Mailgun vs Twilio SendGrid
Mailgun and Twilio SendGrid are both popular choices in the transactional email service space. Both start at $15/mo. Mailgun offers a free plan (100 emails/day (5,000/month), 1 domain, basic tracking), while Twilio SendGrid does not. Twilio SendGrid has the edge with marketing automation, A/B testing, ecommerce integrations.
Quick Verdict
Mailgun wins on deliverability, rating, free tier.
Twilio SendGrid wins on integrations.
Best for most users: Mailgun (developers).
Mailgun
Developer-focused transactional email API by Sinch
Mailgun is a Sinch-owned transactional email API platform founded in 2010, designed for developers who need reliable, high-volume email delivery via REST API or SMTP. It offers email validation, inbox placement testing, and send-time optimization, making it a solid choice for SaaS companies and engineering teams building custom email workflows.
Twilio SendGrid
Scalable email API trusted by developers worldwide
Twilio SendGrid is a cloud-based email delivery platform founded in 2009 and acquired by Twilio for $2 billion in 2019. It uniquely splits its offering into a developer-focused Email API (for transactional messages) and a marketer-focused Marketing Campaigns product, each with separate pricing. With 320 integrations and SDKs in multiple languages, it remains the go-to choice for engineering teams that need reliable, high-volume email infrastructure.
Feature Comparison
| Feature | Mailgun | Twilio SendGrid |
|---|---|---|
| Rating | 4.2/5 | 4/5 |
| Starting Price | $15/mo | $15/mo |
| Free Plan | 100 emails/day (5,000/month), 1 domain, basic tracking | No free plan |
| Founded | 2010 | 2009 |
| Email Templates | 25 | 60 |
| Integrations | 40 | 320 |
| Deliverability Rate | 97% | 95.5% |
| Marketing Automation | No | Yes |
| A/B Testing | No | Yes |
| Landing Pages | No | No |
| Segmentation | No | Yes |
| Drag & Drop Editor | No | Yes |
| SMS Marketing | No | No |
| Ecommerce Features | No | Yes |
| API Access | Yes | Yes |
| Multi-Language | No | No |
| Web Push Notifications | No | No |
| Live Chat | No | No |
| Advanced Analytics | Yes | Yes |
Mailgun: Pros & Cons
Pros
- + Powerful RESTful API with well-structured SDKs for Python, Ruby, Node.js and more, making integration painless for developers
- + Real-time dashboards for delivery, bounce, spam complaints, and click rates provide clear campaign health visibility
- + Handles very high email volumes reliably with strong deliverability and fast sending speeds
- + Built-in email validation and inbox placement testing tools (Mailgun Optimize) for deliverability optimization
- + Flexible routing rules, webhooks, and event tracking simplify debugging and monitoring email performance
Cons
- − Pricing escalates quickly at higher volumes and premium features like dedicated IPs ($59/mo) and validations cost extra
- − No built-in drag-and-drop email editor or marketing automation features — purely developer-focused
- − Setup requires technical knowledge; non-developers will struggle with DNS configuration and API integration
- − UI dashboard feels outdated in certain sections compared to modern competitors like Resend
- − Lower-tier plans use shared IP addresses which can impact deliverability if other senders have poor practices
Twilio SendGrid: Pros & Cons
Pros
- + Industry-leading RESTful API with SDKs in 7 languages and clear documentation, enabling integration in under 2 hours
- + 320 native integrations including Zapier, Shopify, Oracle, Litmus, and Drift
- + 95.5% delivery rate with dedicated IP options and deliverability optimization tools on Pro plans
- + Detailed analytics suite with geographical breakdown, client usage stats, and real-time event webhooks
- + Handles massive scale with plans supporting up to 2.5 million emails/month on self-serve and 5M+ on enterprise
Cons
- − Customer support is slow with tickets taking days or weeks; phone support reserved for Custom plan customers only
- − Steep pricing jumps at scale — moving from 200K to 250K emails/month increases cost from $89.95 to $249/month
- − Shared IP pools on lower tiers cause frequent blacklisting and unreliable inbox placement
- − Automation builder limited to a single trigger (list join) with only one condition (time delay), far behind competitors
- − Visual email editor and template system feel dated with poor color contrast and counterintuitive design compared to modern platforms
The Verdict
Mailgun edges ahead with a 4.2/5 rating compared to Twilio SendGrid's 4/5. The gap comes mainly from deliverability (4.5 vs 4) and value for money (4.7 vs 4.4). On deliverability, Mailgun reports 97% compared to 95.5% for Twilio SendGrid — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Mailgun | Twilio SendGrid |
|---|---|---|---|
| Starting Price | 30% | $15/mo | $15/mo |
| Deliverability | 25% | 97% Winner | 95.5% |
| Rating | 25% | 4.2/5 Winner | 4/5 |
| Integrations | 10% | 40 | 320 Winner |
| Free Tier | 10% | Yes Winner | No |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Mailgun if…
- + You need a free plan to get started
- + You're a developers
- + You're a saas companies
Choose Twilio SendGrid if…
- + You need marketing automation
- + You need ecommerce integrations
- + You need A/B testing
- + You're a developers needing transactional email api