Mailgun
- Company typePrivate
- Founded2010
- HeadquartersSan Francisco, United States
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
Mailgun firmographics
Firmographics- Name
- Mailgun
- Legal name
- Mailgun
- Website
- https://mailgun.com
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Ownership category
- akta.pro rank
Mailgun industry classification
Industry- Product category
- Transactional Email API
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)
- SIC
- Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Email Marketing Services (Campaigns, Deliverability, Lifecycle) (BPAFAKAB)
- akta.pro secondary industry
- Email Marketing Services (Campaign Strategy, Design, Deliverability) (MPAAAIAA)
Keywords
Where Mailgun is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Mailgun business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations
Revenue model
- Transactional Email Sending (SaaS Subscription + Overage): Mailgun generates revenue primarily through tiered SaaS subscription plans with included email volumes plus overage charges for additional emails. Plans range from free tier (100 emails/day) to enterprise custom pricing. Overage rates decrease at higher tiers ($1.80/1,000 for Basic, $1.30/1,000 for Foundation, $1.10/1,000 for Scale). This is the core revenue stream representing the majority of company revenue.
- Email Validation Services: Separate or add-on pricing for email validation and verification services, ranging from $1.20/100 validations on Basic to $0.80/100 on Scale tier. Provides revenue from list cleaning and real-time address verification.
- Mailgun Optimize (Deliverability Add-on Suite): Separate deliverability services including inbox placement testing, reputation monitoring, blocklist monitoring, and dedicated TAM consulting. Customers who validate email addresses with Mailgun reported 21% lower bounce rates and 65% higher open rates.
- Enterprise Services: Custom enterprise solutions including dedicated infrastructure, Rapid Fire Burst Sending SLA, custom features, and managed deliverability services. Pricing is quote-based and tailored to customer needs.
- Mailgun Inspect (Email QA): Email quality assurance platform for preview testing, code analysis, and accessibility compliance, offered as a separate product or add-on for larger senders.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free tier - 100 emails/day for testing |
| Subscription | Monthly | Basic - 10,000 emails/month starting at $15/mo |
| Subscription | Monthly | Foundation - 50,000 emails/month at $35/mo |
| Subscription | Monthly | Scale - 100,000 emails/month at $90/mo |
| Subscription | Multi-year contract | Enterprise - Custom pricing |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels8 records
Mailgun product offering
Product offeringCore offering
Mailgun provides a cloud-based transactional email delivery platform that combines a RESTful Email API and SMTP relay service for sending, receiving, and tracking emails at scale. The platform is sold as a modular suite including Mailgun Send (core API/SMTP), Mailgun Optimize (deliverability suite), Mailgun Validate (real-time email verification), and Mailgun Inspect (email QA and accessibility testing). It targets developers and enterprises requiring high-volume, reliable email infrastructure with compliance certifications including HIPAA, SOC, GDPR, and ISO 27001.
Product overview
Mailgun is an all-in-one intelligent email delivery platform organized as a modular product suite. The core offering is Mailgun Send, providing RESTful email API and SMTP relay for transactional and marketing email delivery at scale. This integrates with optional add-on modules: Mailgun Optimize (deliverability tools including inbox placement testing, reputation monitoring, and dedicated Technical Account Manager support), Mailgun Validate (real-time and bulk email verification to reduce bounces), and Mailgun Inspect (email QA with preview testing and accessibility compliance). The platform also includes webhook-based event tracking, analytics, and Send Time Optimization capabilities.
Differentiator
Problem solved
Functional benefit
Brands
- Mailgun Send: Email API and SMTP service for sending, receiving, and tracking emails
- Mailgun Optimize
- Mailgun Validate
- Mailgun Inspect
- Sinch Email
Products and services
- Mailgun Send Core email delivery platform providing RESTful Email API and SMTP relay services for sending, receiving, and tracking transactional and marketing emails at scale with high deliverability, batch sending up to 1,000 personalized emails per API call, webhook event tracking, and Send Time Optimization.
- Mailgun Optimize Deliverability add-on suite that combines applications and expert services to maximize inbox placement and improve sender reputation, including inbox placement testing, reputation monitoring, blocklist monitoring, spam trap monitoring, and dedicated Technical Account Manager consulting.
- Mailgun Validate Email validation service that verifies email addresses in real-time via API or bulk list upload, using cached send data from Mailgun's 400B+ emails/year infrastructure to deliver fast and accurate verification, with a 200ms response SLA for 95% of single verification requests.
- Mailgun Inspect Email quality assurance platform offering email previews across 100+ devices and clients (including dark mode), code analysis, email accessibility testing (ADA/EAA compliance), and broken link checking before campaigns launch.
Quantifiable outcome
- 98% average email delivery rate (vs 85% industry average)
- +10 more outcomes
Companies that use Mailgun
Customer profileNamed customers25 records
Segments6 records
Ideal customer profiles4 records
Mailgun technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability4 records
Feature11 records
Mailgun partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered core, minor and strategic.
- SinchcoreSinch acquired Mailgun in 2021 to connect email to the broader communications ecosystem alongside SMS, Messaging, and Voice technologies. Mailgun is now part of Sinch Email division alongside Mailjet and Email on Acid. Sinch has presence in more than 60 countries and handles over 200 billion conversations annually.
- RackspaceminorRackspace acquired Mailgun in 2012 to provide cloud-based email services to their hosting customers. Mailgun later spun out from Rackspace in 2017.
- Google Cloud PlatformcoreMailgun infrastructure is built on Google Cloud Platform (GCP), providing the power and scale to support billions of emails per month. This cloud infrastructure partnership enables global reach and reliability.
- Customer.iostrategicCustomer.io uses Mailgun for transactional email infrastructure. CEO Chris Hexton noted Mailgun makes it easy to build and manage large-scale email marketing applications. Customer.io co-founder John Alison praised Mailgun support during large migration.
- BlueshiftstrategicStrategic partnership with Blueshift leveraging Sinch/Mailgun integration. Expanded into other Sinch product offerings with increased shared customers. Described as one of the most important partnerships for Blueshift.
- Forrester ConsultingminorMailgun partnered with Forrester to conduct Total Economic Impact (TEI) study exploring potential improvements Mailgun could provide composite customers based on interviewed customer data.
- Email on AcidcoreEmail on Acid is part of Sinch Email portfolio, now integrated into Mailgun Inspect product for email QA, previews across 100+ devices/clients, and accessibility testing.
- MailjetcoreMailjet is part of Sinch Email portfolio alongside Mailgun, offering complementary email platform capabilities including Email Editor for template creation.
Scale indicators23 records
Recent moves6 records
Expansion highlights6 records
Mailgun competitors and assessment
Company assessmentDirect peers
- SendGrid (Twilio): SendGrid is the most direct competitor to Mailgun, offering a transactional and marketing email API plus SMTP relay at comparable scale. Both target developers and high-volume senders with similar SLAs, pricing tiers, and deliverability tooling, and Twilio's broader CPaaS positioning mirrors Sinch's ecosystem strategy.
- Mailjet: Mailjet is a sister brand within Sinch's Email portfolio alongside Mailgun, offering transactional and marketing email APIs with a template editor. It targets a similar developer and marketing user base and is the closest functional peer within the same parent company.
- Brevo (formerly Sendinblue): Brevo is a full-stack marketing and transactional email platform competing directly with Mailgun on SMB and mid-market senders. It combines email API with marketing automation, CRM, and SMS, overlapping Mailgun on the transactional side while offering a broader adjacent product surface.
- SparkPost: SparkPost provides a cloud email API and SMTP service for transactional and marketing email at hyperscale, with comparable throughput and deliverability claims. It competes with Mailgun Send and Optimize for high-volume enterprise senders and Martech platforms.
- Postmark: Postmark is a developer-focused transactional email API known for fast delivery and strong inbox placement. It directly overlaps Mailgun Send on the same buyer (developers and SaaS teams) and similar use cases (password resets, notifications, confirmations), competing primarily on reliability and speed.
Emerging players
- Mailtrap: Mailtrap provides email delivery, testing, and inspection infrastructure for developers, with overlap to both Mailgun Send (production sending) and Mailgun Inspect (pre-send QA). It is a smaller but rapidly growing alternative particularly strong with engineering teams.
- Resend: Resend is a venture-backed developer-first transactional email API that has gained rapid traction among modern SaaS startups. It directly overlaps Mailgun Send on the developer persona, competing primarily on DX, modern defaults, and React Email-style tooling.
- SocketLabs: SocketLabs offers a transactional email API, SMTP relay, and deliverability services aimed at mid-market senders. It overlaps Mailgun on core sending and Optimize-style deliverability consulting but at a smaller scale and with a primarily North American customer base.
Broad incumbents
- Amazon Simple Email Service (SES): AWS SES provides transactional email sending at hyperscaler unit economics and is a frequent alternative for cost-sensitive developers. It overlaps Mailgun on core sending functionality but does not offer the same depth of deliverability consulting, Optimize suite, or domain-isolation multi-tenant tooling.
Regional players
- Netcore Cloud (Pepipost / Email API): Netcore Cloud's Pepipost/Email API offers high-volume transactional email with strong presence in India and APAC. It competes with Mailgun on price-sensitive and emerging-market senders but is less established in North America and Europe.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat7 records
Key risks6 records
Key highlights7 records
Customer concentration
Mailgun social profiles
Digital presenceMailgun compliance and trust
Trust signalCompliance6 records
Mailgun financial estimates
Financial estimateRevenue estimate
Valuation estimate
Mailgun leadership team
Management profileNumber of profiles
Profiles1 record
Mailgun subsidiaries and ownership
Company hierarchySubsidiaries2 records
Mailgun funding detail
Funding detailFunding overview
Funding rounds3 records
Investors8 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Mailgun M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Mailgun
What does Mailgun do?
Mailgun provides a cloud-based transactional email delivery platform that combines a RESTful Email API and SMTP relay service for sending, receiving, and tracking emails at scale. The platform is sold as a modular suite including Mailgun Send (core API/SMTP), Mailgun Optimize (deliverability suite), Mailgun Validate (real-time email verification), and Mailgun Inspect (email QA and accessibility testing). It targets developers and enterprises requiring high-volume, reliable email infrastructure with compliance certifications including HIPAA, SOC, GDPR, and ISO 27001.
Is Mailgun a public or private company?
Mailgun is a private company. It is classified as corporate owned and is currently operating.
When was Mailgun founded?
Mailgun was founded in 2010. It employs 101 to 250 people.
Where is Mailgun based?
Mailgun is headquartered in San Francisco, United States, in the North America region.
How does Mailgun make money?
Five revenue lines are on record. Transactional Email Sending (SaaS Subscription + Overage) is the primary driver. The others are email Validation Services, mailgun Optimize (Deliverability Add-on Suite), enterprise Services and mailgun Inspect (Email QA).
Who are Mailgun's main competitors?
Direct peers on record are SendGrid (Twilio), Mailjet, Brevo (formerly Sendinblue), SparkPost and Postmark. Emerging players are Mailtrap, Resend and SocketLabs. Amazon Simple Email Service (SES) is listed as a broad incumbent. Netcore Cloud (Pepipost / Email API) is listed as a regional player.
Does Mailgun have an API?
Yes. Mailgun offers a public RESTful email API that enables businesses to programmatically send, receive, and track emails at scale. The API supports batch sending of up to 1,000 fully personalized emails in a single API call, email routing for parsing incoming messages in UTF-8 JSON format, webhook-based event notifications for real-time tracking (delivery, opens, clicks, bounces, complaints), and SMTP relay as an alternative to API sending. The API also includes Send Time Optimization (STO) for sending campaigns when recipients are most likely to engage. Developer documentation is at documentation.mailgun.com.
What industry is Mailgun in?
Mailgun's product category is Transactional Email API. Its primary akta.pro industry code is BPAFAKAB, Email Marketing Services (Campaigns, Deliverability, Lifecycle), with a secondary code of MPAAAIAA, Email Marketing Services (Campaign Strategy, Design, Deliverability). Its NAICS code is 5182 and its SIC code is 7372.