Last Updated: May 2026
The global email API platform market was valued at $3.1 billion in 2024 and is projected to reach $8.2 billion by 2033, according to Dataintelo's 2025 industry report. That growth tells you something important: the choice of transactional email vendor is no longer a low-stakes decision. Pricing, deliverability, log retention, and dedicated IP costs vary by 5-10x across providers.
Mailgun alternatives have become a search-volume staple in 2026 for one specific reason. After Sinch's acquisition of Pathwire (the parent of Mailgun), pricing on the Flex plan moved from $1 per 1,000 emails to $2 per 1,000 effective December 2025, dedicated IPs sit at $59 per month per IP, and log retention on the Foundation plan caps at 5 days. Teams that started on Mailgun for its pay-as-you-go simplicity are evaluating switches at a higher rate than at any point in the last three years.
This guide compares 9 Mailgun alternatives. Each has its own deliverability profile, pricing model, and developer experience. Pricing was verified in May 2026 from each vendor's public pricing page.
Why Teams Are Leaving Mailgun in 2026
Mailgun is still a capable email API. Most teams that switch do so for one of four reasons.
- Pricing has shifted. The Flex (pay-as-you-go) plan doubled to $2 per 1,000 emails in December 2025. Dedicated IPs are $59 per IP per month on the current Mailgun pricing page, compared with $24.95 on Amazon SES.
- Log retention is short on entry tiers. Foundation retains logs for 5 days. Postmark retains 45 days as the default. For teams debugging delivery issues across a billing cycle, this matters.
- Email validation is metered. Foundation charges $1.20 per 100 validations, which can introduce surprise line items on volume-heavy accounts.
- Support response complaints. Multiple G2 and Trustpilot reviews flag long response windows on lower tiers. The Trustpilot page shows mixed sentiment around support speed.
If none of these is a real constraint for you, staying on Mailgun is a defensible choice. The list below is for teams where one or more of them already hurts.
How We Evaluated These Alternatives
Every tool below was assessed on six dimensions:
- Pricing transparency. Published per-1,000 or per-tier pricing, no hidden floors.
- Free tier or trial. What you get before you pay.
- Deliverability reputation. Public deliverability data, IP warmup tooling, dedicated IP cost.
- Developer experience. SDK quality, docs, webhook event model, idempotency.
- Log retention and observability. How long sends are queryable.
- Support and G2 sentiment. Verified review scores and recent reviewer themes.
Which Mailgun Alternative Fits Your Team?
Pricing verified May 2026 from each vendor's public pricing page.
1. Postmark
Postmark is a transactional-email specialist that built its reputation on fast delivery and clean separation between transactional and marketing streams. It's the go-to Mailgun alternative for teams whose number one priority is inbox placement on receipts, password resets, and notifications.
Key features:
- Message Streams that isolate transactional from broadcast traffic
- 45-day log retention as default (extendable to 365 days)
- Inbound email parsing with webhooks
- Template versioning with draft and live states
- Bounce and spam webhooks with detailed event payloads
Pricing: Free tier 100 emails/month. Paid plans start at $15/month for 10,000 emails. 100,000 emails costs around $126/month. Pricing page.
G2 rating: 4.6 stars (G2 profile, listed under ActiveCampaign Postmark).
Pros: Strong transactional deliverability, clean separation of streams, transparent dashboards.
Cons: Per-1,000 cost is higher than Mailgun at low volume, marketing automation features are minimal, no in-app or push channels.
Best for: Teams whose top priority is transactional inbox placement and want a clean break from marketing sends.
2. Amazon SES
Amazon SES is AWS's bare-metal email infrastructure. At $0.10 per 1,000 outbound emails, it is the cheapest credible option on this list by raw unit cost. SES is a great fit for AWS-native engineering teams that want infrastructure-level control and don't need a polished dashboard.
Key features:
- $0.10 per 1,000 outbound emails, $0.10 per 1,000 inbound
- SMTP interface and HTTP API, with full IAM and VPC integration
- Configuration sets for routing events to SNS, SQS, Kinesis, CloudWatch
- Virtual Deliverability Manager add-on at $0.07 per 1,000
- Sandbox to production approval process for new accounts
Pricing: 3,000 emails/month free for the first 12 months on new AWS accounts. Beyond that, $0.10 per 1,000. Dedicated IPs at $24.95/month (standard) or $15/month with managed warmup plus per-email charges. SES pricing.
G2 rating: 4.3 stars across 192 reviews (G2 profile).
Pros: Lowest unit cost in the category, integrates natively with the AWS event stack, scales effortlessly to billions.
Cons: No real dashboards or analytics out of the box, sandbox-to-production approval can take days, you own deliverability ops including IP warmup and suppression management.
Best for: AWS-native engineering teams with in-house deliverability expertise and high send volume.
3. SendGrid
SendGrid, now part of Twilio, is the legacy market leader. It offers both transactional email API and marketing campaign tooling under one roof, with the broadest third-party integration library in the category. SendGrid is the Mailgun alternative most teams shortlist by default.
Key features:
- Email API and Marketing Campaigns on one platform
- Event Webhook with delivery, bounce, click, open, and spam events
- Automated IP warmup for new dedicated IPs
- Email Validation API for list hygiene
- Dynamic templates with Handlebars
Pricing: Free trial of 100 emails/day for 60 days (no longer a permanent free tier). Essentials starts at $19.95/month for 50,000 emails. Pro starts at $89.95/month and covers up to 2.5M emails. SendGrid pricing.
G2 rating: 4.0 stars across roughly 700 reviews (G2 profile).
Pros: Largest integration library in the category, mature platform with a long track record, combined transactional and marketing in one account.
Cons: Support quality complaints are common on lower tiers, shared-IP deliverability varies, the dashboard UI feels dated against newer entrants.
Best for: Enterprises already on Twilio or teams that want one vendor for transactional and marketing email.
4. Resend
Resend is the newest credible name on this list, built by founders previously at Vercel and other modern dev platforms. It is the Mailgun alternative for teams already on Next.js, React, or the modern JavaScript stack who want React-native template authoring.
Key features:
- React Email components for template authoring
- Idempotent send API to prevent duplicates on retries
- Audiences and broadcast capabilities
- Native SDKs for Node, Python, Ruby, Go, PHP
- Webhooks with delivery, bounce, complaint, click, open events
Pricing: Free tier 3,000 emails/month with a 100/day cap. Pro at $20/month for 50,000, $35/month for 100,000. Scale at $90/month for 100,000 with team features. Resend pricing.
G2 rating: 4.8 stars across 9 reviews on G2 (still a young listing): G2 profile.
Pros: Best-in-class developer experience, React Email is genuinely unique in the category, clean and concise docs.
Cons: Young company with less production scale than SES or SendGrid, marketing features are thin, support hours and depth still maturing.
Best for: Modern dev teams on a Next.js, React, or Vercel-adjacent stack who value developer experience above all.
5. Brevo
Brevo (formerly Sendinblue) is an all-in-one platform that bundles transactional email, marketing automation, CRM, and SMS. It is the Mailgun alternative for SMB teams whose use case is mixed: some transactional API sends, some marketing campaigns, all in one bill.
Key features:
- Transactional API and SMTP relay
- Marketing automation with drag-drop journey builder
- Built-in CRM with contact management
- SMS and WhatsApp channels included
- Segmentation by behavior and attributes
Pricing: Free tier 300 emails/day (around 9,000/month) permanent. Paid transactional plans start around $15/month. Marketing tiers are priced by contact count rather than send volume. Brevo pricing.
G2 rating: 4.5 stars across roughly 2,637 reviews on the Marketing Platform listing (G2 profile).
Pros: Permanent free tier with daily send allowance, non-developer UI for marketers, CRM and SMS included in the same platform.
Cons: Brand identity split between marketing and transactional, transactional-only teams pay for unused features, deliverability on shared pools is mixed.
Best for: SMB teams with mixed marketing and transactional needs who want one vendor for everything.
6. SparkPost (Bird)
SparkPost was an enterprise email infrastructure platform that has been rolled into Bird (formerly MessageBird) following acquisition. The legacy SparkPost brand still exists in the docs and product, but pricing and packaging now live inside Bird's broader CRM and messaging suite.
Key features:
- High-volume sending infrastructure with proven enterprise scale
- Signals deliverability analytics with engagement scoring
- Subaccount architecture for multi-tenant and multi-brand sending
- Dedicated IPs and IP pools
- A/B testing on templates
Pricing: Transparent transactional tiers are no longer published. Pricing is custom through Bird sales. Legacy tier references (Premier around $75/month for 50,000) still appear on some review sites but should be confirmed with the vendor.
G2 rating: 4.0 stars across roughly 64 reviews on the legacy SparkPost listing (G2 profile).
Pros: Strong analytics through Signals, proven at massive scale, subaccount architecture is enterprise-ready.
Cons: Opaque public pricing post-Bird acquisition, product roadmap unclear, SparkPost as a standalone brand is effectively being absorbed.
Best for: Enterprise high-volume senders willing to negotiate a contract and live inside Bird's product suite.
7. MailerSend
MailerSend is a transactional email service built for product teams that want a drag-drop template editor non-developers can use, paired with a clean transactional API. It positions itself between Mailgun and the marketing-first ESPs.
Key features:
- Drag-drop and HTML template editors in the same UI
- API, SMTP, and SDKs for Node, PHP, Python, Go, Ruby, Laravel
- Inbound routing with parsing
- Multi-user roles for separating marketing and engineering access
- Email verification credits included on most plans
Pricing: Free tier 500 emails/month plus 10 verification credits. Hobby at $5.60/month for 5,000 emails. Starter and Professional at $25/month and up for 50,000. Overage at $0.90 per 1,000. MailerSend pricing.
G2 rating: Around 4.6 stars across 46 reviews (G2 profile).
Pros: Cheap entry tier, clean template editor that non-developers can use, multi-tenant roles built in.
Cons: Smaller deliverability operations team than the incumbents, advanced analytics are weaker, international sending caps apply on lower tiers.
Best for: SMB product teams that want a cheap transactional API plus a usable UI for marketing and design teammates.
8. SMTP2GO
SMTP2GO is an SMTP relay specialist. It's the Mailgun alternative for teams running WordPress, legacy applications, or any system whose easiest integration path is plain SMTP rather than HTTP API.
Key features:
- SMTP relay with global points-of-presence
- HTTP API with the same feature surface as SMTP
- Real-time analytics dashboard
- Dedicated IPs and subaccounts
- 30-day money-back guarantee on paid plans
Pricing: Free tier 1,000 emails/month with a 200/day cap. Starter at $10/month for 10,000. Professional at $75/month for 100,000. Premier custom for 3M+. SMTP2GO pricing.
G2 rating: 4.7 stars across 226 reviews (G2 profile).
Pros: Cheapest 100,000-email tier on this list at $75/month, strong G2 sentiment, live chat support on paid plans.
Cons: Less developer-modern (no React Email or component-native authoring), analytics simpler than Postmark or SendGrid, marketing features minimal.
Best for: WordPress sites, legacy app owners, and teams that need a reliable SMTP drop-in with predictable pricing.
9. Mailtrap
Mailtrap began as a developer testing sandbox (capture-only inboxes for staging environments) and has since added a production email sending API. The combined product is a strong fit for teams that want both testing and sending under one vendor.
Key features:
- Email Sending API and SMTP for production traffic
- Email Testing sandbox inboxes for staging and CI
- Template management with variables
- Deliverability monitoring and inbox placement scoring
- Up to 30 days of log retention on standard plans
Pricing: Free tier 4,000 emails/month with a 150/day cap. Basic at $15/month for 10,000 (up to $30 for 50,000). Business at $85/month for 100,000 (up to $450/month for 750,000). Enterprise from $750/month for 1.5M. Mailtrap pricing.
G2 rating: 4.8 stars across roughly 90 reviews (G2 profile).
Pros: Unique combination of sending and testing in one vendor, clean developer experience, competitive 100,000-email tier at $85.
Cons: Newer to production-scale sending compared with Postmark or SES, marketing features are thin, the brand is still primarily associated with testing.
Best for: Engineering teams that want a single vendor for testing inboxes and production transactional sending.
How to Choose the Right Mailgun Alternative
The shortlist depends on what you actually need. A simple decision frame:
- If deliverability is the priority: Postmark for transactional-only, SendGrid if you also send marketing.
- If unit cost is the priority: Amazon SES at $0.10 per 1,000. Plan to invest in deliverability ops.
- If developer experience is the priority: Resend for modern stacks, MailerSend for product teams with non-dev contributors.
- If you want a free permanent tier: Brevo (300/day) or SMTP2GO (1,000/month).
- If you need testing and sending in one vendor: Mailtrap.
- If you're an enterprise: SparkPost via Bird, or SendGrid Pro.
One thing worth checking before you sign: how long the vendor stores delivery logs on your chosen tier. Inbox placement issues often surface days after the send, and 5-day retention on Mailgun's Foundation tier is part of why teams switch in the first place.
Beyond Email: When You Need Notification Orchestration
The nine tools above are alternatives at the delivery layer - they replace the part of Mailgun that puts an email in an inbox. SuprSend sits one layer above them. It doesn't replace your email vendor; it routes to whichever one you choose (Mailgun, Postmark, SES, SendGrid, Resend, and others), and adds SMS, push, in-app inbox, WhatsApp, and Slack as first-class channels alongside email.
That's the layer SuprSend sits at. It's notification infrastructure: you integrate once, and SuprSend orchestrates delivery across whichever channel and vendor combination you've configured. Email goes through your provider of choice (Mailgun, SendGrid, Amazon SES, Postmark, Resend, and others). SMS, push, WhatsApp, in-app inbox, and Slack are first-class channels alongside email.
Concretely, SuprSend adds:
- Visual workflows with delays, batching, branching, vendor fallback, and timezone-aware delivery
- Preference center so users control which categories and channels they receive
- Drop-in in-app inbox SDKs for React, Vue, Angular, Flutter, React Native, iOS, Android
- Vendor fallback: if your primary email provider has an outage, SuprSend retries through a secondary
- Step-by-step delivery logs and analytics across every channel
If your product needs more than email (and most products eventually do), the question stops being "which Mailgun alternative" and becomes "do we want one vendor per channel, or one orchestration layer that routes across all of them." That comparison is covered in the CPaaS vs notification infrastructure guide.
Frequently Asked Questions
Is Mailgun being deprecated or shut down?
No. Mailgun is still operating as a Sinch-owned product. The switching trend is driven by pricing changes (the Flex plan moving to $2 per 1,000 in December 2025) and feature gaps on entry tiers, not a wind-down.
What is the cheapest Mailgun alternative for high volume?
Amazon SES at $0.10 per 1,000 outbound emails. The trade-off is that SES has no native dashboard or warmup automation. You'll either need in-house deliverability expertise or an orchestration layer on top.
What is the best Mailgun alternative for developer experience?
Resend is the clearest answer for modern JavaScript stacks (React Email components, idempotent API, clean SDKs). Postmark is the strongest choice if developer experience and deliverability matter equally.
Which Mailgun alternative has the longest log retention?
Postmark retains 45 days by default, extendable to 365. Mailtrap retains 30 days on standard plans. Mailgun's Foundation tier retains 5 days, which is one of the most cited reasons teams switch.
Can I migrate from Mailgun without dropping emails?
Yes. The pattern is: set up the new vendor, verify SPF and DKIM, dual-send a small percentage of traffic, monitor deliverability for 7-14 days, then cut over fully. Export your suppression list from Mailgun before flipping DNS to avoid sending to known bounces and complaints.
Do I need a dedicated IP?
Only above 100,000-300,000 emails per month, and only if your sender reputation needs to be isolated from a shared pool. Most teams under 100,000 per month are better served by a strong shared-IP provider like Postmark or SendGrid than by a dedicated IP they don't have the volume to warm up properly.
What is the best free Mailgun alternative?
Brevo (300/day permanent) or Mailtrap (4,000/month permanent) for transactional-only use cases. Resend offers 3,000/month free, which is enough for early-stage products.
TL;DR
Nine credible Mailgun alternatives in 2026: Postmark, Amazon SES, SendGrid, Resend, Brevo, SparkPost (Bird), MailerSend, SMTP2GO, and Mailtrap. The right pick depends on which axis matters most: deliverability (Postmark), unit cost (SES), developer experience (Resend), permanent free tier (Brevo, SMTP2GO), or enterprise scale (SendGrid, Bird). If your product needs more than email, the better question is whether to keep adding single-channel vendors or to put a notification orchestration layer in front of all of them.
Next Steps
If email is one of several channels you need to send (or will need to send soon), start by mapping where email fits in your broader notification stack. The email notification pillar guide covers the architecture decisions, and SuprSend's pricing includes 10,000 free notifications per month across every channel.
Start building for free or book a demo to see how channel orchestration fits on top of your chosen email vendor.
