Postmark Pricing 2026: Plans, 16-Year History & Reviews
Transactional email delivery
Postmark Pricing 2026
Postmark offers three paid plans (Basic, Pro, Platform) all starting at 10,000 emails/month included. Emails above 10K are charged at per-1K overage rates that decrease with higher plans: Basic $1.80/1K, Pro $1.30/1K, Platform $1.20/1K. Free plan available at 100 emails/month.
Free Tier Available
Free plan with 100 emails per month. Includes API access and templates.
100 emails/month hard cap. No overage allowed on free plan.
Plan-based pricing with per-email overage charges Pricing
| Volume | Price | Notes |
|---|---|---|
| 100 emails/month | $0.00 (Free plan) | Monthly limit, not one-time. Hard cap — no overages on free plan. |
| 10,000 emails/month (Basic) | $15.00/month flat | Overage: $1.80/1K above 10K |
| 10,000 emails/month (Pro) | $16.50/month flat | Overage: $1.30/1K above 10K. Most Popular plan. |
| 10,000 emails/month (Platform) | $18.00/month flat | Overage: $1.20/1K above 10K. Best for multi-domain. |
Monthly Cost Examples
| Scenario | Est. Monthly Cost | Breakdown |
|---|---|---|
| Early-stage SaaS (3,000 emails/month) | $15/month (Basic) | Under 10K included. No overage. |
| Growing SaaS (35,000 emails/month on Pro) | $49 | Pro base $16.50 + 25K overage x $1.30/1K = $32.50 |
| Mid-market SaaS (100,000 emails/month on Pro) | $133.50 | Pro base $16.50 + 90K overage x $1.30/1K = $117 |
| High-volume (300,000 emails/month on Platform) | $366 | Platform base $18 + 290K overage x $1.20/1K = $348 |
| Volume spike: normally 30K/mo, one month 80K (Pro) | $107.50 during spike | Pro $16.50 + 70K overage x $1.30/1K = $91. Returns to ~$42.50 next month. |
Additional Costs
Quick Verdict
Bottom Line
Postmark is the premium transactional email service built around one promise: inbox delivery, fast. Plans start at $15/mo (Basic, 10K emails) with per-email overage pricing — Basic at $1.80/1K, Pro at $1.30/1K, Platform at $1.20/1K. Consistently rated the highest deliverability of any email API, and their support is genuinely exceptional.
Who Should Use It
- SaaS companies where transactional email reliability is critical (password resets, receipts, notifications)
- Teams that have struggled with deliverability on SendGrid or Mailgun
- Developers who value excellent documentation and responsive human support
- Companies sending 10K-300K emails/month wanting plan-based pricing with clear overage rates
Who Should Skip It
- Marketing teams needing campaign builders, drip sequences, or newsletters (Postmark is transactional-only)
- High-volume senders over 1M emails/month where Amazon SES ($0.10/1K) is dramatically cheaper
- Startups needing a real free tier for production use (free plan is only 100 emails/month)
- Teams already happy with SendGrid or Mailgun who don't have deliverability problems
What is Postmark?
Postmark has been a developer favorite since 2009, built on a single obsession: getting transactional emails to the inbox fast. Unlike Mailgun or SendGrid which serve both transactional and marketing email, Postmark is transactional-only — and that focus shows in deliverability benchmarks where Postmark consistently leads.
We've tracked Postmark's pricing across multiple snapshots. In early 2026, Postmark restructured from pure volume tiers to a plan-based model: Basic ($15/mo), Pro ($16.50/mo), and Platform ($18/mo) — all starting at 10,000 emails with different overage rates and feature sets.
The free plan gives you 100 emails/month. Production starts at $15/month (Basic) for 10,000 emails with $1.80/1K overage. The Pro plan ($16.50/mo) is the sweet spot with $1.30/1K overage and is marked "Most Popular."
Postmark also separates transactional and broadcast streams, so your transactional emails are never affected by bulk sending behavior.
*Pricing data sourced from [Postmark official pricing page](https://postmarkapp.com/pricing). Last verified February 23, 2026. We monitor this page automatically and update when changes are detected.*
Key Features That Affect Pricing
| Feature | Free | Pro | Business |
|---|---|---|---|
| Monthly Emails | 100/mo | 10,000+ (overage) | 10,000+ (overage) |
| Overage Rate | N/A | $1.30/1K (Pro) | $1.20/1K (Platform) |
| Transactional Streams | 1 | Multiple | Multiple |
| Broadcast Streams | Yes | Yes | |
| Dedicated IP | Add-on ($50/mo) | Add-on ($50/mo) | |
| Email Templates | Yes | Yes | Yes |
| Support Level | Community | Email & chat | Priority |
What Makes Postmark Different
- 1Best-in-class deliverability, consistently – Independent benchmarks repeatedly rank Postmark at the top for inbox delivery speed and rates. Strict anti-spam policies and isolated IP reputation pools per customer.
- 2Separate transactional and broadcast streams – Transactional email (password resets, receipts) and broadcast email (newsletters) use independent sending streams. High bounce rates from campaigns can't affect transactional delivery.
- 3Clear overage pricing — no per-email surprise – Each plan has a transparent overage rate: Basic $1.80/1K, Pro $1.30/1K, Platform $1.20/1K. You know exactly what extra emails cost before you send them.
Postmark Pricing Plans 2025
Free
Best for: Development, testing, and very small production apps
- 100 emails per month
- Full API access
- Transactional stream
- Email templates
Value Analysis: More restrictive than SendGrid's 100/day free tier but adequate for testing and tiny apps.
Basic
Best for: Small apps and early-stage products needing reliable transactional email
- 10,000 emails/month included
- Transactional and broadcast streams
- Template management
- Webhooks
- Email and chat support
Value Analysis: At $15/mo for 10K emails ($1.50/1K base), more expensive per email than SendGrid but Postmark's deliverability advantage justifies it for production transactional email.
Pro (Most Popular)
Best for: Growing SaaS products wanting the best balance of features and overage pricing
- 10,000 emails/month included
- Everything in Basic
- Lower overage rate ($1.30/1K)
- Custom activity retention (add-on)
- Dedicated IP eligible (add-on, 300K+ volume)
Value Analysis: Only $1.50/mo more than Basic but saves $0.50/1K on overages. At 50K emails/month: Basic costs $15 + $72 = $87 vs Pro $16.50 + $52 = $68.50. Pro is cheaper above ~13K emails/month.
Platform
Best for: Multi-tenant SaaS platforms and agencies managing multiple sending domains
- 10,000 emails/month included
- Everything in Pro
- Lowest overage rate ($1.20/1K)
- Multi-domain management
- Advanced API features
Value Analysis: Best overage rate at scale. At 100K emails/month: Platform costs $18 + $108 = $126 vs Pro $16.50 + $117 = $133.50. Only worth it above ~50K emails/month.
Hidden Costs to Watch Out For
- 1. Overage charges add up fast at Basic tier: Basic's $1.80/1K overage is 38% more than Pro's $1.30/1K. At 50K emails: $72 overage (Basic) vs $52 (Pro). Switch to Pro above ~13K emails/month.
- 2. Dedicated IP: $50/month add-on: Available only on Pro+ plans sending 300K+ monthly. Not included in any plan — a significant hidden cost for high-volume senders.
- 3. Broadcast volume counts toward limit: Broadcast (newsletter) emails count toward your 10K monthly included volume. Ensure your total estimate covers both streams.
- 4. DMARC monitoring: $14/month per domain: Add-on for domain-level email authentication monitoring. Required for enterprise compliance but often overlooked in budgeting.
Pro tip: The Pro plan ($16.50/mo) is almost always the right choice. For just $1.50/mo more than Basic, you save $0.50 per 1,000 emails on overages — the break-even is around 3,000 extra emails. If you're sending more than 13K emails/month, Pro is strictly cheaper.
Pros & Cons
Pros
- Industry-leading deliverability – Strict anti-spam enforcement and isolated sending pools mean consistently higher inbox rates vs competitors.
- Transparent overage pricing across all plans – Clear per-1K overage rates: Basic $1.80, Pro $1.30, Platform $1.20. Easy to predict costs at any volume.
- Transactional stream isolation – Separate sending streams for transactional and broadcast email. Newsletter bounces never hurt your password reset delivery.
- Exceptional support quality – Developer communities consistently praise Postmark for responsive, knowledgeable human support.
- Clean, focused product – No feature bloat. Transactional and broadcast email done extremely well, with excellent documentation.
Cons
- More expensive per email than competitors – At 50K emails, Postmark costs $55/mo vs Mailgun's $35/mo and SendGrid's $19.95/mo.
- Free plan is extremely limited – Only 100 emails/month — unlike SendGrid (100/day free) or Amazon SES (3K/mo free for 12 months). Production use requires a paid plan from day one.
- No marketing automation features – No drip campaigns, visual editor for non-developers, or CRM integrations. Need a separate platform for marketing email.
- Basic plan overage rate is steep – At $1.80/1K emails, Basic's overage is 38% more than Pro's $1.30/1K. Easy to accidentally overspend if you don't choose the right plan for your volume.
Our Take
Postmark is the right choice when email delivery reliability is non-negotiable. Transactional email infrastructure is a category where the cheapest option often creates more cost in engineering time and churn from users who didn't receive critical emails. Postmark charges a premium, delivers on it, and has done so consistently since 2009.
Is Postmark Right for You?
SaaS Founders (Early Stage)
Start with Basic ($15/mo). If you're sending more than ~13K emails, switch to Pro ($16.50/mo) to save on overages.
Recommended: Basic or Pro
Monthly cost: $15-$16.50/month
Higher email delivery = better onboarding conversion rates
Mid-Stage SaaS (10K-100K emails/mo)
Pro plan ($16.50/mo) is the best value. At 50K emails: $68.50/mo total vs Basic's $87/mo.
Recommended: Pro (Most Popular)
Monthly cost: $49-$134/month
Lower overage rate saves $200+/year vs Basic at this volume
Enterprise / High Volume (300K+ emails/mo)
Platform plan ($18/mo) with dedicated IP add-on ($50/mo). At 300K: ~$416/mo total.
Recommended: Platform + Dedicated IP
Monthly cost: $366-$700+/month
Dedicated IP reputation + lowest overage rate at scale
Budget-Conscious Startups
If cost is the primary constraint, consider Amazon SES ($0.10/1K) or Mailgun ($15/mo for 10K). Move to Postmark when deliverability problems hurt.
Recommended: Start with alternatives
Monthly cost: $0-$15/month
Skip Postmark If:
- •You need marketing campaign features, A/B testing, or drag-and-drop email editors
- •You're sending over 1 million emails/month and Amazon SES is materially better for unit economics
- •You have no deliverability issues on your current provider
- •You need a CRM + email in one platform (use HubSpot or ActiveCampaign)
Postmark Alternatives & Competitors
| Tool | Starting Price | Free Tier | Best For | Key Difference |
|---|---|---|---|---|
| CurrentPostmark | $15/mo (10K), $55/mo (50K) | Best deliverability, transactional-only focus | No overage charges, stream isolation, premium support | |
| Mailgun | $35/mo (50K emails) | Developer API with email validation | Cheaper at 50K+, includes email validation | |
| SendGrid | $19.95/mo (50K emails) | Transactional + marketing in one platform | Cheapest paid plan for 50K, also handles marketing | |
| Amazon SES | $0.10/1K emails (no monthly fee) | Cheapest at scale, AWS ecosystem | Dramatically cheaper for high volume, no managed support |
Detailed Comparisons
Postmark vs Mailgun
Deliverability is critical and you want stream isolation between transactional and broadcast
You're sending 50K+ emails/month and want built-in email validation. Mailgun Foundation ($35/mo) is 37% cheaper
Postmark vs SendGrid
You've experienced deliverability issues with SendGrid, or you want separate transactional/broadcast streams
You need marketing campaigns alongside transactional, or cost is the primary driver
Postmark vs Amazon SES
You want fully managed service with dedicated support, templates, and webhooks without AWS configuration overhead
You're sending 500K+ emails/month and cost matters — SES ($50/mo) vs Postmark ($450/mo) is a $400/month difference
Frequently Asked Questions
Pricing & Plans
How does Postmark pricing work?
Is Postmark free?
How much does Postmark cost for 50,000 emails?
What happens if I go over my limit?
Deliverability & Features
Why is Postmark considered to have the best deliverability?
Does Postmark include dedicated IPs?
Can I use Postmark for marketing emails?
Official Pricing Screenshots
Screenshots captured from official Postmark pricing page. Prices may have changed.
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