Email APIs · side by side
Mandrill vs Plunk
Compare Mandrill, Plunk by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
0
Mandrill
$0 / mo
Try for free · 0 emails
Plunk
$0 / mo
Pay as you grow · 0 emails
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | Mandrill | Plunk |
|---|---|---|
| Provider | Mailchimp | Plunk |
| Billing unit | emails | emails |
| Plan at selected usage | Try for free | Pay as you grow |
| Monthly estimate | $0/mo | $0/mo |
| Workload | 0 emails | 0 emails |
| Free access | Up to 500 free demo/test email sends to a verified domain for new users. | Developer free allowance |
| Published plans | Try for free, Transactional Email | Pay as you grow, Free forever |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Mandrill
- Mailchimp
- Plunk
- Plunk
Billing unit
- Mandrill
- emails
- Plunk
- emails
Plan at selected usage
- Mandrill
- Try for free
- Plunk
- Pay as you grow
Monthly estimate
- Mandrill
- $0/mo
- Plunk
- $0/mo
Workload
- Mandrill
- 0 emails
- Plunk
- 0 emails
Free access
- Mandrill
- Up to 500 free demo/test email sends to a verified domain for new users.
- Plunk
- Developer free allowance
Published plans
- Mandrill
- Try for free, Transactional Email
- Plunk
- Pay as you grow, Free forever
Prices checked
- Mandrill
- 2026-10-08
- Plunk
- 2026-10-08
Email APIs monthly cost
Mandrill: $0Plunk: $0
Cost by emails
Cost curve data
| emails | Mandrill | Plunk |
|---|---|---|
| 0 | $0 | $0 |
| 0 | $0 | $0 |
| 0 | $0 | $0 |
| 0 | $0 | $0 |
| 0 | $0 | $0 |
| 0 | $0 | $0 |
| 0 | $0 | $0 |
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
0
- Mandrill
- $0
- Plunk
- $0
Which email providers fit your needs?
Mandrill features & plan notes
- Send transactional emails via REST API or SMTP credentials
- Sold in blocks of 25,000 emails with volume discounts from $20 down to $10 per block
- Inbound email processing and real-time event webhooks
- Custom domain whitelabeling, dedicated IPs, and rules engine
- Up to 500 free email sends to your verified domain
- Streamlined template editing with drag and drop builder
- Developer documentation, guides, and SDK repositories
- Connect AI coding assistant directly through first-party MCP server
Plunk features & plan notes
- Open source
- Simple API
- AWS SES infrastructure
- Everything in Free
- No Plunk branding
- Monthly spend cap
- Unlimited emails
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricing