# MailerSend vs Postmark

**Leader by vioscaleAI score:** MailerSend

| Attribute | MailerSend | Postmark |
|---|---|---|
| **vioscaleAI score** | 67 (63% (medium)) | 59.9 (48% (low)) |
| content.faq | `[{"answer":"Transactional messaging service for reliably delivering emails, text messages, and WhatsApp communications via API or SMTP integration. It is indexed under Communication APIs.","source":"https://www.mailersend.com/pricing-pl","question":"What is MailerSend?","confidence":0.6},{"answer":"MailerSend offers a free tier, so you can start without paying. Paid plans start at $0.90. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://www.mailersend.com/pricing-pl","question":"Is MailerSend free?","confidence":0.6},{"answer":"MailerSend supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.mailersend.com/pricing-pl","question":"What platforms does MailerSend support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for MailerSend, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.mailersend.com/pricing-pl","question":"Can MailerSend be self-hosted?","confidence":0.6},{"answer":"We have confirmed 33 integrations for MailerSend, including Zapier, Supabase, Firebase, Symfony, Slack, Laravel, Airbyte and Airtable, plus 25 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.mailersend.com/pricing-pl","question":"What does MailerSend integrate with?","confidence":0.6},{"answer":"We have independently confirmed ISO 27001 and GDPR for MailerSend. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as MailerSend not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.mailersend.com/pricing-pl","question":"What security certifications does MailerSend have?","confidence":0.6},{"answer":"MailerSend is available worldwide. Its primary markets are the United States and the United Kingdom. The vendor is headquartered in the United States.","source":"https://www.mailersend.com/pricing-pl","question":"Where is MailerSend available?","confidence":0.75}]` | `[{"answer":"A service for reliably sending transactional emails from applications using REST API or SMTP, with libraries available for multiple programming languages. It is indexed under Communication APIs.","source":"https://postmarkapp.com","question":"What is Postmark?","confidence":0.6},{"answer":"Postmark offers a free tier, so you can start without paying. Paid plans start at $1.20. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://postmarkapp.com","question":"Is Postmark free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Postmark. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://postmarkapp.com","question":"What platforms does Postmark support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Postmark, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://postmarkapp.com/blog/announcing-lower-pricing-and-monthly-plans","question":"Can Postmark be self-hosted?","confidence":0.6},{"answer":"We have confirmed 21 integrations for Postmark, including Mailcoach, Datadog, Craft CMS, Customer.io, ActiveCampaign, Supabase, Bubble and Figma, plus 13 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://postmarkapp.com/blog/announcing-lower-pricing-and-monthly-plans","question":"What does Postmark integrate with?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Postmark. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Postmark not holding them. Always confirm compliance directly before you rely on it.","source":"https://postmarkapp.com/eu-privacy","question":"What security certifications does Postmark have?","confidence":0.7},{"answer":"Postmark is available worldwide. The vendor is headquartered in the United States.","source":"https://postmarkapp.com/blog/announcing-lower-pricing-and-monthly-plans","question":"Where is Postmark available?","confidence":0.75}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | A cloud messaging platform that enables developers to send transactional emails and text messages through an API, with built-in tools for managing delivery and tracking engagement | Postmark is a transactional email service that connects with popular CMS platforms, marketing automation tools, forms providers, and business applications to send reliable emails across your workflows. |
| features.capabilities | `{"sms":true,"email":true,"two_way":true,"whatsapp":true,"verify_otp":true,"global_coverage":"regional","deliverability_tools":true,"usage_pricing_transparent":true}` | `{"email":true,"two_way":true,"global_coverage":"global","deliverability_tools":true,"usage_pricing_transparent":true}` |
| integrations.count | 33 | 21 |
| integrations.list | `[{"name":"Zapier"},{"name":"Supabase"},{"name":"Firebase"},{"name":"Symfony"},{"name":"Slack"},{"name":"Laravel"},{"name":"Airbyte"},{"name":"Airtable"},{"name":"Anymail"},{"name":"ChatGPT"},{"name":"Claude"},{"name":"Courier"},{"name":"Cursor"},{"name":"Django"},{"name":"Google Cloud"},{"name":"Integrately"},{"name":"Knock"},{"name":"Magento"},{"name":"Mailster"},{"name":"Make"},{"name":"NocoDB"},{"name":"Novu"},{"name":"Pabbly Connect"},{"name":"Partnero"},{"name":"Pipedream"},{"name":"Rails"},{"name":"React Email"},{"name":"Relay.app"},{"name":"Tabular"},{"name":"VSCode"},{"name":"WHMCS"},{"name":"WooCommerce"},{"name":"WordPress"}]` | `[{"name":"Mailcoach"},{"name":"Datadog"},{"name":"Craft CMS"},{"name":"Customer.io"},{"name":"ActiveCampaign"},{"name":"Supabase"},{"name":"Bubble"},{"name":"Figma"},{"name":"Google Sheets"},{"name":"Gravity Forms"},{"name":"Gravity SMTP for WordPress"},{"name":"Netlify"},{"name":"Slack"},{"name":"Stripe"},{"name":"Stripo"},{"name":"Typeform"},{"name":"WordPress"},{"name":"WP Mail SMTP"},{"name":"Zapier"},{"name":"Tabular"},{"name":"SureTriggers"},{"name":"Marka Email Generator"}]` |
| market.availability | `{"hqCountry":"US","primaryMarkets":["US","GB"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free, 500 emails/month","features":["Email API and SMTP relay","Email threading support","Drag-and-drop email builder","1,000 API requests per day","1 domain","10 templates"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For personal projects and testing","contactSales":false,"includedLimits":{"emails":"500/month"}},{"free":false,"name":"Hobby","summary":"$7/month","features":["Everything in Free, plus","User roles and permissions","24-hour data retention","10 templates","1-day activity log retention","1,000 API requests per day"],"components":[{"kind":"fixed","amount":7,"period":"month","currency":"USD"}],"description":"For personal projects and side projects","contactSales":false,"includedLimits":{"sms":"100/month","emails":"500/month"}},{"free":false,"name":"Starter","features":["Everything in Hobby, plus","50 sender identities","Inbound routing","SMS API (US and Canada)","5 users","250 templates","7-day activity retention","100,000 API requests per day"],"description":"For growing startups and small businesses","contactSales":false},{"free":false,"name":"Professional","summary":"$25/month + $0.90 per 1,000 additional emails","features":["Everything in Starter, plus","1,000 domains","Unlimited templates","High-throughput API","Unlimited users","30-day activity retention","500,000 API requests per day"],"components":[{"kind":"fixed","amount":25,"period":"month","currency":"USD"},{"per":{"qty":1000,"unit":"emails"},"kind":"metered","amount":0.9,"currency":"USD"}],"description":"For agencies and white-label resellers sending at scale","contactSales":false}],"addOns":[{"name":"WhatsApp messaging"},{"name":"Email verification credits"},{"name":"Domain spaces","components":[{"kind":"fixed","amount":4,"period":"month","currency":"USD"}]},{"name":"Phone numbers (SMS)","components":[{"kind":"fixed","amount":2,"period":"month","currency":"USD"}]},{"name":"DMARC domain monitoring","components":[{"kind":"fixed","amount":5,"period":"month","currency":"USD"}]}],"summary":"From $7/month. Free tier with 500 emails/month. 14-day free Professional trial.","currency":"USD","freeTier":true,"sourceUrl":"https://www.mailersend.com/pricing-pl","retrievedAt":"2026-09-03T22:55:26.093Z","freeTrialDays":14,"startingPrice":{"amount":7,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"$0/mo","features":["100 emails/month","REST API","SMTP","Transactional email","Sandbox Mode","Up to 10 custom domains","45-day retention","Up to 10 users"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For testing and evaluation","contactSales":false,"includedLimits":{"emails":"100/mo"}},{"free":false,"name":"Basic","summary":"$15/mo + $1.80 per 1,000 overage emails","features":["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"],"components":[{"kind":"fixed","amount":15,"period":"month","currency":"USD"},{"per":{"qty":1000,"unit":"emails"},"kind":"metered","amount":1.8,"currency":"USD"}],"description":"For solo developers and smaller teams","contactSales":false,"includedLimits":{"emails":"10,000/mo"}},{"free":false,"name":"Pro","summary":"$16.50/mo + $1.30 per 1,000 overage emails","features":["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"],"components":[{"kind":"fixed","amount":16.5,"period":"month","currency":"USD"},{"per":{"qty":1000,"unit":"emails"},"kind":"metered","amount":1.3,"currency":"USD"}],"description":"For startups and small businesses","contactSales":false,"includedLimits":{"emails":"10,000/mo"}},{"free":false,"name":"Platform","summary":"$18/mo + $1.20 per 1,000 overage emails","features":["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"],"components":[{"kind":"fixed","amount":18,"period":"month","currency":"USD"},{"per":{"qty":1000,"unit":"emails"},"kind":"metered","amount":1.2,"currency":"USD"}],"description":"For agencies and larger teams","contactSales":false,"includedLimits":{"emails":"10,000/mo"}}],"addOns":[{"name":"Dedicated IPs","components":[{"kind":"fixed","amount":50,"period":"month","currency":"USD"}]},{"name":"Custom activity retention","components":[{"kind":"fixed","amount":5,"period":"month","currency":"USD"}]}],"summary":"From $15/mo. Free tier with 100 emails/month. Pay-as-you-go overages starting at $1.80 per 1,000 emails.","currency":"USD","freeTier":true,"sourceUrl":"https://postmarkapp.com","retrievedAt":"2026-08-05T14:11:12.615Z","startingPrice":{"amount":1.2,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | unknown | low |
| pricing.starting_price | `{"amount":7,"currency":"USD"}` | - |
| pricing.transparent | yes | yes |
| reliability.sla_pct | 99.5 | - |
| reliability.status_page | yes | yes |
| security.certifications | `[{"name":"ISO 27001","status":"active"}]` | - |
| security.gdpr | yes | yes |
| security.iso27001 | yes | - |
| security.pci | yes | - |

## Capabilities (Communication APIs)

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

*Source: vioscaleAI. Generated 2026-10-16T20:08:19.881Z. "-" = undocumented, not absent.*