| 1 |
Postmark |
|
10/10 |
1 | 1 | 1 | 2 | 3 | 3 | 1 | 1 | 1 | 3 |
- Claude Haiku 5.5 (#1) Excellent deliverability for transactional mail, with fast delivery and strong bounce handling.
- GPT-6 Luna (#1) Purpose-built for transactional email, with excellent deliverability, clear analytics, and dependable developer tools.
- Gemini 4 Argon (#1) Industry-leading deliverability and speed by strictly separating transactional and promotional email streams.
- Kimi K3 (#1) Purpose-built for transactional mail with best-in-class deliverability and speed.
- MiniMax M3 (#1) Fastest delivery, excellent reliability, great developer experience
- Mistral Large 4 (#1) Fastest delivery and highest inbox placement; built specifically for app emails.
- Qwen 3.8 Flash (#2) Purpose-built for transactional mail, fastest inbox speeds.
- DeepSeek V4 Pro (#3) Fastest delivery speeds, perfect for critical transactional emails
- GLM-5.3 (#3) Best-in-class deliverability and support for transactional email specifically.
- Nemotron 3 Ultra (#3) Best deliverability focus, lightning-fast delivery, great for critical transactional emails
|
| 2 |
SendGrid |
|
10/10 |
3 | 4 | 5 | 3 | 1 | 2 | 3 | 2 | 2 | 1 |
- DeepSeek V4 Pro (#1) Best overall balance of deliverability, ease of use, and generous free tier
- Nemotron 3 Ultra (#1) Industry standard with excellent deliverability and developer-friendly APIs
- GLM-5.3 (#2) Market standard API, reliable delivery, scales with any app size.
- MiniMax M3 (#2) Industry leader, scalable, strong documentation and deliverability
- Mistral Large 4 (#2) Best deliverability, generous free tier, excellent APIs and docs for developers.
- Claude Haiku 5.5 (#3) Mature API, broad feature set, and solid deliverability for sign-ups and resets.
- Qwen 3.8 Flash (#3) Huge developer adoption, reliable transactional API, good docs.
- Kimi K3 (#3) Mature platform, great docs and APIs, huge ecosystem for transactional email.
- GPT-6 Luna (#4) Mature, scalable platform with broad integrations and useful delivery monitoring.
- Gemini 4 Argon (#5) Mature, feature-rich platform with comprehensive analytics and proven high-volume infrastructure.
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| 3 |
Amazon SES |
|
10/10 |
2 | 2 | 3 | 1 | 4 | 1 | 2 | 4 | 4 | 4 |
- Qwen 3.8 Flash (#1) Best price at scale, strong deliverability, developer standard.
- GLM-5.3 (#1) Cheapest at scale, AWS integration, excellent deliverability.
- Claude Haiku 5.5 (#2) Very low cost at scale, reliable, and widely trusted for app emails.
- GPT-6 Luna (#2) Highly scalable, cost-effective sending with strong infrastructure; setup and deliverability management need more expertise.
- Kimi K3 (#2) Unbeatable cost at scale, rock-solid infrastructure, deliverability requires care.
- Gemini 4 Argon (#3) Unbeatable cost-effectiveness and massive scalability for teams willing to handle initial AWS setup.
- DeepSeek V4 Pro (#4) Ultra-low cost at scale, tight AWS integration, very reliable
- MiniMax M3 (#4) Extremely cheap, highly scalable, integrates with AWS ecosystem
- Mistral Large 4 (#4) Cheapest by far at scale; reliable but requires more setup and deliverability tuning.
- Nemotron 3 Ultra (#4) Most cost-effective at scale, reliable AWS infrastructure integration
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| 4 |
Mailgun |
|
10/10 |
4 | 5 | 4 | 4 | 2 | 4 | 4 | 3 | 3 | 2 |
- DeepSeek V4 Pro (#2) Developer-first API, excellent deliverability, strong for high-volume sending
- Nemotron 3 Ultra (#2) Powerful API, excellent parsing, strong routing and webhook capabilities
- MiniMax M3 (#3) Developer-friendly API, solid deliverability, good pricing
- Mistral Large 4 (#3) Powerful API, flexible routing, strong for developers needing fine-grained control.
- Claude Haiku 5.5 (#4) Developer-friendly API with good logs and flexible regional sending options.
- Gemini 4 Argon (#4) Powerful API-first service with advanced email validation, routing, and detailed delivery logs.
- Qwen 3.8 Flash (#4) Powerful routing and parsing APIs popular with developers.
- GLM-5.3 (#4) Developer-friendly API, strong logging and analytics.
- Kimi K3 (#4) Developer-first APIs, strong validation and routing, excellent log retention.
- GPT-6 Luna (#5) Flexible APIs, detailed deliverability controls, and solid support for high-volume application email.
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| 5 |
Resend |
|
10/10 |
5 | 3 | 2 | 5 | 6 | 5 | 5 | 5 | 5 | 6 |
- Gemini 4 Argon (#2) Modern developer experience with sleek APIs and native React email template support.
- GPT-6 Luna (#3) Modern developer experience, straightforward APIs, and convenient templates for product emails.
- Claude Haiku 5.5 (#5) Modern developer experience with clean APIs and quick setup for app email.
- Qwen 3.8 Flash (#5) Modern DX, great React email tooling, fast-growing choice.
- GLM-5.3 (#5) Modern API, excellent React SDK, fast developer experience.
- Kimi K3 (#5) Modern developer experience, React email support, fast-growing reliability reputation.
- MiniMax M3 (#5) Modern API, React Email integration, growing rapidly
- Mistral Large 4 (#5) Modern developer experience, beautiful docs, excellent React Email integration.
- DeepSeek V4 Pro (#6) Modern developer experience, React email support, rising star
- Nemotron 3 Ultra (#6) Developer-first experience, React email templates, modern stack
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| 6 |
Brevo |
|
10/10 |
6 | 6 | 8 | 6 | 7 | 7 | 6 | 6 | 6 | 8 |
- Claude Haiku 5.5 (#6) Affordable plans with transactional API and SMTP, plus marketing tools.
- GPT-6 Luna (#6) Accessible transactional email API with an approachable interface and room to expand into marketing.
- Qwen 3.8 Flash (#6) Generous free tier, affordable transactional sending volume.
- Kimi K3 (#6) Generous free tier, solid deliverability, combined marketing and transactional streams.
- MiniMax M3 (#6) Generous free tier, combined transactional and marketing features
- Mistral Large 4 (#6) Great value with generous free tier, solid for startups needing email plus marketing tools.
- DeepSeek V4 Pro (#7) Solid free tier, built-in CRM, good for mixed transactional and marketing
- GLM-5.3 (#7) All-in-one with transactional API, affordable pricing.
- Gemini 4 Argon (#8) Versatile platform offering a generous free tier alongside reliable SMTP and API sending.
- Nemotron 3 Ultra (#8) Formerly Sendinblue, good all-in-one with marketing automation included
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| 7 |
SparkPost |
|
9/10 |
8 | 7 | 7 | | 5 | 6 | 7 | 8 | 8 | 5 |
- DeepSeek V4 Pro (#5) Enterprise-grade analytics, strong deliverability optimization
- Nemotron 3 Ultra (#5) High-volume specialist, predictive analytics, enterprise-grade deliverability
- GLM-5.3 (#6) Strong deliverability data and enterprise-grade infrastructure.
- GPT-6 Luna (#7) Powerful delivery analytics and infrastructure suited to teams sending substantial email volumes.
- Gemini 4 Argon (#7) Enterprise-grade sending power with predictive analytics and deep deliverability insights.
- Kimi K3 (#7) Strong analytics and deliverability for high-volume enterprise senders.
- Claude Haiku 5.5 (#8) Strong analytics and enterprise-grade deliverability for large senders.
- MiniMax M3 (#8) Strong analytics, high deliverability at enterprise scale
- Mistral Large 4 (#8) Enterprise-grade deliverability with detailed analytics and dedicated IP options.
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| 8 |
Mailjet |
|
7/10 |
7 | 8 | | 7 | | 8 | 8 | 7 | | 10 |
- Claude Haiku 5.5 (#7) Reliable transactional sending with templates and reasonable pricing.
- Qwen 3.8 Flash (#7) Solid transactional plus collaborative design tools, EU hosting.
- MiniMax M3 (#7) EU-based, good pricing, real-time analytics and templates
|
| 9 |
Mandrill |
|
6/10 |
| | 9 | | 8 | 9 | 9 | | 7 | 9 |
- Mistral Large 4 (#7) Easy Mandrill alternative with familiar UI; good for teams already on Mailchimp.
- DeepSeek V4 Pro (#8) Tightly integrated with Mailchimp ecosystem, reliable templating
- Gemini 4 Argon (#9) Convenient, reliable transactional add-on for businesses already invested in the Mailchimp ecosystem.
- GLM-5.3 (#9) Mailchimp's transactional arm, good if already in that ecosystem.
- Kimi K3 (#9) Excellent templates and deliverability for Mailchimp users via Mandrill engine.
|
| 10 |
MailerSend |
|
5/10 |
| 10 | 10 | | 9 | 10 | | | | 7 |
- Nemotron 3 Ultra (#7) Modern API, generous free tier, intuitive dashboard and templates
- GPT-6 Luna (#10) Developer-friendly API paired with simple templates, logs, and team collaboration features.
- Gemini 4 Argon (#10) Intuitive interface and collaborative template builders ideal for both developers and non-technical teams.
- GLM-5.3 (#10) Great value, clean API, generous free tier.
|
| 11 |
SMTP2GO |
|
4/10 |
| 9 | | 9 | 10 | | 10 | | | |
- GPT-6 Luna (#9) Easy-to-operate sending service with useful diagnostics and dependable transactional capabilities.
- Qwen 3.8 Flash (#9) Simple reliable SMTP relay with strong support.
- DeepSeek V4 Pro (#10) Dead-simple SMTP relay, excellent deliverability monitoring and reporting
- Kimi K3 (#10) Reliable global delivery, great support, simple setup for transactional streams.
|
| 12 |
Mailtrap |
|
1/10 |
| | 6 | | | | | | | |
- Gemini 4 Argon (#6) Combines safe email sandbox testing with a fast, reliable production transactional sending infrastructure.
|
| 13 |
Customer.io |
|
2/10 |
| | | | | | | 9 | 9 | |
- MiniMax M3 (#9) Excellent for behavior-based transactional messaging workflows
- Mistral Large 4 (#9) Strong automation and segmentation; ideal when transactional and lifecycle emails merge.
|
| 14 |
EmailJS |
|
1/10 |
| | | 8 | | | | | | |
|
| 15 |
Postal |
|
1/10 |
9 | | | | | | | | | |
|