MailerSend

MailerSend provides transactional email delivery through an email API and SMTP relay. It includes 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 help teams manage email activity. Its inbound routing can turn replies into application events and send them to an app for further action. Listed integrations include Zapier, Supabase, Firebase, Slack, Laravel, WooCommerce, WordPress, ChatGPT, and Claude. MailerSend offers web, API, and iOS access; its mobile app is currently available only for iOS. The Free plan allows 500 emails per month, 100 daily API requests, one domain, and one template. Hobby is $5.60 a month, billed $67.20 yearly, while 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 says it is GDPR-compliant and hosts services in a certified ISO 27001 data center in Belgium.

MailerSend combines transactional delivery, email editing, monitoring, and reply routing. Check the plan limits and iOS-only mobile availability against your needs.

MailerSend suits teams that need transactional email tools and integrations with listed services. Its Starter plan is described for growing startups and small businesses, while Professional is intended for agencies and white-label resellers sending at scale.

Overview

MailerSend is a transactional email service built for applications that need dependable API or SMTP delivery alongside serious email-creation and monitoring tools. It best suits startups, agencies, and product teams that must connect sending, reply processing, and operational reporting. The free tier is a useful proving ground, but its 500-email ceiling and single-user setup are not suitable for a busy operation.

Its broader appeal is the combination of outbound delivery and inbound routing: replies can become application events instead of sitting unprocessed in a mailbox. That flexibility comes with plan limits worth checking before adoption, particularly around seats, domains, templates, and daily API requests.

Key features

Delivery works through both an email API and an SMTP relay, giving developers a choice between direct integration and standard mail-server workflows. Drag-and-drop, HTML, and rich-text editors cover different production styles, while dynamic templates support variable content and split testing helps compare versions. This is a practical mix when engineers own delivery but marketers, support staff, or clients also need to create messages.

Webhooks, tracking, real-time activity, analytics, and suppression-list management provide operational visibility rather than leaving teams to infer delivery outcomes. Inbound routing parses replies into application events and routes them to an app for further action, which is valuable for workflows where a response should update a ticket, account, or other product state.

Integrations include Zapier, Supabase, Firebase, Slack, Laravel, WooCommerce, WordPress, ChatGPT, and Claude. A dedicated-IP option is available, although the supplied plan information does not establish which tiers include it. MailerSend states that it is GDPR-compliant, offers a Data Processing Addendum, and hosts services in a certified ISO 27001 data center in Belgium.

Pricing

MailerSend uses a freemium model, with paid service advertised from $7/mo and a 14-day trial. The Free plan costs nothing and allows 500 emails per month, 100 API requests per day, one domain, one template, and one user. It is appropriate for a small proof of concept or low-volume application; the single template and user make it a poor fit for a team managing several message types.

Hobby costs $5.60 a month, billed $67.20 billed yearly. It raises the allowance to 5,000 emails per month and 1,000 daily API requests, with five seats, one domain, and 10 templates. That is a sensible entry point for a small product, but the unchanged one-domain limit and 5,000-message quota can become restrictive as multiple environments or brands appear.

Starter has custom pricing and shows 50,000 emails per month, 10 domains, 250 templates, and 100,000 daily API requests. MailerSend positions it for growing startups and small businesses; email and live chat support are included. Professional also has custom pricing and shows 50,000 emails per month, unlimited users, domains, and templates, plus 500,000 daily API requests. It is aimed at agencies and white-label resellers sending at scale, with priority email support, live chat, and onboarding assistance.

The 14-day Professional trial includes 500 emails per month, 100 API requests per day, and only one day of log retention. Those trial limits are materially narrower than Professional's displayed allowance, so a short evaluation may not represent sustained high-volume operations. The pricing information does not state renewal terms beyond the annual Hobby billing shown.

Platforms

MailerSend is available through its API and web service, with an iOS app for managing transactional email activity, performance, and domains. The help information says the mobile app is currently iOS-only, so Android users should expect to work in the web interface instead.

Who it's for

Choose MailerSend when an application needs transactional delivery, structured monitoring, and a way to turn inbound replies into product events. Hobby fits a small team that can stay within 5,000 monthly messages and one domain. Starter is the more natural scale-up for a growing startup or small business, while Professional is designed for agencies and white-label resellers that need many users, domains, templates, and substantial API headroom.

It is less suitable when Android-native administration is essential, when the free 500-message limit is expected to support a team, or when you need a clearly published price for higher-volume plans before engaging sales.

Pros and cons

Pros

• API and SMTP delivery: supports both integrated application sending and conventional relay workflows.
• Reply-to-event routing: inbound messages can trigger application actions instead of remaining separate from product data.
• Strong operational toolkit: webhooks, tracking, activity, analytics, and suppression management help diagnose delivery behavior.
• Flexible content production: three editor types, dynamic templates, and split testing accommodate mixed technical and editorial teams.
• Broad integration list: connections span automation, databases, frameworks, commerce, collaboration, and AI tools.

Cons

• Restrictive free tier: 500 emails monthly, one user, one domain, and one template limit realistic team use.
• Hobby remains narrow: 5,000 monthly emails and one domain may not cover multi-brand or multi-environment deployments.
• Short, constrained trial: the Professional trial provides only one day of log retention and modest request and email allowances.
• iOS-only mobile app: Android users do not get a native mobile management option.

Alternatives

For a broader comparison of transactional providers, see Transactional Email Software.

turboSMTP is worth considering if Android access matters or if a 200-emails-per-day free allowance and a published €14.95 monthly Basic plan suit your volume better.

Mailchimp is the alternative when audience and campaign management are more central, with web, iOS, and Android apps and a free tier capped at 250 contacts and 500 emails per month.

Twilio Segment is the better direction for customer-data orchestration, offering a free tier with 1,000 visitors per month, 500,000 Reverse ETL records, and two sources.

Nuntly provides another API-and-web option with a 3,000-email monthly free plan, 100 emails per day, one domain, one inbox, and 30-day data retention.

Postmark is an alternative transactional service with a 100-email-per-month free plan that never expires and has no overages.

Twilio SendGrid offers API delivery with a 60-day free trial capped at 100 emails per day and 100 contacts.

EmailSuccess is an option for teams seeking self-hosted or Windows support alongside API and web access.

Maileroo is another API-and-web choice with a free plan covering 3,000 outbound and 1,000 inbound emails per month across two custom domains.

Verdict

MailerSend is a strong choice for application teams that want transactional sending, content tooling, delivery intelligence, and reply routing in one service. Start on Free for a small proof of concept or Hobby for a modest team, then consider Starter or Professional when domains, seats, templates, and API capacity become operational requirements. Look elsewhere if Android administration, a generous permanent free tier, or transparent high-volume pricing is more important than the integrated workflow.