Plunk pricing, price hikes and cheaper alternatives
Plunk (useplunk.com) is a email API. $0.001 per email, no base fee; open source. Free plan: 1,000 emails/mo.
What Plunk costs
- 10k emails / month: $10/mo
- 50k emails / month: $50/mo
- 100k emails / month: $100/mo
- 500k emails / month: $500/mo
- 1M emails / month: $1,000/mo
Plan compared: Pay as you go. Cheapest paid plan (plus overage when that's cheaper) covering the monthly volume, billed monthly. Contact-based pricing assumes 4 emails per contact.
Plunk price hikes
No price hikes on record for Plunk.
Cheaper alternatives to Plunk
At 100k emails/mo, Plunk costs $100/mo. 6 email APIs cost less:
- Amazon SES: $10/mo (À la carte, $0.10 per 1k (any account can switch to it))
- SendGrid: $34.95/mo (Essentials (Pro above 100k))
- Resend: $35/mo (Pro (Scale above 100k))
- MailerSend: $68/mo (Hobby + overage, then Starter)
- Mailgun: $75/mo (Basic, Foundation, then Scale)
- Brevo: $82/mo (Starter (Standard 500k, Professional 1M))
Plunk alternatives: 6 cheaper email APIs compared, at every size.
Sources
Pricing page: useplunk.com/pricing. Prices last checked Oct 16, 2026. Computed as emails × $0.001: Plunk's billing docs say you're charged per email sent after upgrading from the free tier. Emails with attachments count as 2. Self-hosting is free; you pay your own sending provider.