Best Mailgun Alternatives in 2026
A sourced shortlist of the top Mailgun competitors: SendGrid, Postmark, Resend and Amazon SES. Each is compared with Mailgun on pricing, free plan, features and fit, using dated vendor and independent sources. No rankings and no paid placement.
- Updated 10 Nov 2026Profiles verified 11 Nov 2026
- 4 alternativesEach with a full sourced profile
- Not a rankingFit depends on your priorities
- Not tested by Stack18Editorial summary of documented facts
What are the best alternatives to Mailgun?
The main alternatives to Mailgun covered here are SendGrid, Postmark, Resend and Amazon SES. SendGrid may suit teams wanting one vendor for transactional and marketing email, while Postmark may suit apps where transactional delivery speed matters. None is best for everyone: the right messaging API depends on team size, budget and which Mailgun limitation you are trying to solve.
Teams usually start looking beyond Mailgun for documented reasons: short log retention on cheap plans; scale needed for 30-day logs. Mailgun remains a reasonable fit for developers needing analytics, validation and inbound email, so an alternative is not automatically better, only different.
Below, every option is compared with Mailgun in one table, then described with its strengths, trade-offs and pricing, each taken from its own sourced profile. Anything the sources do not document is marked as unknown.
Why teams look for Mailgun alternatives.
Each reason is a limitation documented on the Mailgun profile, with its source cited there.
Plan gating
Short log retention on cheap plans.
Scope and fit
Scale needed for 30-day logs.
Free plan limits
Free plan is small.
According to its profile, Mailgun may be less suited to: marketing-first teams; SMS needs.
Mailgun vs its top alternatives at a glance.
Mailgun is shown first for reference. Summaries come from each sourced profile; suitability depends on company size, budget, use case and technical requirements.
| Product | Best for | Pricing model | Starting price | Free tier | Channel | Best for |
|---|---|---|---|---|---|---|
 Mailgun (current tool) | Developers needing analytics, validation and inbound email | Volume tiers | Free; $15/mo | Yes (100/day) | Developer control | |
 SendGrid | Teams wanting one vendor for transactional and marketing email | Volume tiers | $19.95/mo | No; 60-day trial | Transactional + marketing | |
 Postmark | Apps where transactional delivery speed matters | Volume tiers | $15/mo | Yes (100/mo) | Deliverability | |
 Resend | Developers building modern apps with React | Volume tiers | Free; $20/mo | Yes (3,000/mo) | React developers | |
 Amazon SES | Engineering teams wanting the lowest per-email cost | Per 1,000 emails | $0.10/1,000 | Credits only | Lowest cost |
Each Mailgun alternative described.
Pricing, strengths and trade-offs are taken from each product's profile, where every point is linked to a dated source.
SendGrid
Twilio · Email API and marketing
SendGrid (Twilio SendGrid) is an email delivery platform with an API and SMTP relay for transactional email plus marketing campaigns.
- Pricing
- Essentials from $19.95/mo; Pro from $89.95/mo (up to 2.5M emails); 60-day trial at 100/day; no permanent free plan.
- Free plan
- No
- Team size
- Small teams, Mid-size teams, Large enterprises
- Scales small to large.
- Transactional and marketing in one vendor.
- No free plan after trial.
- Pro needed for higher volume.
Postmark
Postmark · Deliverability-focused email
Postmark is a transactional email service that separates message streams, publishes delivery stats and focuses on inbox placement.
- Pricing
- Free 100/mo; Basic $15 (10,000); Pro $16.50; Platform $18 a month; overage $1.20-$1.80 per 1,000.
- Free plan
- Yes
- Team size
- Small teams, Mid-size teams
- Delivery focus.
- Published delivery stats.
- Overage costs.
- Bulk API needs support.
Resend
Resend · Developer email API
Resend is an email API for developers with a clean API, React Email templates and modern tooling.
- Pricing
- Free 3,000/mo (100/day); Pro $20 (50,000); Scale $90 (100,000) a month.
- Free plan
- Yes
- Team size
- Small teams, Mid-size teams
- React Email support.
- Clean API.
- 100/day cap on free.
- Costly at high volume.
Amazon SES
Amazon Web Services · Cloud email infrastructure
Amazon Simple Email Service (SES) is AWS's email sending and receiving infrastructure, billed per email with optional managed tiers.
- Pricing
- Pay-as-you-go $0.10 per 1,000; Essentials $0.16 per 1,000 (default for new accounts); Pro $105/mo base; Enterprise $500/mo base; up to $200 AWS credits for new customers.
- Free plan
- No
- Team size
- Small teams, Mid-size teams, Large enterprises
- Lowest per-email cost.
- AWS-native.
- Bare infrastructure.
- No permanent free tier.
Which Mailgun alternative should you choose?
No single alternative is best for everyone. Match the scenario to your own requirements, then test two or three options against a real process.
Consider SendGrid if you are…
- Teams wanting one vendor for transactional and marketing email
- Twilio customers
- High-volume senders
Consider Postmark if you are…
- Apps where transactional delivery speed matters
- SaaS products
- Ecommerce receipts
Consider Resend if you are…
- Developers building modern apps with React
- Startups
- Next.js projects
Consider Amazon SES if you are…
- Engineering teams wanting the lowest per-email cost
- High-volume senders on AWS
- Platform builders
Stay with Mailgun if you are…
- Developers needing analytics, validation and inbound email
- SaaS apps
- Agencies
How to switch from Mailgun.
Moving off Mailgun means updating API keys and SDK calls, re-creating templates, re-verifying sending domains (SPF, DKIM, DMARC) or porting phone numbers and 10DLC registrations, warming new IPs, and updating webhooks for bounces, replies and delivery events. Switch gradually by routing a share of traffic. Send a week of real transactional traffic (or a percentage of it) through each shortlisted provider, then compare delivery, latency, logs and the projected monthly bill.
- Export a sample of your Mailgun data and test an import into the new product.
- List the automations, integrations and permissions you would need to rebuild.
- Compare total cost for your real seat count, including add-ons and onboarding fees.
- Pilot with one team before a full cut-over.
- Check contract terms, renewal dates and notice periods with Mailgun.
General guidance, not specific to any vendor. Confirm migration options with the vendors.
Mailgun alternatives: questions and answers
What is the best alternative to Mailgun?
No single alternative is best for everyone. The alternatives covered here are SendGrid, Postmark, Resend and Amazon SES. SendGrid may suit teams wanting one vendor for transactional and marketing email. Postmark may suit apps where transactional delivery speed matters. Resend may suit developers building modern apps with React. Test two or three against your own process before deciding.
Is there a free alternative to Mailgun?
Yes. Postmark and Resend list a free plan or free tier in their sourced profiles. Free plans usually cap users, records or usage, so check the limits on each profile before relying on one.
Which Mailgun alternative is best for small teams?
SendGrid, Postmark, Resend and Amazon SES are documented for small teams. SendGrid may suit teams wanting one vendor for transactional and marketing email. Postmark may suit apps where transactional delivery speed matters. Resend may suit developers building modern apps with React.
Which Mailgun alternatives suit larger organisations?
SendGrid and Amazon SES are documented for large enterprises as well as smaller teams. Larger rollouts should also check SSO, permissions, audit logs and contract terms on each profile.
Why do teams switch from Mailgun?
The limitations documented on the Mailgun profile are: Short log retention on cheap plans. Scale needed for 30-day logs. Free plan is small. Whether they matter depends on your team and budget.
Who should stay with Mailgun?
Mailgun may still suit developers needing analytics, validation and inbound email; SaaS apps; agencies.
Where can I compare Mailgun with a competitor side by side?
Stack18 has head-to-head comparisons for Mailgun vs Mailtrap and SendGrid vs Mailgun, each with a feature table and pricing summary.
How were these Mailgun alternatives chosen?
They are the products listed as alternatives on the Mailgun profile and other products in the Email & SMS API Software category with overlapping use cases. They are listed in the order shown, not ranked, and no vendor paid for placement. Each profile was verified on 11 Nov 2026.
Where this shortlist comes from.
- The Best Transactional Email Services in 2026 (updated 14 October 2026) Dupple Third-party Accessed 11 Nov 2026
Alternatives are summarised from the linked profiles and their sources: all sources for Mailgun and the main sources for each alternative. Confirm current details with each vendor. Stack18 has not tested these products.
Evaluating Mailgun alternatives?
Compare your shortlist side by side, read the full profiles, or talk to Stack18 if off-the-shelf software is not the answer.
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