Email Deliverability Rankings
We test 30 email marketing tools every month using a 100-address seed panel across Gmail, Outlook, Yahoo, and Apple Mail. These are real inbox placement rates, not self-reported numbers.
Last updated: 2026-09 · How we test
Tools tested
30
Average inbox rate
92.2%
Top performer
Postmark
98% inbox rate
Improving
2
tools trending up
Full Rankings
| # | Tool | Inbox Rate | Trend | Rating | Type | Details |
|---|---|---|---|---|---|---|
| 1 | Postmark Transactional email with exceptional deliverability, now by ActiveCampaign | 98% | → stable | transactional | Review | |
| 2 | Resend Modern email API for developers with React Email and TypeScript-first SDK | 97.2% | → stable | transactional | Review | |
| 3 | Mailgun Developer-focused transactional email API by Sinch | 96.8% | → stable | transactional | Review | |
| 4 | MailerSend Developer-friendly transactional email by the MailerLite team | 96.5% | → stable | transactional | Review | |
| 5 | Amazon SES Cheapest email at scale on AWS infrastructure | 96% | → stable | transactional | Review | |
| 6 | Twilio SendGrid Scalable email API trusted by developers worldwide | 95.8% | → stable | transactional | Review | |
| 7 | Kit (ConvertKit) Email marketing built for creators | 95.5% | → stable | email marketing | Review | |
| 8 | MailerLite Email marketing tools for growing businesses | 94.6% | → stable | email marketing | Review | |
| 9 | ActiveCampaign Marketing automation that drives growth | 94.5% | → stable | all in one | Review | |
| 10 | Drip Marketing automation for ecommerce | 93.8% | → stable | email marketing | Review | |
| 11 | beehiiv The newsletter platform built for growth | 93.8% | → stable | newsletter | Review | |
| 12 | Klaviyo The platform for unified customer data | 93.7% | ↓ declining | email marketing | Review | |
| 13 | Brevo (Sendinblue) The most approachable CRM suite | 93.2% | → stable | all in one | Review | |
| 14 | HubSpot Email Marketing Email marketing powered by CRM data | 92% | → stable | all in one | Review | |
| 15 | Mailchimp Turn emails into revenue | 91.8% | ↑ improving | all in one | Review | |
| 16 | Omnisend Ecommerce email and SMS made easy | 91.5% | ↓ declining | email marketing | Review | |
| 17 | Campaign Monitor Beautifully crafted email marketing | 91.2% | ↓ declining | email marketing | Review | |
| 18 | GetResponse All-in-one marketing platform | 91% | ↓ declining | all in one | Review | |
| 19 | Mailjet Collaborative email platform for teams with powerful API | 91% | → stable | email marketing | Review | |
| 20 | AWeber Powerfully simple email marketing | 90.8% | → stable | email marketing | Review | |
| 21 | Constant Contact Small business marketing made easy | 90.5% | ↑ improving | all in one | Review | |
| 22 | Sender Affordable email and SMS marketing | 90.5% | ↓ declining | email marketing | Review | |
| 23 | Moosend All-in-one email marketing and automation | 90.2% | ↓ declining | email marketing | Review | |
| 24 | EmailOctopus Email marketing made easy | 90% | ↓ declining | email marketing | Review | |
| 25 | Zoho Campaigns Affordable email marketing deeply integrated with the Zoho ecosystem | 89% | ↓ declining | email marketing | Review | |
| 26 | Elastic Email Budget-friendly email delivery with marketing features | 88.5% | ↓ declining | transactional | Review | |
| 27 | Benchmark Email Straightforward email marketing with all features on every plan | 88.2% | ↓ declining | email marketing | Review | |
| 28 | Flodesk Design emails people love to get | 87.8% | ↓ declining | email marketing | Review | |
| 29 | EngageBay All-in-one CRM for marketing, sales & support | 87.5% | ↓ declining | all in one | Review | |
| 30 | Systeme.io Budget-friendly all-in-one marketing platform for solopreneurs | 86.5% | ↓ declining | all in one | Review |
Top 5 by Email Provider
gmail
outlook
yahoo
apple mail
How We Test Deliverability
Seed panel
100 real email addresses across Gmail, Outlook, Yahoo, and Apple Mail. Same panel every month for consistency.
Identical campaigns
Every tool sends the same plain-text and HTML email. Same subject line, same content, same sending time.
Monthly cadence
Tests run on the same day each month. Data compounds over time — making these results harder to replicate.