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MailerSend

mailersend.com

From $7/mo Free plan WebiOSAPI
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Spec score 9.0 #1 of 31 in Email APIs

What it is

MailerSend delivers transactional email through an email API and SMTP relay. Its editing tools include drag-and-drop, HTML and rich-text editors, along with dynamic templates and split testing. Webhooks, tracking, real-time activity, analytics and suppression-list management support monitoring. Inbound routing can parse replies into application events and route them to an app for further action. Integrations listed include Zapier, Supabase, Firebase, Slack, Laravel, WooCommerce, WordPress, ChatGPT and Claude. The Free plan is free and allows 500 emails per month, 100 daily API requests, one domain and one template. Hobby costs $5.60 a month, billed $67.20 yearly, and includes 5,000 emails per month. The pricing note lists paid plans from $7/mo. A 14-day Professional trial includes 500 emails per month, 100 daily API requests and one day of log retention. MailerSend is available on web, API and iOS; its mobile app is currently only available for iOS. It states that it is GDPR-compliant and hosts services in a certified ISO 27001 data center in Belgium.

Spec sheet

What it does
MailerSend is a hosted transactional messaging service for sending and tracking email, SMS and WhatsApp messages.Read 15 Oct 2026 · developers.mailersend.com
Product
MailerSend provides transactional email delivery through an email API and SMTP relay.Read 30 Sep 2026 · mailersend.com
Audience
MailerSend describes its Professional plan as intended for agencies and white-label resellers sending at scale, and Starter as for growing startups and small businesses.Read 30 Sep 2026 · mailersend.com
Integrations
Official integrations include WordPress, WooCommerce, Firebase, Symfony, React Email, Supabase, Make, NocoDB, Pipedream, Zapier-related tools and others.Read 15 Oct 2026 · mailersend.com
Compliance
The company states that EU data centers hold ISO 27001 and ISO 20000 certifications and that MailerSend follows EU-U.S. and Swiss-U.S. Data Privacy Frameworks.Read 15 Oct 2026 · mailersend.com
Support
Official plans provide email support, live chat on higher tiers, priority support and onboarding assistance for Professional customers.Read 15 Oct 2026 · mailersend.com
Company
MailerSend says it was launched by the team behind MailerLite and is a United States-registered company.Read 30 Sep 2026 · mailersend.com
API design
The API is RESTful, uses the https://api.mailersend.com/v1/ base URL and authenticates with bearer API tokens.Read 15 Oct 2026 · developers.mailersend.com
API documentation
Developer documentation covers authentication, endpoints, HTTP status codes, validation errors and plan-specific restrictions.Read 15 Oct 2026 · developers.mailersend.com
API limits
The API rejects attachments larger than 25 MB and restricts bulk-email endpoints to Hobby plans and above.Read 15 Oct 2026 · developers.mailersend.com
Company profile
LinkedIn lists MailerSend as privately held, headquartered in New York, New York, with a company size of 2–10 employees.Read 15 Oct 2026 · linkedin.com
Email delivery
It provides both a REST email API and an SMTP relay for transactional sending.Read 15 Oct 2026 · developers.mailersend.com
Email tools
The product includes drag-and-drop, HTML, and rich-text email editors, dynamic templates, and split testing.Read 30 Sep 2026 · mailersend.com
Email verification
Recipient addresses can be verified through the API or application, individually or in bulk.Read 15 Oct 2026 · mailersend.com
Free plan limits
The Free plan allows 500 emails per month and has limits including one template, one domain, one user, and 100 daily API requests.Read 30 Sep 2026 · mailersend.com
Inbound email
Inbound routing parses replies to application events and routes them to an app for further action.Read 30 Sep 2026 · mailersend.com
Inbound routing
Inbound routing receives, parses and forwards incoming email to an application or another address.Read 15 Oct 2026 · mailersend.com
Legal entity
The data-processing agreement identifies MailerSend, Inc. at 228 Park Ave S PMB 54955, New York, New York 10003-1502, United States.Read 15 Oct 2026 · mailersend.com
Limit: account controls
Reviewers report unexpected account suspensions, strict sending limits and pauses that disrupted production workflows.Read 15 Oct 2026 · trustpilot.com
Limit: pricing changes
A Capterra reviewer criticizes the move from a former free Hobby arrangement to a $7 monthly charge and calls the current free plan inadequate.Read 15 Oct 2026 · capterra.com
Limit: retention
A Capterra reviewer says seven-day activity retention on Starter is too short for investigating older delivery problems.Read 15 Oct 2026 · capterra.com
Limit: verification and approval
Some Capterra reviewers complain about difficult domain setup or account rejection without a clear explanation.Read 15 Oct 2026 · capterra.com
Maker relationship
MailerSend says it was launched by the team behind MailerLite after more than ten years of email-delivery experience.Read 15 Oct 2026 · mailersend.com
MCP and CLI
MailerSend provides a hosted MCP server and a command-line interface for sending email and managing accounts.Read 15 Oct 2026 · mailersend.com
Mobile app
MailerSend has an iOS app for managing transactional email activity, performance, and domains; its help page says the app is currently only available for iOS.Read 30 Sep 2026 · mailersend.com
Mobile app limitation
An Apple App Store reviewer reports that the activity tab and message previews failed to show useful data for months.Read 15 Oct 2026 · apps.apple.com
Monitoring
MailerSend offers webhooks, email tracking, real-time activity, analytics, and suppression list management.Read 30 Sep 2026 · mailersend.com
Notable update
MailerSend launched its WhatsApp Business API on September 1, 2026.Read 15 Oct 2026 · mailersend.com
Ownership news
TechCrunch reported on April 28, 2022 that Vercom acquired MailerLite for about $90 million and that MailerSend was one of its subsidiary products.Read 15 Oct 2026 · techcrunch.com
Praise: ease of use
Independent reviews commonly describe setup and the interface as intuitive and easy to use.Read 15 Oct 2026 · capterra.com
Praise: support
Capterra and Trustpilot reviewers repeatedly praise fast, knowledgeable and helpful customer support.Read 15 Oct 2026 · trustpilot.com
Rating on Apple App Store
3.8 out of 5 from 10 ratings.Read 15 Oct 2026 · apps.apple.com
Rating on Capterra
4.4 out of 5 from 62 reviews.Read 15 Oct 2026 · capterra.com
Rating on G2
4.3 out of 5 from 46 reviews (35 five-star, 4 four-star and 7 one-star ratings shown).Read 15 Oct 2026 · g2.com
Rating on Trustpilot
4.2 out of 5 from 230 reviews.Read 15 Oct 2026 · trustpilot.com
Rating on TrustRadius
9 out of 10 from 1 review.Read 15 Oct 2026 · trustradius.com
SDKs
Official libraries are listed for PHP, Laravel, Node.js, Go, Python, Ruby and Java, plus an OpenAPI collection.Read 15 Oct 2026 · developers.mailersend.com
Security and privacy
MailerSend states that it is GDPR-compliant, offers a Data Processing Addendum, and hosts services in a certified ISO 27001 data center in Belgium.Read 30 Sep 2026 · mailersend.com
Security controls
MailerSend states that it uses HTTPS/TLS, AES-256 encryption, two-factor authentication, access controls, monitoring and annual penetration tests.Read 15 Oct 2026 · mailersend.com
Suppressions
MailerSend automatically adds bounces, unsubscribes and spam complaints to suppression lists.Read 15 Oct 2026 · mailersend.com
Team controls
The web application offers role-based access control, two-factor authentication and single sign-on.Read 15 Oct 2026 · mailersend.com
Templates
Users can create templates with drag-and-drop, rich-text or HTML editors and use prebuilt templates.Read 15 Oct 2026 · mailersend.com
Tracking
The platform includes real-time activity views, tracking and analytics reports that can be filtered by domain and tags.Read 15 Oct 2026 · mailersend.com
Transactional focus
The product is designed primarily for transactional email rather than marketing campaigns.Read 15 Oct 2026 · mailersend.com
Trial limits
The 14-day Professional trial includes 500 emails per month, 100 API requests per day, and one day of log retention.Read 30 Sep 2026 · mailersend.com
Webhooks
Webhooks notify applications about email and SMS events for workflow triggers and delivery monitoring.Read 15 Oct 2026 · mailersend.com

Plans and prices

Free Free 500 emails/month · 100 API requests/day · 1 sending domain · 1 webhook · 1 template · 1 user seat + accountant role · 24-hour activity retention Read 15 Oct 2026 · mailersend.com
Hobby $7 a month $7.00/month; $6.30/month with annual billing 5,000 emails/month · 1,000 API requests/day · 1 domain · 5 webhooks · 10 templates · 5 seats · 1 inbound route · 1,000 API requests/day Read 15 Oct 2026 · mailersend.com
Starter $35 a month $35/month; $31.50/month with annual billing 50,000 emails/month · 100 SMS/month · 100,000 API requests/day · 10 domains · 50 webhooks · 250 templates · 5 seats · 50 inbound routes · 50 sender identities Read 15 Oct 2026 · mailersend.com
Professional $110 a month $110/month; $99/month with annual billing 50,000 emails/month · 150 SMS/month · 500,000 API requests/day · 1,000 domains · 5,000 webhooks · 5,000 templates · 1,000 users · 100,000 inbound routes · 30-day activity retention · 7-day API-log retention Read 15 Oct 2026 · mailersend.com
Enterprise Priced on request Custom plan for large enterprises and special requirements Read 15 Oct 2026 · mailersend.com

Every MailerSend plan and price →

Strong points and limits

Strong points

  • API and SMTP relay delivery
  • Includes webhooks and real-time activity
  • Inbound routing parses replies into application events
  • Free plan includes 500 emails per month

Limits

  • Free plan limited to one domain and template
  • Trial includes one day of log retention
  • Mobile app is only available for iOS

Who it suits

MailerSend suits developers and teams integrating transactional email through an API or SMTP relay. Its plan details include a small free allowance and tools aimed at growing startups, small businesses, agencies and white-label resellers.

Verdict

MailerSend combines transactional delivery with editing, monitoring and inbound-routing tools. Review the email and API-request allowances alongside the trial's short log-retention period before choosing a plan.

Where Specifiction places it

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