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Catalog entry · InboxRatio Editorial

Mailgun: User reviews, pricing & features

Mailgun is a transactional email API and SMTP relay aimed at developer sending. Like Mailjet, it is owned by Sinch with the brand unchanged; mailgun.com served the transactional email API homepage directly when we verified it in August 2026.

The free plan allows 100 emails per day, and API, SMTP, and webhooks are included on every plan. Basic at $15/month covers only 10,000 emails, so the cheapest tier covering our 50,000-email normalization volume is Foundation at $35/month, with overage billed from $1.30 per 1,000 emails. Pricing checked 19 August 2026.

Measured · August 2026

Our deliverability test

72/100Fair deliverability

Placement

  • Inbox85.2%
  • Tabs (Promotions / Updates)1.5%
  • Spam11%
  • Missing1.7%
  • Bounced0.6%

By mailbox provider

  • Gmail68/100
  • Outlook73/100
  • Yahoo75/100
Deliverability tested: August 2026 · seed-list placement test, formula v0.1-pre-calibration

From our pricing dataset

Pricing at a glance

TierMonthly priceWhat's included
Free$0/mo—
Basic$15/mo10,000 emails/mo
Foundation$35/mo50,000 emails/mo
Scale$90/mo100,000 emails/mo

Pricing checked 19 August 2026 · monthly billing, prices as shown by the vendor.

From our feature dataset

Deliverability capabilities audit

The 17 deliverability capabilities we check every vendor for — authentication help, IP management, list hygiene, and reputation tooling. This audits what Mailgun documents; it is separate from our tested deliverability ranking.

17 of 17 documented capabilities

  • Yes:

    SPF assistance

    'Email authentication and TLS encryption secure email transmission' — sending-domain setup includes SPF/DKIM records

  • Yes:

    DKIM setup

    Domain authentication at sending-domain setup

  • Partial:

    DMARC supportpartial

    Authentication guidance covers SPF/DKIM; DMARC monitoring not stated as a product on fetched pages

  • Yes:

    Dedicated IP

    Dedicated IP access at 50k volume, included at 100k+ (Scale plan includes one)

  • Yes:

    Shared IP pools

    Shared IPs default below dedicated-IP thresholds ('Access at 50k, included at 100K+')

  • Yes:

    IP warming

    Dedicated IP warm-up plan: 'gradually increase your sending volume over a set number of stages' with daily caps per stage

  • Yes:

    Automated warmup

    'a new, automated way to prepare your dedicated IPs'; excess volume 'rollover[s]... to shared IPs or other dedicated IPs tied to your domain'; optional

  • Partial:

    IP pools managementpartial

    'One dedicated IP included + IP pools' on Scale plan

  • Yes:

    Bounce management

    'track bounced or dropped email with timestamps and detailed information'

  • Partial:

    Suppression listspartial

    Bounce/complaint/unsubscribe tracking present; suppression API not verified on fetched pages

  • Partial:

    Complaint managementpartial

    Complaint events tracked via webhooks; auto-suppression policy not stated on fetched pages

  • Yes:

    Feedback loop handling

    'Mailgun registers all of our IPs for these feedback loops' (major mailbox providers other than Gmail); 'we process spam complaints automatically and will stop sending to email addresses after a recipient complains'

  • Partial:

    Reputation monitoringpartial

    'Monitor your most essential email signals... identify and remediate issues' — via Mailgun Optimize add-on

  • Partial:

    Blacklist monitoringpartial

    'Monitor your IPs and domains against all major blocklists and spam traps' — Mailgun Optimize add-on

  • Partial:

    Deliverability analyticspartial

    'inbox placement testing to see where your emails will land across all major mailbox providers' — Optimize add-on

  • Yes:

    Deliverability consulting

    'team of technical deliverability experts... personalized guidance'; managed deliverability services with TAMs

  • Yes:

    Domain authentication guidance

    Authentication setup in onboarding + docs

Items marked — are not documented by the vendor. In this category, silence is itself a signal. How we read vendor claims: methodology.

From our feature dataset

Mailgun feature matrix

What the vendor documents, category by category. ◐ marks tier-gated or limited capabilities; — means the vendor does not document it.

Email5 of 6 documented
  • Partial:

    Marketing campaignspartial

    'send a bulk campaign to your entire mailing list' — bulk/campaign sending exists but no full marketing suite

  • Yes:

    Transactional email

    'Transactional Email Platform'

  • Yes:

    SMTP relay

    'Mailgun's SMTP relays eliminate the need for legacy senders to host their own server'

  • Yes:

    Bulk sending

    Volume plans 10k-100k+ emails/mo with overage

  • Yes:

    Email templates

    'Email Template Builder'

  • Not documented:

    Drag-and-drop editornot documented

Automation6 of 6 documented
  • No:

    Email sequences

    No marketing automation product — API-driven sending platform

  • No:

    Drip campaigns

    Not offered (developer-first sending, no drip builder)

  • Partial:

    Event-based automationpartial

    Event webhooks push data so customers can trigger their own sends; no built-in event automation

  • No:

    Behavioral automation

    Not offered

  • No:

    Workflow builder

    Not offered

  • Partial:

    Conditional logicpartial

    Template variables/logic in Email Template Builder; no automation branching

AI6 of 6 documented
  • No:

    AI email generation

    No AI content features stated on product pages

  • No:

    AI subject lines

    Not offered

  • Partial:

    AI content optimizationpartial

    'Send Time Optimization: Send email campaigns when recipients are most likely to engage'

  • No:

    AI segmentation

    Not offered

  • No:

    AI campaign recommendations

    Not offered

  • Partial:

    AI agent / assistantpartial

    Official MCP server (Mailgun MCP Server (@mailgun/mcp-server)) lets external AI assistants act on the account; no native in-product agent documented

Personalization3 of 4 documented
  • Not documented:

    Segmentationnot documented

    Mailing-list targeting; marketing-style segmentation not stated

  • Partial:

    Dynamic contentpartial

    Templates with variables via Template Builder/API

  • Partial:

    Personalization variablespartial

    Template variable substitution

  • No:

    Behavioral targeting

    Not offered

Analytics4 of 4 documented
  • Yes:

    Opens & clicks

    'Analyze key metrics like open rates, click-through rates'

  • No:

    Conversion tracking

    Not offered — no revenue attribution

  • Partial:

    Campaign reportingpartial

    'Email Analytics' + 'Email Logs' (5-day retention on Foundation)

  • Partial:

    Deliverability analyticspartial

    Inbox placement testing via Mailgun Optimize add-on product

Developer features5 of 5 documented
  • Yes:

    API

    'RESTful email API... programmatically send, receive, and track emails' on all plans incl Free

  • Yes:

    SMTP API

    SMTP relay on all plans

  • Yes:

    Webhooks

    'Email Event Webhooks: Push email campaign data to other apps' — all plans incl Free

  • Yes:

    SDKs / client libraries

    'Our comprehensive documentation and SDKs make it easy to get started'

  • Yes:

    Public API docs

    Public documentation portal

Marketing platform7 of 7 documented
  • No:

    CRM

    Not offered — transactional email service

  • No:

    Signup forms

    Not offered

  • No:

    Popups

    Not offered

  • No:

    Landing pages

    Not offered

  • No:

    Chatbots

    Not offered

  • No:

    SMS

    Not offered (email only; Sinch family has separate SMS products)

  • No:

    Other channels

    Email only

E-commerce5 of 5 documented
  • No:

    Store integrations

    Not offered — no store apps

  • No:

    Cart recovery

    Not offered

  • No:

    E-commerce automation

    Not offered

  • No:

    Purchase tracking

    Not offered

  • No:

    Product recommendations

    Not offered

Features checked 10 September 2026 · from vendor documentation and official feature pages.

AI & agent readiness · checked 2026-09-10

Mailgun and AI agents

67/100AI-ready

Official MCP server

AI agents and assistants can work with Mailgun directly through Mailgun MCP Server (@mailgun/mcp-server): send email, manage domains, templates, suppressions, webhooks, routes and mailing lists; query delivery analytics

Scored 0–100 from public evidence: an official MCP server weighs most (40, +5 when hosted), then official agent skills, AI assistant apps, AI-friendly docs and built-in AI features. "Not found" means we couldn't locate it on Mailgun's public pages or the official MCP registry, not that it can't exist. This is context, never part of the Deliverability Score.

Captured from the vendor website

Mailgun in screenshots

Mailgun website: homepage hero section

Mailgun homepage, August 2026

Source: vendor website · 21 August 2026

Mailgun website: product/features section

Homepage "Send and deliver emails with assurance" section with analytics UI

Source: vendor website · 21 August 2026

Independent review platforms — shown as context; never part of our measured Deliverability Score

What users say

Trustpilot

4.1/5

1,522 reviews

Checked 21 August 2026

G2

4.2/5

321 reviews

Checked 22 August 2026

Capterra

4.3/5

197 reviews

Checked 21 August 2026

Weighted average 4.2/5 across 2,040 reviews.Substantial review base

Trustpilot counts for half of the average: it is an open platform where businesses can't remove negative reviews. G2 and Capterra share the other half, and a platform with fewer than 100 reviews counts proportionally less.

Same primary category, from our catalog

Alternatives to Mailgun

Brevo

$$

Email marketing plus transactional email and SMTP relay on one platform; the European demand anchor in our catalog.

View profile →

SendGrid

$$

Transactional email API and SMTP service operated by Twilio, with a separate Marketing Campaigns product; the transactional demand anchor.

View profile →

Mailjet

$$

Email marketing with transactional API and SMTP sending, owned by Sinch; most of its measured demand sits in Europe.

View profile →

Selected by catalog rule — same primary category, same depth tier first, then catalog demand order. Never hand-picked.

Generated from our datasets — every value verified and dated

Frequently asked questions

What is Mailgun?

Mailgun is a transactional email service in the InboxRatio catalog, also covering smtp provider and developer email infrastructure. Its regional focus is Global.

How much does Mailgun cost?

Paid Mailgun plans start at $15/mo (Basic tier), prices as shown by the vendor, last checked 19 August 2026.

Does Mailgun document its deliverability capabilities?

Mailgun documents 17 of the 17 deliverability capabilities we audit every vendor for (authentication help, IP management, list hygiene, reputation tooling). This audits what the vendor documents — it is separate from our measured Deliverability Score, and undocumented items are themselves a signal. How we read vendor claims.

What do users say about Mailgun?

Across 2,040 reviews on Trustpilot, G2 and Capterra, Mailgun averages 4.2/5, with Trustpilot counting for half of the average. User ratings are shown as context only — never part of our measured Deliverability Score.

Has Mailgun's deliverability been tested by InboxRatio?

Yes — Mailgun was measured in our seed-list deliverability test on 31 August 2026. Results publish to the email deliverability ranking; the full protocol is documented in our methodology. How we test.

What are the main Mailgun alternatives?

From our catalog, the closest alternatives are Brevo, SendGrid and Mailjet — services sharing Mailgun's primary category (transactional email), selected by a neutral catalog rule, never hand-picked.