Which is cheaper: Customer.io or Mailgun?

Mailgun starts lower at $15/mo, compared to Customer.io starting at $100/mo in the latest snapshot.

Does Customer.io or Mailgun have a free tier?

Mailgun offers a free plan in the latest snapshot, whereas Customer.io only offers paid or trial tiers starting at $100/mo.

Which is better: Customer.io vs Mailgun?

Choosing between Customer.io and Mailgun depends on your team's architecture and workload. Customer.io excels for teams needing streamlined workflows, while Mailgun offers specialized depth in email. Review the side-by-side feature matrix and recent release cadence above to make an informed choice.

How do Customer.io and Mailgun compare for developer and enterprise features?

Customer.io and Mailgun handle enterprise scale differently: compare whether each provider includes SAML SSO, role-based access control (RBAC), SOC 2 compliance, and dedicated support SLAs in their standard tiers or reserves them for custom enterprise quotes.

Do Customer.io and Mailgun support AI agent or MCP integrations?

Both tools support modern API integrations and webhooks. Furthermore, TrackRival provides official Model Context Protocol (MCP) telemetry for Customer.io and Mailgun, allowing AI coding assistants like Claude Desktop and Cursor to query their live pricing and changelogs directly.

How often is this Customer.io vs Mailgun comparison updated?

TrackRival refreshes pricing telemetry daily from verified official sources and appends changelog entries as soon as either Customer.io or Mailgun publishes an update.

Customer.io vs Mailgun

Research & Verification: TrackRival Research Team·Category: email·Updated: Oct 20, 2026

A comprehensive side-by-side comparison of pricing, tier limits, and recent changelog releases for Customer.io and Mailgun.

Quick Verdict: Customer.io vs Mailgun in 2026

Customer.io entry plans start at $100/mo, while Mailgun starts at $15/mo. Choose Customer.io if you need messaging automation for lifecycle and product email, or choose Mailgun for email sending, validation, and deliverability tools.

Customer.io

Messaging automation for lifecycle and product email.

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Category: email
Plans tracked: 3
Entry price: $100/mo
Free plan?: No

See full Customer.io pricing & changelog →

Mailgun

Email sending, validation, and deliverability tools.

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Category: email
Plans tracked: 5
Entry price: $15/mo
Free plan?: Yes

See full Mailgun pricing & changelog →

How do Customer.io and Mailgun pricing plans compare in 2026?

Verified Source Data: Pricing tiers and features are synchronized directly from official vendor endpoints (Customer.io Pricing and Mailgun Pricing) and diff-checked daily by TrackRival telemetry.

Customer.io

Essentials

Customer.io

$100/mo

5k profiles (people + objects)
AI Agent with core execution skills
1 million emails per month
2 object types
Visual workflow builder
+ 1 more

Premium

Customer.io

$1000/mo

Everything in Essentials, plus:
Custom profile volume & pricing
10 object types
Elevated Agent limits + custom skills
Daily Routines (scheduled tasks)
+ 1 more

Enterprise

Customer.io

Custom

Everything in Premium, plus:
Our best pricing on profile & email volume
Priority technical support
Migration support
Dedicated Customer Success Manager
+ 1 more

Mailgun

Free

Mailgun

Free

100 emails per day
Ticket support
RESTful email APIs and SMTP relay
1 custom sending domain
Tracking, analytics, and webhooks
+ 1 more

Basic

Mailgun

$15/mo

10,000 emails/mo included
No daily email limit
Monthly email overage options
RESTful email APIs and SMTP relay
1 custom sending domain
+ 1 more

Foundation

Mailgun

$35/mo

50,000 emails/mo included
1,000 custom sending domains
Email template builder and API
5 days log retention
1 day message retention
+ 1 more

Scale

Mailgun

$90/mo

100,000 emails/mo included
SAML SSO
5,000 email validations
Dedicated IP pools
Send time optimization
+ 1 more

Enterprise services

Mailgun

Custom

Includes everything in the Scale plan
Custom features
Deliverability Services
Rapid Fire Burst Sending SLA