Postmark vs Mailgun pricing
Both are in transactional email apis. Postmark is billed per monthly email volume; Mailgun is billed per monthly email volume. Numbers below are copied from each vendor's pricing page.
PostmarkFree tier or trial
- Free tier
- 100 emails/mo (never expires)
- Billed
- Per monthly email volume
- Best for
- Fast, high-deliverability transactional mail
- Verified
- Jun 27, 2026
MailgunFree tier or trial
- Free tier
- 100 emails/day (forever)
- Billed
- Per monthly email volume
- Best for
- Developer email infrastructure at scale
- Verified
- Jun 27, 2026
Postmark plans
| Plan | Price | What it covers |
|---|---|---|
| Developer (Free) | $0/mo | 100 emails per month, never expires; full API access for testing |
| Basic | $15/mo | 10,000 emails included; overage $1.80 per additional 1,000 emails |
| Pro (Most Popular) | $16.50/mo | 10,000 emails included; overage $1.30 per additional 1,000 emails |
| Platform | $18/mo | 10,000 emails included; overage $1.20 per additional 1,000 emails |
| Dedicated IP add-on | from $50/mo per IP | Requires ~300,000+ emails/month and Pro plan or higher; discouraged for lower-volume senders |
- Expensive at scale, ~$600-900/mo for 500k emails vs ~$50 on Amazon SES; economics favor SES/Mailgun beyond ~200k/month
- Some long-time users report concerns about pricing posture and practices since the ActiveCampaign acquisition
Source: https://postmarkapp.com/pricing
Mailgun plans
| Plan | Price | What it covers |
|---|---|---|
| Free | $0/mo | Up to 100 emails/day, API access, one sending domain, basic tracking, ticket support |
| Basic | from $15/mo | 10,000 emails/month, no daily limit, webhooks, one custom domain, two API keys; ~$1.80/1K overage |
| Foundation | $35/mo | 50,000 emails/month, email templates, up to 1,000 sending domains, 5-day log retention; ~$1.30/1K overage |
| Scale | $90/mo | 100,000 emails/month, 5,000 validations, dedicated IPs, send-time optimization, live chat, 30-day log retention; ~$1.10/1K overage |
| Enterprise | Custom (contact sales) | High-volume senders, burst/rapid-fire sending SLA, custom infrastructure and response-time SLAs |
- Pricing escalates steeply with volume; reviewers say it has gotten 'pricier and pricier'
- Legacy pay-as-you-go Flex plan doubled to $2.00/1K in Dec 2025 and is closed to new users
- Support quality is inconsistent on lower tiers despite a high review-response rate
Source: https://www.mailgun.com/pricing/