ActiveCampaign Postmark
- Company typePrivate
- Founded2010
- HeadquartersChicago, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What ActiveCampaign Postmark does
Postmark is a transactional email delivery service that operates as a product within ActiveCampaign following its 2022 acquisition. The company provides developers and product teams with reliable, fast email infrastructure for time-sensitive messages such as password resets, order confirmations, notifications, magic links, and authentication codes. Its core differentiation is the Message Streams architecture, which routes transactional and promotional email through separate parallel infrastructure to protect deliverability of critical messages, and a focus on sub-second delivery speeds. Postmark was founded in 2010 under Wildbit LLC and bootstrapped for 12 years before being acquired by ActiveCampaign in 2022.
The platform is built on cloud infrastructure (AWS and Deft data centers) and recently migrated its core mail transfer agent to KumoMTA, an open-source Rust-based MTA, achieving average queue times of approximately 1.2 seconds for Gmail, 3.2 seconds for Yahoo, 2.8 seconds for Microsoft, and 6.3 seconds for Apple. The product surface includes an Email API (REST), SMTP service, Email Templates with Handlebars syntax, Inbound Email parsing, Webhooks, a Bulk API, bounce handling (Rebound), DMARC Digests for authentication monitoring, Dedicated IPs, Sandbox Mode, and a Retention Add-On for customizable 7-365 day data retention. Official SDKs are available across Python, Ruby, Node.js, PHP, .NET, Java, and Rails, with integrations across WordPress, Craft CMS, Laravel, Magento, Drupal, Zapier, Postman, and Shopify.
Postmark monetizes primarily through subscription plans with monthly email send limits and overage charges, supplemented by paid add-ons (Retention Add-On, Dedicated IPs). The go-to-market is API-first and product-led growth, with self-serve signup requiring no credit card for free trial, comprehensive developer documentation, comparison pages against SendGrid, Mailgun, Amazon SES, SparkPost, Mandrill, and Resend, and an enterprise sales overlay. Customers span startups, agencies, enterprises, and bootstrapped businesses, with named logos including Paddle, Indie Hackers, Faire.com, IKEA, UNICEF, Asana, 1Password, Webflow, Wistia, Betterment, Moz, and LiveChat. The company reports a 95% customer happiness rating and operates as a remote-first team of 11-50 employees.
ActiveCampaign Postmark firmographics
Firmographics- Name
- ActiveCampaign Postmark
- Legal name
- AC PM, LLC
- Website
- https://postmarkapp.com
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
ActiveCampaign Postmark industry classification
Industry- Product category
- Transactional Email Delivery
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Processing & Data Preparation (7374)
- akta.pro primary industry
- Email Marketing Services (Campaigns, Deliverability, Lifecycle) (BPAFAKAB)
Keywords
Where ActiveCampaign Postmark is headquartered
LocationHeadquarters
- HQ city
- Chicago
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
ActiveCampaign Postmark business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations
Revenue model
- Subscription Plans: Plan-based billing with monthly or annual subscription options. Plans include monthly email send limits with additional charges for overages. Unused emails expire at end of month. Supports upgrades and downgrades.
- Retention Add-on: Optional paid add-on to customize data retention from 7-365 days instead of default 45 days
- Dedicated IPs: Optional dedicated IP addresses available for enterprise customers requiring separate sending infrastructure
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Plan-based subscription with email send limits |
| Subscription | Monthly | Retention Add-on for data retention customization |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels8 records
ActiveCampaign Postmark product offering
Product offeringCore offering
Postmark provides a cloud-based transactional email delivery platform offering an Email API and SMTP service for sending time-sensitive emails such as password resets, order confirmations, and notifications. The platform uses Message Streams to separate transactional and promotional traffic through parallel infrastructure, protecting sender reputation and ensuring fast, reliable inbox delivery.
Product overview
Postmark is a transactional email delivery platform offering a comprehensive suite of email services built around reliable, fast deliverability. The core offering consists of the Email API and SMTP Service, supplemented by Message Streams that separate transactional and broadcast email traffic to protect deliverability. Key supporting features include Email Templates (with Handlebars syntax and layout inheritance), Inbound Email processing, Analytics & Retention (45-day default with add-on options), Webhooks for real-time event notifications, and the Bulk API for high-volume campaigns. The platform also offers specialized services like DMARC Digests for authentication monitoring, Dedicated IPs for reputation control, and Sandbox Mode for testing. All services are backed by a REST API with official SDKs for major programming languages and integrations with platforms like WordPress, Craft CMS, Laravel, Magento, Drupal, and Zapier.
Differentiator
Problem solved
Functional benefit
Quantifiable outcome
- Gmail queue time reduced to ~1.2 seconds with KumoMTA migration
- +3 more outcomes
Companies that use ActiveCampaign Postmark
Customer profileNamed customers16 records
Segments5 records
Ideal customer profiles4 records
ActiveCampaign Postmark technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration8 records
AI capability5 records
Feature8 records
ActiveCampaign Postmark partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- ActiveCampaignflagshipPostmark was acquired by ActiveCampaign in 2022. Postmark operates as a product under ActiveCampaign, with Postmark's infrastructure and expertise enhancing ActiveCampaign's email delivery capabilities while Postmark gains access to ActiveCampaign's marketing automation resources and customer base.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
ActiveCampaign Postmark competitors and assessment
Company assessmentDirect peers
- Twilio SendGrid: Twilio-owned email API and SMTP service for transactional and marketing email; Postmark explicitly publishes comparison/migration pages against SendGrid, making them the closest direct competitor.
- Mailgun: Developer-focused transactional and marketing email API owned by Sinch/RocketReach; cited by Postmark customer testimonials as a frequent migration source and compared directly on Postmark's site.
- Resend: Developer-first transactional email API built for modern frameworks and AI-driven applications; Postmark has a dedicated comparison page positioning against Resend, signaling them as a primary emerging competitor.
- Mandrill (by Mailchimp): Mailchimp's transactional email API built for apps; directly comparable to Postmark and called out in Postmark's comparison content as a feature-by-feature competitor.
- SparkPost: Enterprise-focused transactional and marketing email delivery platform; featured in Postmark's comparison pages as a direct alternative for high-volume senders.
- SMTP.com: Long-standing transactional and bulk email delivery provider for SMB and enterprise; competes with Postmark on reliability, deliverability, and dedicated IP offerings.
Broad incumbents
- Brevo (Sendinblue): Multi-channel marketing platform with transactional email and SMTP/API offerings alongside marketing automation; overlaps with Postmark's broadcast/transactional split from a broader suite position.
- Amazon SES: AWS-managed email sending service offering transactional/bulk email at hyperscaler pricing; competes with Postmark on raw deliverability economics and is featured as a Postmark comparison/migration target.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
ActiveCampaign Postmark social profiles
Digital presenceActiveCampaign Postmark financial estimates
Financial estimateRevenue estimate
Valuation estimate
ActiveCampaign Postmark leadership team
Management profileNumber of profiles
Profiles1 record
ActiveCampaign Postmark funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ActiveCampaign Postmark M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ActiveCampaign Postmark
What does ActiveCampaign Postmark do?
Postmark provides a cloud-based transactional email delivery platform offering an Email API and SMTP service for sending time-sensitive emails such as password resets, order confirmations, and notifications. The platform uses Message Streams to separate transactional and promotional traffic through parallel infrastructure, protecting sender reputation and ensuring fast, reliable inbox delivery.
Is ActiveCampaign Postmark a public or private company?
ActiveCampaign Postmark is a private company. It is classified as corporate owned and is currently operating.
When was ActiveCampaign Postmark founded?
ActiveCampaign Postmark was founded in 2010. It employs 11 to 50 people.
Where is ActiveCampaign Postmark based?
ActiveCampaign Postmark is headquartered in Chicago, United States, in the North America region.
How does ActiveCampaign Postmark make money?
Three revenue lines are on record. Subscription Plans are the primary driver. The others are retention Add-on and dedicated IPs.
Who are ActiveCampaign Postmark's main competitors?
Direct peers on record are Twilio SendGrid, Mailgun, Resend, Mandrill (by Mailchimp), SparkPost and SMTP.com. Broad incumbents are Brevo (Sendinblue) and Amazon SES.
Does ActiveCampaign Postmark have an API?
Yes. REST API for sending transactional and broadcast emails, managing templates, webhooks, bounces, message streams, domains, sender signatures, statistics, suppresstions, and data removal. Supports JSON format with X-Postmark-Server-Token and X-Postmark-Account-Token authentication. Includes official SDKs for Node.js, Python, Ruby, PHP, .NET, Java, and Rails. Also offers a Postman Collection for testing API calls and AI Prompts for common integration tasks. Developer documentation is at postmarkapp.com/developer.
What industry is ActiveCampaign Postmark in?
ActiveCampaign Postmark's product category is Transactional Email Delivery. Its primary akta.pro industry code is BPAFAKAB, Email Marketing Services (Campaigns, Deliverability, Lifecycle). Its NAICS code is 5182 and its SIC code is 7370.