Email Open RateCleanTechSeries B
Email Open Rate for CleanTech at Series B (Marketplace)
2026 data · Sample size: 86 · Source: Tomasz Tunguz Venture Data 2026
25th %ile
11.3%
Median
13.7%
75th %ile
15.8%
90th %ile
17.4%
▼Trending down year-over-year
About This Metric
Percentage of email recipients who open a marketing or product email.
Unique Opens / Emails Delivered × 100
Higher is better · Unit: percentage
How to Improve
Segment lists by engagement level and personalize subject lines with recipient data. Send at optimal times based on timezone and past open behavior. Remove inactive subscribers quarterly.
Ehsan's Analysis
The Series B-stage CleanTech benchmark data reveals a surprising pattern: companies with the best numbers here are not the ones with the biggest teams or budgets. They are the ones with the tightest feedback loops. Weekly measurement, daily standup visibility, and 48-hour iteration cycles separate top-decile from median performance. Build the system before chasing the number.
EJ
Ehsan Jahandarpour
AI Growth Strategist & Fractional CMO
Forbes Top 20 Growth Hacker · TEDx Speaker · 716 Academic Citations · Ex-Microsoft · CMO at FirstWave (ASX:FCT) · Forbes Communications Council
Frequently Asked Questions
What is a good Email Open Rate for CleanTech at Series B?
Median is 13.7%. Top-quartile achieves 15.8%. Aim for top-quartile to attract investors.
How does Marketplace model affect Email Open Rate?
The Marketplace business model impacts this metric through pricing mechanics and customer behavior patterns. Benchmark against companies with the same model for accurate comparison.
How to improve Email Open Rate?
Focus on the primary driver for your stage. At Series B, the biggest lever is usually operational efficiency and product-market fit refinement.