• G2 SUMMER 2026 • EMAIL DELIVERABILITY
Inbox Monster vs Litmus
Inbox Monster helps email teams send with confidence with deliverability and testing tools. See how Inbox Monster compares to other testing tools out there, based on a third-party report.
Inbox Monster
/5
48 reviews on G2
Best Relationship - Enterprise
Best Support - Enterprise
Easiest to Do Business With - Enterprise
Litmus
/5
446 reviews on G2
Acquired by Validity (2025)
Enterprise Relationship Index: Satisfaction scores
Inbox Monster
Litmus
Overall Relationship
Inbox Monster scores 87%
Litmus scores 79%
Litmus scores 79%
Ease of Doing Business
Inbox Monster scores 100%
Litmus scores 95%
Litmus scores 95%
Likelihood to Recommend
Inbox Monster scores 99%
Litmus scores 92%
Litmus scores 92%
Quality of Support
Inbox Monster scores 99%
Litmus scores 91%
Litmus scores 91%
Badges Earned
Inbox Monster earns 3
Three Enterprise Badges for Summer 2026
All awards are enterprise-tier recognitions, the highest category on G2. They are based on an independent comparison based on verified G2 Summer 2026 data across results, ROl and user satisfaction.
Feature and criteria comparison
Inbox Monster
Litmus
G2 Star Rating
4.9★
4.6★
Results Score
86% (+7 vs avg)
79% avg
Likelihood to Recommend
99% (+11 vs avg)
88% avg
Meets Requirements
97% (+7 vs avg)
90% avg
User Adoption
83% (+18 vs avg)
65% avg
Best Relationship — Enterprise
Best Support — Enterprise
Easiest to Do Business With - Enterprise
* Inbox Monster G2 metrics verified from G2 Summer 2026 report · Category averages from G2 Summer 2026
inboxmonster.com · litmus.com · g2.com
