunk branding), or self-host for free. Paid pricing: Free 1,000 emails/mo; pay as you go $0.001 per email ($1 per 1,000), unlimited contacts; self-hosting free (AGPL-3.0).
- What is Plunk pricing in 2026?
- Plunk pricing (as of our last verification on 2026-10-24): Free 1,000 emails/mo; pay as you go $0.001 per email ($1 per 1,000), unlimited contacts; self-hosting free (AGPL-3.0). Always confirm on the official site — plans change.
- Is Plunk open source?
- Yes. Plunk is open source.
- What is Plunk's PromptToProd score?
- Plunk scores 73/100 on PromptToProd (fit, vibe-coder friendliness, quality, pricing, ecosystem, momentum, ownership). See the score breakdown on this page and our methodology.
- What is Plunk best for?
- Plunk is best for: Indie SaaS that wants transactional plus lifecycle email in one tool, with the option to self-host.
- When was Plunk last verified on PromptToProd?
- Pricing and details for Plunk were last verified on 2026-10-24 from official docs and pricing pages.
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