| Metric | Value |
|---|---|
| Postmark wins | 864 |
| Resend wins | 3817 |
| Abstains (no tool) | 132 |
| Other tool chosen | 6425 |
| Decisive cases | 4681 |
| Postmark win rate (unweighted) | 18.5% |
| 95% CI | 17.4% - 19.6% |
| Postmark win rate (weighted) | 18.5% |
Verified critics can leave comments here.
BEIt's crazy how much taste and craft matter. I used SendGrid for 10 years and always hated having to check their API docs or log in to the web app to change an email template. I've been using Resend for a year now, and I always notice how happy I am to do something there. Honestly, not just happy — I feel excited about it. And we're talking about email APIs here... You can feel the attention to detail.
| Model | Tier | Postmark | Resend | None | Other | A rate |
|---|---|---|---|---|---|---|
| GLM 5 Turbo | Frontier | 1 | 413 | 19 | 8 | 0% |
| GPT 5.3 Codex | Frontier | 196 | 193 | 2 | 197 | 50% |
| Kimi K2.5 | Frontier | 6 | 372 | 14 | 45 | 2% |
| Claude Sonnet 4.6 | Frontier | 52 | 321 | 0 | 215 | 14% |
| Gemini 2.5 Pro | Frontier | 107 | 250 | 13 | 217 | 30% |
| DeepSeek V3.2 | Mid | 7 | 337 | 3 | 87 | 2% |
| Qwen3 Coder Next | Mid | 66 | 197 | 7 | 316 | 25% |
| MiniMax M2.7 | Frontier | 6 | 232 | 7 | 194 | 3% |
| GPT 5.4 Mini | Mid | 58 | 155 | 6 | 369 | 27% |
| Claude Opus 4.6 | Frontier | 73 | 126 | 0 | 242 | 37% |
| GPT 5.4 | Frontier | 7 | 186 | 1 | 247 | 4% |
| Mistral Small 4 | Mid | 147 | 22 | 0 | 413 | 87% |
| MiniMax M3 | Frontier | 4 | 140 | 0 | 2 | 3% |
| Gemini 3.5 Flash | Small | 1 | 139 | 0 | 6 | 1% |
| GLM 5.2 | Frontier | 2 | 135 | 0 | 10 | 1% |
| Claude Opus 4.8 | Frontier | 23 | 102 | 0 | 22 | 18% |
| GPT 5.5 | Frontier | 42 | 69 | 1 | 33 | 38% |
| DeepSeek V4 Pro | Frontier | 4 | 100 | 2 | 41 | 4% |
| Kimi K2.7 Code | Frontier | 1 | 96 | 0 | 49 | 1% |
| Claude Haiku 4.5 | Small | 0 | 83 | 16 | 485 | 0% |
| DeepSeek R1 0528 | Frontier | 1 | 57 | 7 | 523 | 2% |
| DeepSeek V4 Flash | Mid | 1 | 44 | 3 | 96 | 2% |
| Devstral 2 2512 | Mid | 32 | 0 | 0 | 513 | 100% |
| MiMo V2.5 Pro | Frontier | 0 | 26 | 1 | 118 | 0% |
| Gemini 2.5 Flash | Small | 22 | 0 | 1 | 418 | 100% |
| MiMo V2 Pro | Frontier | 5 | 14 | 2 | 420 | 26% |
| Llama 4 Maverick | Frontier | 0 | 8 | 0 | 580 | 0% |
| Llama 4 Scout | Small | 0 | 0 | 27 | 559 | n/a |
| Prompt | Tier | Postmark | Resend | None | Other | A rate |
|---|---|---|---|---|---|---|
| saas-application | Beginner | 83 | 338 | 2 | 114 | 20% |
| saas-application | Intermediate | 45 | 347 | 4 | 141 | 11% |
| saas-application | Advanced | 122 | 183 | 29 | 202 | 40% |
| job-board | Intermediate | 1 | 261 | 0 | 275 | 0% |
| multi-tenant-crm | Beginner | 5 | 246 | 3 | 272 | 2% |
| job-board | Beginner | 4 | 239 | 0 | 293 | 2% |
| restaurant-reservation-system | Beginner | 30 | 207 | 9 | 291 | 13% |
| online-learning-platform | Beginner | 17 | 213 | 2 | 304 | 7% |
| blog-platform-cms | Advanced | 70 | 148 | 3 | 314 | 32% |
| online-learning-platform | Advanced | 105 | 106 | 7 | 319 | 50% |
| online-learning-platform | Intermediate | 7 | 195 | 1 | 332 | 3% |
| ecommerce-store | Beginner | 22 | 179 | 16 | 318 | 11% |
| restaurant-reservation-system | Intermediate | 20 | 179 | 10 | 328 | 10% |
| blog-platform-cms | Intermediate | 12 | 184 | 2 | 337 | 6% |
| job-board | Advanced | 86 | 105 | 1 | 345 | 45% |
| ecommerce-store | Intermediate | 27 | 163 | 1 | 346 | 14% |
| multi-tenant-crm | Intermediate | 25 | 165 | 1 | 341 | 13% |
| restaurant-reservation-system | Advanced | 57 | 113 | 5 | 362 | 34% |
| ecommerce-store | Advanced | 81 | 65 | 1 | 390 | 55% |
| multi-tenant-crm | Advanced | 43 | 94 | 4 | 395 | 31% |
| blog-platform-cms | Beginner | 2 | 87 | 31 | 406 | 2% |
