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Transactional Email Services · Reviewed 14 Oct 2026

Mailgun

Email delivery platform for developers and businesses.

from $15 · free tier · mailgun.com ↗

Paid against free › Transactional Email Services › Mailgun

Mailgun at a glance

SEO analysis

Collected Oct 14, 2026

mailgun.com: an estimated 686,293 total monthly visits and about 55,360 monthly organic visits across 4,107 ranking keywords. Scout crawled 15 pages and measured a technical health score of 93/100.

686.3KEstimated total trafficModeled monthly visits4.1KRanking keywordsPublic search sample93/100Technical health15 pages checked17.2KReferring domainsLive backlink summary

Overview

01

Summary

The useful answer before the supporting detail.

Mailgun is an all-in-one email delivery platform for sending, receiving, and tracking email at scale S1. It is used by developers and businesses to integrate transactional and marketing email into their applications via API or SMTP S13. The platform provides tools for deliverability, validation, and QA to help ensure emails reach the inbox S39 S45 S23.

02

Product identity and positioning

Name, category, positioning, audience, and first-party claims.

  • Identity: Mailgun is an email delivery platform and API service S1.
  • Core purpose: Solves the problem of reliably sending and tracking email at scale S1 S13.
  • Intended users: Developers and businesses building email programs S1 S13.
  • Product scope: A platform with sending, validation, QA, and template tools S13 S45 S23 S54.
  • Positioning: Positioned as the all-in-one, intelligent email delivery platform S1.
  • Claimed distinction: Claims industry-leading reliability, compliance, and speed S8 S138.
03

Use cases and audiences

Who the product serves and the jobs it is designed to handle.

AudiencePractical use case
DevelopersIntegrate transactional email into applications via API or SMTP S13.
Marketing teamsSend bulk email campaigns and marketing blasts S13.
BusinessesMaintain email list hygiene and reduce bounces with validation S45.
Large sendersImprove deliverability with dedicated IPs and expert support S30 S1.

Features

09

Features and capabilities

Core functions and evidence-backed product capabilities.

CapabilityWhat it does
Email sending APISend transactional and marketing emails programmatically via RESTful API or SMTP relay S13.
Inbound routingParse and route incoming email streams in UTF-8 JSON for integration into systems S13.
Email analyticsTrack opens, clicks, bounces, and unsubscribes with detailed logs S13.
Email validationValidate email lists in real-time to reduce bounces and protect sender reputation S45.
Email QA (Inspect)Test email designs across 100+ clients and devices, with accessibility checks S23.
Template builderCreate and manage HTML email templates with drag-and-drop or API S54.
Authentication protocolsSupport SPF, DKIM, and DMARC to improve deliverability and prevent spoofing S30.
10

Integrations and ecosystem

Connected products, exports, APIs, and workflow compatibility.

Integration or interfaceTypeWhat it enables
RESTful APIAPISend, receive, and track emails programmatically S13.
SMTP relayIntegrationSend email via standard SMTP protocol S30.
WebhooksWebhookStream bounce and delivery data to your systems S30.
Client librariesSDKUse published libraries for Python, Ruby, Java, and C S30.
ZapierIntegrationConnect to 7,000+ apps for automation S30.
HubSpotIntegrationIntegrate via Zapier for CRM and marketing S30.
Templates APIAPIStore, version, and send templates programmatically S54.

Pricing

11

Pricing and plans

Published plans, free access, trials, credits, and pricing limitations.

Plan or offerVerified price and billingIncludedLimits
Free$0/month S30Send up to 100 emails/day S30100 emails/day S30
FoundationStarting at $15/month S30Dedicated IPs S30Not established
ScaleNot establishedIP pools S30Not established
EnterpriseContact sales S30Not establishedFor sending more than 250MM emails/month S30

image

Competition

12

Alternative tools

Named from this report, then each website opened and checked before it is shown.

SendGridSendGrid Email API and Email Marketing Campaigns | TwilioOffers similar transactional and marketing email APIs with robust analytics, differing through its extensive free tier and user-friendly interface for solo builders.PostmarkPostmark: Fast, Reliable Email Delivery Service | SMTP | APIProvides reliable transactional email delivery like Mailgun, but focuses heavily on lightning-fast delivery speeds and simpler, usage-based pricing.ResendResend · Email for developersA modern developer-first email platform offering APIs for transactional emails, differing with its sleek developer experience and React-based template support.Amazon SESCloud Computing Services - Amazon Web Services (AWS)Delivers transactional emails via API and SMTP just like Mailgun, but operates on AWS with significantly lower pay-as-you-go pricing for high-volume senders.

4 verified

13

Competitive landscape

Domains competing for the same organic search demand.

Sampled competitors

CompetitorFirst-page appearancesSampled queriesAverage positionQueries observed
mailtrap.io112email deliverability services
cloudflare.com112465 port
reddit.com113email deliverability services
twilio.com113465 port
emailtooltester.com114email deliverability services
mailersend.com114465 port
mailjet.com115email deliverability services
jscape.com115465 port
inboxarmy.com116email deliverability services
smtp.com116465 port

Website intelligence — Collected evidence

Customers, testimonials, and first-party review claims

No supporting public-page evidence was collected for this category.

Independent review sources discovered

No links to supported independent review platforms were discovered on the collected pages.

15

AI visibility

Measured ChatGPT and Google AI mentions with cited sources.

AI-assistant referral traffic

  • Estimated current generative-AI referral share: 1.0%
MonthSource
—All AI assistants
—All AI assistants

Website intelligence — Collected evidence

Site-stated AI capabilities

Page typeEvidenceSource
integrationsIs email still worth it? We surveyed 1,200+ senders and analyzed 400B emails to reveal ROI, relevance, and AI's influence. Unlock the full Email Impact report.https://www.mailgun.com/

These are first-party product claims, not independent measurements of AI-search visibility.

16

Marketing opportunities

Actions calculated directly from the collected evidence.

OpportunityRecommended actionEvidence
Competitor gapReview the sampled queries where mailtrap.io appears.1 first-page appearances across email deliverability services

Website intelligence — Collected evidence

Website evidence gaps

  • customers: no usable public page was collected; verify whether the site publishes this evidence.
  • reviews: no usable public page was collected; verify whether the site publishes this evidence.
  • changes: no usable public page was collected; verify whether the site publishes this evidence.
  • identity: no usable public page was collected; verify whether the site publishes this evidence.
  • technical: no usable public page was collected; verify whether the site publishes this evidence.

Trust and proof

17

Customers, proof, and reviews

Published proof, customer signals, and review evidence.

Independent reviews

PlatformPageHow it was foundNote
TrustpilotMailgun Reviews / Read Customer Service Reviews of mailgun.comGrounded web searchReviewers had a great experience with this company. Customers consistently praise the staff for their helpfulness and positive attitude, making interactions pleasant and productive. Many people highlight the exceptional customer service, appreciating the personalized and understanding approach. The service provided is often described as excellent, with consumers noting the efficiency and ease of their overall experience, including a user-friendly dashboard and onboarding process. However, some p
APIbenchmarksMailgun: review, pricing & ABI score · APIbenchmarksGrounded web searchReviewers across G2, Capterra, and Trustpilot repeatedly flag that pricing escalates sharply with volume and that overage rates have risen over time (the legacy pay-as-you-go Flex plan doubled from $1.00 to $2.00 per 1,000 messages in December 2025 and is
ProspeoMailgun Pricing, Reviews, Pros & Cons (2026)Grounded web searchHere's the thing: Mailgun's overage model can produce genuinely shocking bills. One Reddit user described 10,000,000 validations hitting their account on Christmas 2024, then 6,000,000 more in early 2025, causing major overage fees. They said it wasn't triggered by their own systems. After ending their contract in June 2025, they reported receiving an invoice over $30,000 in July 2025. ... Let's be honest: Mailgun's biggest risk isn't pricing. It's getting your account disabled without warning w
RevOps ToolsMailgun Review 2026 — Email Deliverability / RevOps ToolsGrounded web searchMailgun Review 202 ... — Email Deliverability / RevOps Tools ... Ratings: G2: 4.3/5 (700+ reviews) What buyers praise: - Excellent developer documentation - Reliable transactional delivery - Good email validation API
Subscribed.fyiMailgun Reviews 2026: Details, Pricing, & Features / Subscribed.fyiGrounded web searchLearn what people say about Mailgun 4.3 ★ ★ ★ ★ ★ 4 Reviews 78% Subscribed Score ... Reviews from G2, Capterra, Trustpilot 4.2 4.2 (294 Reviews) G2 Review 4.1 (163 Reviews) Capterra Review
Emails for SaaSMailgun: transactional email API review · Emails for SaaSGrounded web searchMailgun has long positioned itself as the developer-friendly alternative to SendGrid. The API is well-documented, SMTP is first-class, and routing rules are powerful. Still a strong pick for technical teams that want SMTP relay plus rich routing.
toolradar.comMailgun Reviews, Pricing & Alternatives (2026) / ToolradarGrounded web searchMailgun holds an aggregate rating of 4.1 out of 5 from 1,850 reviews across G2 and Trustpilot, last checked September 17, 2026. G2 321 reviews 4.2/5 Trustpilot 1,529 reviews ... Across 1,850 verified user reviews on Trustpilot, G2
emailsoftwareinsights.comMailgun Review 2025: Is This Email Service Worth Your Time?Grounded web searchg2: ... of Mailgun ... on to get their emails ... G2: ... ### G2 Reviews Summary Technical users consistently ... . Several reviewers ... ### Trustpilot Reviews Summary
mailtrap.ioI’ve Tested and Compared SendGrid vs Mailgun: Here’s What I FoundGrounded web searchlike G2 for example have mixed reviews, with ... of them being 4+. Here ... G2: 4.3 🌟 Capterra: 4.2 🌟 Contrary to SendGrid, I’ve seen mostly positive Mailgun reviews on Twitter. Here’s what people have to say about

Customer proof

No named customers, testimonials, or customer case studies were found.

Independent mentions

External links were grounded in one live web search. Search snippets are leads, not independently scraped page content; rejected links remain available in Review evidence.

18

Company, security, and trust

Ownership, policies, security signals, and public trust evidence.

SignalFindingSource
Company and ownershipMailgun was founded in 2010 as a response to the lack of developer-friendly, API-based email services. The idea was to make it dead simple for developers to integrate email capabilities into your app. Since then, we’ve ssource
Contact and supportInterested in adding our email testing tools to your platform? Contact us today to discuss how Mailgun can help streamline your entire email lifecycle.source
Legal and privacyUpon signup, you will only be billed the prorated amount of the selected plan for the current month. After that, your monthly plan cost and any extra emails and validations you use will be billed at the start of each monsource
Security and complianceISO 27001 certifiedsource
ReliabilityGuaranteed Uptime SLAsource
Domain registered2003-12-20—
Domain expires2033-12-20—

Every trust signal above is backed by a collected page or a registration record.

19

Documentation and product updates

Help resources, product guidance, and visible changes over time.

Resource or updateTypeWhat is availableDate or freshness
About - MailgunProduct updateProduct update is publicly available. (source)Not dated

Not found in the collected public sources: public roadmap, changelog or release notes, status page, separate help center or knowledge base.

Technical

20

Technical and delivery signals

Delivery model, platforms, API, data ownership, reliability claims and release activity.

SignalFindingSource
Delivery model (cloud, self-hosted, desktop, browser extension)Cloud-based email delivery platform S170.S170
Platforms and appsWeb-based platform; no native mobile or desktop apps mentioned S1.S1
API and extensibility (API, SDK, webhooks, MCP, plugins)RESTful API, SMTP, webhooks, and client libraries for multiple languages S13 S30.S13 S30
Data ownership and exportNot published on the collected pages.—
Performance and reliability claims99.99% server uptime and 200ms response for verification API S30 S13.S30 S13
Release activityNot published on the collected pages.—
21

Measured infrastructure

Domain, certificate, and hosting signals, measured directly.

SignalFinding
Domain registered2003-12-20 — NameCheap, Inc.
Domain expires2033-12-20
First archived2002-05-26 — web archive
TLS certificateLet's Encrypt, valid, expires 2026-12-21
Security headersHSTS, CSP, X-Content-Type-Options, X-Frame-Options, Referrer-Policy
Server headercloudflare
Mail handled bymailgun-com.mail.protection.outlook.com
Nameserversns-445.awsdns-55.com, ns-907.awsdns-49.net

Not measurable: rdap: exceeded the overall budget; wayback: exceeded the overall budget; tls: exceeded the overall budget; dns: exceeded the overall budget; headers: exceeded the overall budget. A gap here means the lookup was unavailable, not that the finding is negative.

22

Technical site audit

A bounded multi-page crawl with page-level issues and URLs.

Scout — Bounded technical crawl

  • Pages crawled: 15 of 15 maximum
  • Technical health: 93/100
  • Critical issues: 0
  • Warnings: 20
  • Notices: 0

Issues

SeverityIssueValueAffected URL
warningTitle length should be reviewed105https://www.mailgun.com/
warningTitle length should be reviewed105https://www.mailgun.com/
warningMissing meta description—https://www.mailgun.com/about/
warningTitle length should be reviewed95https://www.mailgun.com/industries/martech/
warningTitle length should be reviewed66https://www.mailgun.com/about/jobs/
warningTitle length should be reviewed71https://www.mailgun.com/blog/
warningMissing meta description—https://www.mailgun.com/blog/
warningTitle length should be reviewed66https://www.mailgun.com/contact/support/
warningTitle length should be reviewed107https://www.mailgun.com/fr/
warningTitle length should be reviewed108https://www.mailgun.com/de/
warningTitle length should be reviewed118https://www.mailgun.com/es/
warningTitle length should be reviewed117https://www.mailgun.com/pt/
warningTitle length should be reviewed102https://www.mailgun.com/pricing/
warningTitle length should be reviewed90https://www.mailgun.com/products/send/
warningTitle length should be reviewed128https://www.mailgun.com/products/optimize/
warningTitle length should be reviewed114https://www.mailgun.com/products/validate/
warningDuplicate title in audit sample2https://www.mailgun.com/
warningDuplicate title in audit sample2https://www.mailgun.com/
warningDuplicate meta description in audit sample2https://www.mailgun.com/
warningDuplicate meta description in audit sample2https://www.mailgun.com/

Crawled pages

StatusTitleH1sWordsResponseURL
200Transactional Email API Service For Developers - Transactional Email API Service For Developers \Mailgun1106747 ms
200Transactional Email API Service For Developers - Transactional Email API Service For Developers \Mailgun1106731 ms
200About - Mailgun11011166 mshttps://www.mailgun.com/about/
200Sinch Email for Marketing Technology - Transactional Email API Service For Developers \Mailgun1114858 ms
200Careers - Transactional Email API Service For Developers \Mailgun148337 ms
200Blog Archive - Transactional Email API Service For Developers \Mailgun1709181 ms
200Support - Transactional Email API Service For Developers \Mailgun153431 ms
200Email API transactionnelle pour les développeurs - Transactional Email API Service For Developers \Mailgun1119349 ms
200Der Transaktions-E-Mail-API-Dienst für Entwickler - Transactional Email API Service For Developers \Mailgun199538 ms
200Servicio de API de email transaccional para desarrolladores - Transactional Email API Service For Developers \Mailgun1120354 ms
200Serviço de API de e-mail transacional para desenvolvedores - Transactional Email API Service For Developers \Mailgun1122558 ms
200Flexible Email Delivery & API Pricing Plans - Transactional Email API Service For Developers \Mailgun1212041 ms
200Email Sending Service Solutions - Transactional Email API Service For Developers \Mailgun1161635 ms
200Optimize Email Deliverability & Reach More Inboxes \Mailgun Optimize - Transactional Email API Service For Developers \Mailgun11266
200Email Validation Tool & List Checker \Mailgun Validate - Transactional Email API Service For Developers \Mailgun13451

This is a bounded Scout crawl. Core Web Vitals and Lighthouse scores are not claimed unless a dedicated performance audit is connected.

23

Search Console and Analytics

First-party search and behavioral data connection state.

Modeled acquisition channels

ChannelEstimated share
direct51.9%
search29.0%
search organic16.7%
search paid12.3%
social1.8%
social organic1.7%
social paid0.2%
referrals2.5%
paid referrals0.9%
mail12.8%
gen ai1.0%
affiliate0.0%
other0.0%

First-party connections

IntegrationStatusData available after connection
Google Search ConsoleNot connectedClicks, impressions, CTR, average position, queries, pages, countries, and devices
Google AnalyticsNot connectedOrganic sessions, engagement, landing pages, conversions, geography, and devices

No first-party Search Console or Analytics numbers are shown until the site owner authorizes the corresponding Google account. Scout traffic model values above are modeled estimates, not private analytics totals.

Limits and method

24

Limitations and open questions

Known constraints and missing evidence from the collected pages.

The collected pages do not mention specific competitors. Evidence gaps include lack of detailed pricing for all plans, no named customer case studies, and no explicit data export or retention policies. Open questions remain about the exact features of higher-tier plans and the scope of the Inspect platform's integration with third-party tools.

25

Sources, method, and limitations

Evidence inventory, collection method, provider use, and constraints.

This report is based on 15 collected pages from mailgun.com, including product, feature, and about pages. The evidence catalog includes 180 entries from these pages. External proof search was performed but no third-party reviews or ratings were collected. Limitations include the absence of pricing details for all plans and lack of independent customer verification.

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