# Postmark

- **Canonical URI:** https://www.vioscale.ai/software/postmark
- **Category:** Communication APIs
- **Homepage:** https://postmarkapp.com
- **Also known as:** postmark
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-05T14:19:08.623Z

## Vioscale score

**66.9 / 100**, confidence 29% (low).

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 80 | 0.047 | 3.8 | ✓ |
| reliability | 50 | 0.175 | 8.8 | ✓ |
| capabilities | 67.1 | 0.07 | 4.7 | ✓ |
| integrations | 0 | 0.094 | 0 | - |
| security_posture | 5 | 0.129 | 0 | - |
| pricing_transparency | 100 | 0.07 | 7 | ✓ |

## Pricing

_As of 2026-08-05, [verify at source](https://postmarkapp.com). Independently observed._

from $1.20/mo · Subscription · Free tier

> From $15/mo. Free tier with 100 emails/month. Pay-as-you-go overages starting at $1.80 per 1,000 emails.

| Plan | Price | Free | Commitment |
|---|---|:--:|---|
| Free | Free | ✓ | - |
| Basic | $15/mo + $1.80 per 1,000 overage emails | - | - |
| Pro | $16.50/mo + $1.30 per 1,000 overage emails | - | - |
| Platform | $18/mo + $1.20 per 1,000 overage emails | - | - |

### Free

For testing and evaluation

**Included limits:** emails: 100/mo

- 100 emails/month
- REST API
- SMTP
- Transactional email
- Sandbox Mode
- Up to 10 custom domains
- 45-day retention
- Up to 10 users

### Basic

For solo developers and smaller teams

**Included limits:** emails: 10,000/mo

- 10,000+ emails/month
- Industry-leading deliverability
- 45-day retention
- 5 custom domains
- Unlimited emails/day
- Detailed analytics
- Up to 4 users
- Up to 15 message streams

### Pro

For startups and small businesses

**Included limits:** emails: 10,000/mo

- 10,000+ emails/month
- Industry-leading deliverability
- Customizable retention up to 365 days
- 10 custom domains
- Unlimited emails/day
- Inbound email processing
- Bulk Email API
- Detailed analytics
- Up to 6 users
- Up to 30 message streams

### Platform

For agencies and larger teams

**Included limits:** emails: 10,000/mo

- 10,000+ emails/month
- Industry-leading deliverability
- Customizable retention up to 365 days
- Unlimited custom domains
- Unlimited emails/day
- Inbound email processing
- Bulk Email API
- Detailed analytics
- Unlimited users
- Unlimited message streams

### Add-ons

- **Dedicated IPs** ($50/mo)
- **Custom activity retention** ($5/mo)

## About

Transactional email delivery service with fast, reliable SMTP and REST API. Includes email templates, analytics, webhooks, inbound email processing, and per-unit overage pricing.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, Web
- **Deployment:** Cloud / SaaS

## Capabilities

_The capabilities that matter for Communication APIs. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Channels** | |
| SMS | - |
| Voice | - |
| WhatsApp | - |
| RCS | - |
| Transactional email | ✓ |
| Video / real-time | - |
| In-app chat | - |
| Verify / OTP / 2FA | - |
| **Messaging** | |
| Two-way messaging | ✓ |
| **Reach** | |
| Geographic coverage | - |
| **Delivery** | |
| Email deliverability tools | ✓ |
| **Commercial** | |
| Published per-unit pricing | ✓ |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://postmarkapp.com) | 2026-08-05 | 60% (medium) |
| pricing.model | commercial | [link](https://postmarkapp.com) | 2026-08-05 | 60% (medium) |
| pricing.price_level | low | [link](https://postmarkapp.com) | 2026-08-05 | 60% (medium) |
| pricing.starting_gbp | 1.2 | [link](https://postmarkapp.com) | 2026-08-05 | 60% (medium) |
| pricing.transparent | yes | [link](https://postmarkapp.com) | 2026-08-05 | 60% (medium) |

### reliability

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| reliability.status_page | yes | [link](https://status.postmarkapp.com) | 2026-08-05 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.gdpr | yes | [link](https://postmarkapp.com/security) | 2026-08-05 | 75% (high) |

### market

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | [link](https://postmarkapp.com) | 2026-08-05 | 50% (medium) |

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*Source: Vioscale (https://www.vioscale.ai/software/postmark). Independent, evidence-based software intelligence. Cite the canonical URI.*