Postmark
NewThe email delivery service that people actually like
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
- Postmark ranks #29 of 55 in Email Marketing with an AI visibility score of 1.9 (SlateIndex, Nov 2, 2026).
- Postmark is most visible on ChatGPT (2.6) and least on Google AI Mode (1.1).
- AI engines name Postmark in 4 of the 30 Email Marketing buyer prompts SlateIndex tracks.
- sequenzy.com is the source AI engines cite most in answers about Postmark, with 6 citations.
About
Company details for Postmark
Postmark is an email delivery service for developers that sends transactional and marketing email through an SMTP service and an API. It keeps transactional and broadcast mail on separate message streams, processes inbound email, and offers DMARC monitoring. ActiveCampaign acquired Postmark in May 2022. It ranks #29 of 55 in Email Marketing on SlateIndex and has a visibility score of 1.9 in the latest weekly run.
Its differentiator: vets every new sender and keeps transactional and marketing email on separate message streams.
- Website
- postmarkapp.com
- Categories
- Email Marketing
- Founded
- 2010
- Company type
- Division of ActiveCampaign
- Pricing
- Free; paid from $15 / mo · usage-based
- Free trial
- Free plan available
- Deployment
- Cloud
- Compliance
- GDPR
- Support
- Contact form
Read from postmarkapp.com, capterra.co.uk, businesswire.com · refreshed Nov 2, 2026.
AI visibility
Latest weekly run · Nov 2 · next run Nov 9
Visibility score trend
Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.
Changes appear after the second weekly run in Email Marketing. Mailchimp leads the category at 45.4%.
Media
Website and product screenshots for Postmark
AI mentions & citations
Recent answers that name Postmark
What should an email marketing platform integrate with?
Examples: Amazon SES, Postmark, SendGrid.
Best email marketing platform for enterprise
Twilio SendGrid / Postmark
Top email marketing platform options for B2B SaaS companies
Use Postmark or SendGrid alongside a marketing platform when transactional email reliability is a major requirement.
Best email marketing platform for startups
Top email marketing platform options for B2B SaaS companies
For transactional infrastructure, consider Postmark or Resend alongside your marketing platform.
Products & features
What Postmark sells
Postmark transactional email (API and SMTP)
Sends transactional email through a REST API or SMTP, with delivery and activity tracking.
Message Streams
Separate sending infrastructure for broadcast and marketing email, kept apart from transactional mail.
Inbound email processing
Turns inbound email into JSON and posts it to a webhook URL.
DMARC Digests
DMARC monitoring that shows who sends email using your domain and helps fix authentication issues.
Strengths engines cite
- recommended for transactional email
- suited to reliable transactional email
Target market & buyers
Solo developers, start-ups, small businesses, agencies and larger teams that send transactional email
Notable customers include Paddle, Indie Hackers, Faire.com, IKEA, UNICEF, Asana, Moz, Code Climate.
Competitive landscape
How Postmark compares with its top three alternatives
Postmark most often appears alongside HubSpot, ActiveCampaign, Salesforce in AI answers.
| Brand | Visibility | Share of voice | vs last week | Starting price |
|---|---|---|---|---|
| Postmark | 1.9% | 0.9% | New | Free plan |
| HubSpot | 73.1% | 13.1% | New | Free plan |
| ActiveCampaign | 44% | 9.3% | New | Contact sales |
| Salesforce | 46.2% | 9.6% | New | Pricing not available |
| Mailchimp | 45.4% | 9.6% | New | Free plan |
Pricing
Usage-based pricing with a free plan
Cite as: SlateIndex, “Postmark AI visibility profile”, https://slateindex.ai/brand/postmark, data of Nov 2, 2026. Licence: CC BY 4.0.