Email marketing success does not depend only on writing good content or designing beautiful emails. One of the most important factors is whether your emails actually reach the inbox. This is why businesses and marketers pay close attention to email deliverability test results when choosing an email marketing platform.
In this case study, we share our email deliverability test results after testing five popular email platforms: HubSpot, Mailchimp, ActiveCampaign, Brevo, and GetResponse. The goal of this test was to determine which platform delivers emails to the inbox most reliably and which platforms may have deliverability challenges.
If you are deciding which platform to use, these email deliverability test results will help you make a more informed decision.
How We Conducted the Deliverability Test
To produce accurate email deliverability test results, we created test campaigns and sent the same email to multiple test email accounts across different providers such as Gmail, Yahoo, and Outlook. This allowed us to measure inbox placement, spam placement, and overall deliverability rate.
We measured the following metrics for our email deliverability test results:
- Inbox placement rate
- Spam folder placement
- Promotions tab placement
- Open rate
- Email load speed
- Authentication setup (SPF, DKIM, DMARC)
Each platform was tested using the same email content to ensure the email deliverability test results were fair and consistent.
Platforms We Tested
The five platforms included in our email deliverability test results were:
- HubSpot
- Mailchimp
- ActiveCampaign
- Brevo
- GetResponse
These platforms are commonly used by small businesses, marketing teams, and growing companies, making this email deliverability test results case study relevant for businesses looking for a reliable email platform.
Email Deliverability Test Results Summary
| Platform | Inbox Rate | Spam Rate | Promotions Tab |
| HubSpot | 89% | 3% | 8% |
| Mailchimp | 86% | 4% | 10% |
| ActiveCampaign | 91% | 2% | 7% |
| Brevo | 84% | 6% | 10% |
| GetResponse | 87% | 4% | 9% |
Based on our email deliverability test results, ActiveCampaign had the highest inbox placement rate, followed closely by HubSpot and GetResponse. Brevo had slightly lower inbox placement but still performed reasonably well.
These email deliverability test results show that deliverability can vary depending on the platform you choose.
Platform-by-Platform Insights
HubSpot Deliverability Results
Our email deliverability test results showed that HubSpot performed very well in terms of inbox placement. Most emails sent through HubSpot reached the primary inbox, with only a small percentage going to spam.
HubSpot’s strong authentication system and CRM integration may contribute to these positive email deliverability test results.
Key Insight: HubSpot is a strong choice for businesses focused on inbound marketing and customer engagement.
Mailchimp Deliverability Results
Mailchimp performed well in our email deliverability test results, with most emails reaching the inbox or promotions tab. Spam rates were low, but slightly higher than ActiveCampaign and HubSpot.
Key Insight: Mailchimp is reliable for newsletters and regular campaigns but may place emails in the promotions tab more often.
ActiveCampaign Deliverability Results
ActiveCampaign had the best performance in our email deliverability test results. It had the highest inbox placement rate and the lowest spam rate among the platforms tested.
Key Insight: ActiveCampaign is one of the best platforms if deliverability is your top priority.
Brevo Deliverability Results
Brevo performed slightly lower in our email deliverability test results, but still within a good range. Some emails landed in spam, especially when authentication was not fully configured.
Key Insight: Proper authentication setup is very important when using Brevo.
GetResponse Deliverability Results
GetResponse performed consistently in our email deliverability test results, with good inbox placement and low spam rates.
Key Insight: GetResponse is a reliable platform for general email marketing campaigns.
Key Factors That Affect Deliverability
Our email deliverability test results showed that deliverability is not only dependent on the platform. Several factors affect whether your email lands in the inbox:
1. Email Authentication
Setting up SPF, DKIM, and DMARC improves deliverability. Platforms with guided authentication setup performed better in our email deliverability test results.
2. Email List Quality
Sending emails to inactive or invalid addresses increases spam rates. Clean lists improved our email deliverability test results significantly.
3. Email Content
Emails with too many links, spam trigger words, or large images were more likely to go to spam in our email deliverability test results.
4. Sending Frequency
Sending too many emails in a short period can reduce deliverability. Consistent sending schedules improved our email deliverability test results.
5. Domain Reputation
New domains had lower inbox placement at first, but improved over time in our email deliverability test results.
What These Results Mean for Your Business
These email deliverability test results show that choosing the right platform matters, but your email practices also play a major role in deliverability success.
If your business relies heavily on email marketing, reviewing email deliverability test results before choosing a platform can save you time and money. A platform with high deliverability means more people see your emails, which leads to higher engagement and more conversions.
Based on our email deliverability test results, ActiveCampaign and HubSpot are strong choices for deliverability, while Mailchimp and GetResponse provide balanced performance. Brevo is a good budget option but requires proper setup.
Final Thoughts on Email Deliverability Test Results
Deliverability is one of the most important factors in email marketing success. Even the best-designed email campaign will fail if it does not reach the inbox. That is why reviewing email deliverability test results is essential when choosing an email marketing platform.
Our email deliverability test results showed that all five platforms performed well overall, but some platforms had slightly better inbox placement than others. The most important takeaway from these email deliverability test results is that platform choice, authentication, email list quality, and sending behavior all affect deliverability.
At Massmailmatters.com, we believe that if you want to improve your email marketing performance, start by reviewing email deliverability test results, choosing a reliable platform, and following deliverability best practices. Businesses that pay attention to email deliverability test results are more likely to achieve higher open rates, better engagement, and stronger email marketing results.