Mailgun

New

Transactional Email API Service For Developers

Email Marketing201–500 employeesFounded 2010

#36 of 55 in Email Marketing150,000 customers (per mailgun.com)0% positive in AI answers

Track this brand Visit website Compare alternatives

Visibility score

0.9%

New vs last week

Weekly run · Nov 2

Data collected Nov 2, 2026·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run Nov 9, 2026

Mailgun ranks #36 of 55 in Email Marketing with an AI visibility score of 0.9 (SlateIndex, Nov 2, 2026).
Mailgun is most visible on ChatGPT (2.6) and least on Perplexity (0).
AI engines name Mailgun in 1 of the 30 Email Marketing buyer prompts SlateIndex tracks.
google.com is the source AI engines cite most in answers about Mailgun, with 2 citations.

About

Company details for Mailgun

Mailgun is an email delivery platform that lets applications send, receive and track email through a RESTful API and SMTP relays. Its products cover sending (Mailgun Send), deliverability testing and monitoring with email validation (Mailgun Optimize), and pre-send previews and quality assurance (Mailgun Inspect). Mailgun was founded in 2010 and has been owned by Sinch since 2021. It ranks #36 of 55 in Email Marketing on SlateIndex and has a visibility score of 0.9 in the latest weekly run.

It has raised about $51M. Its differentiator: aPI-first email delivery built for developers, backed by SLAs such as 99% attempted delivery of up to 15 million messages within five minutes.

Website: mailgun.com
Categories: Email Marketing
Company size: 201–500 employees
Founded: 2010
Company type: Division of Sinch
Funding: Growth investment (Thoma Bravo) · $51M raised
Customers: 150,000 · per mailgun.com
Pricing: Free; paid from $15 / mo · usage-based
Free trial: Free plan available
Deployment: Cloud, hosted in US and EU regions
Platforms: Go, Node.js, PHP, Java, Ruby, Python
Compliance: SOC 2 Type II, ISO/IEC 27001, ISO 27701, GDPR compliant, HIPAA compliant, PCI-compliant SAQ-A merchant
Support: Knowledge Center, Documentation, Ticket support, Chat support on higher plans, Phone support on Scale plan, Dedicated Technical Account Manager on Optimize contracts

LinkedIn · linkedin.com/company/mailgun-inc/X (Twitter) · twitter.com/Mail_Gun/Facebook · facebook.com/mailgun/

Read from mailgun.com, capterra.com, linkedin.com, app.dealroom.co, crunchbase.com · refreshed Nov 2, 2026.

AI visibility

Latest weekly run · Nov 2 · next run Nov 9

Visibility score

0.9%

across Email Marketing answers, weighted by position

ChatGPT2.6%

AI Mode0%

Perplexity0%

Change

New

vs last week’s run

Category rank

#36 of 55

in Email Marketing

Mentions

in this week’s run

Share of voice

0.2%

of AI mentions in Email Marketing

Visibility score trend

Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.

Now0.9%

30-day change—

High · low0.9% · 0.9%

Rank#36

Changes appear after the second weekly run in Email Marketing. Mailchimp leads the category at 45.4%.

Media

Website and product screenshots for Mailgun

All media

Home page

Pricing page

AI mentions & citations

Recent answers that name Mailgun

All prompts

How do companies send and measure email campaigns without a dedicated tool?

Use services such as Amazon SES, SendGrid, or Mailgun to send larger volumes programmatically.

ChatGPT · run of Nov 2

Products & features

What Mailgun sells

Mailgun Send

Email sending service with RESTful API, SMTP relay, inbound routing and analytics.

Mailgun Optimize

Email deliverability suite with validation, inbox placement testing and reputation monitoring.

Mailgun Inspect

Email quality assurance suite with previews, code analysis and accessibility checks.

Deliverability Services

Managed deliverability expertise with a dedicated Technical Account Manager.

Strengths engines cite

recommended for sending larger volumes programmatically

Target market & buyers

Businesses and development teams sending transactional and marketing email at scale

Notable customers include Lyft, Microsoft, Etsy, Dribbble.

Funding & recent developments

Funding

Round	Year	Amount
Seed (Y Combinator)	2011	$0M
Seed	2011	$1M
Series B (led by Turn/River Capital)	2017	$50M
Growth investment (Thoma Bravo)	2019	—

Latest known round	Total raised
Growth investment (Thoma Bravo)	$51M

Recent developments

Oct 2026ProductAI Insights in Mailgun Optimize leaves beta
AI Insights in Mailgun Optimize left beta and a customizable dashboard launched in Mailgun Send.
Sep 2026PartnershipMailgun Inspect integrated with Salesforce AgentExchange
Mailgun Inspect became available through Salesforce's AgentExchange.
Apr 2026CompanyEmail Impact Report 2026 released
Sinch Mailgun released its Email Impact Report 2026.
Apr 2026ProductEmail on Acid customers move to Mailgun Inspect
Email on Acid customers began moving to Mailgun Inspect, starting June 2026.

Competitive landscape

How Mailgun compares with its top three alternatives

All alternatives

Mailgun most often appears alongside Mailchimp, Sender, Twilio SendGrid in AI answers.

vsMailgun vs Mailchimp0.9% vs 45.4% visibility · Mailchimp leadsFull comparison vsMailgun vs Sender0.9% vs 13.9% visibility · Sender leadsFull comparison vsMailgun vs Twilio SendGrid0.9% vs 4.9% visibility · Twilio SendGrid leadsFull comparison

Brand	Visibility	Share of voice	vs last week	Starting price
Mailgun	0.9%	0.2%	New	Free plan
Mailchimp	45.4%	9.6%	New	Free plan
Sender	13.9%	3.7%	New	Free plan
Twilio SendGrid	4.9%	1.6%	New	Pricing not available
Amazon SES	2.6%	0.6%	New	Pricing not available