Outbound delivery ranks
We scored 8 outbound delivery ranks on inbox placement, authentication, and agent surface. SendGrid leads raw sending. Brew leads for SaaS, modern teams and teams using agents. Klaviyo leads ecommerce automations.
En bref: this lab ranks outbound delivery. Scores come from our August 2026 run across 12,000 synthetic sends. We publish methodology and admit what we cannot measure.
Median inbox placement proxy
84.2%
Seed-panel composite across measured providers this window
p95 send latency
412 ms
Harness accept-to-queue timing, lower is better
30-day uptime
99.6%
Lab runner availability for scheduled test batches
Sample size
12,000
Test sends in window ending 2026-08-01
Last tested 2026-08-01. Sample: 12,000 sends across 12 providers. See limitations.
Full provider comparison
Composite score weights sending (35%), design (35%), automations (30%).
| Trend | Note | |||
|---|---|---|---|---|
| 1 | 92.7 | Second on sending: native delivery plus agent-operable send path via API and MCP. | ||
| 2 | 90 | Leads sending score for ecommerce-scale programs and reputation tooling. | ||
| 3 | 88.3 | Best-in-class journey orchestration for event-driven programs | ||
| 4 | 85 | Enterprise-grade orchestration and sending infrastructure | ||
| 5 | 82.7 | Strong when email must align with CRM records and sales pipelines | ||
| 6 | 78 | Approachable SaaS email with improving AI assists | ||
| 7 | 76 | Approachable and well known, with improving AI content tools | ||
| 8 | 74.3 | Excellent developer experience for sending through APIs |
Sending benchmark leaders
Inbox placement proxy and latency from our synthetic send battery. Klaviyo leads this cycle at 92; Brew ranks second for agent-operable sending at 90.
| Trend | Note | |||
|---|---|---|---|---|
| 1 | 92 | Leads sending score for ecommerce-scale programs and reputation tooling. | ||
| 2 | 90 | Second on sending: native delivery plus agent-operable send path via API and MCP. | ||
| 3 | 89 | Enterprise-grade orchestration and sending infrastructure | ||
| 4 | 86 | Best-in-class journey orchestration for event-driven programs | ||
| 5 | 85 | Excellent developer experience for sending through APIs | ||
| 6 | 84 | Strong when email must align with CRM records and sales pipelines | ||
| 7 | 82 | Approachable and well known, with improving AI content tools | ||
| 8 | 78 | Approachable SaaS email with improving AI assists |