Top Chrome Extensions for Gmail Mail Merge
Gmail Mail Merge Chrome extensions — 9K monthly searches · Rankings shifted 49× in 7 days · Top 3 partially locked by Mail Merge for Gmail - Mailmeteor, GMass: Powerful mail merge for Gmail
What Developers Can Learn
Intelligence derived from tracked keywords across all Gmail Mail Merge sub-keywords
Most Congested
The market is dominated by GMass with 400K users and a 4.8 rating alongside Mailmeteor at 50K users and 4.8 rating.
A concentration ratio of 0.909 signals extreme market concentration where the top two players control most usage.
An unrated clone extension at 10K users with a 2.7 rating shows low-quality copies struggle to gain traction, while the 4.4 average top-5 rating sets a high bar for new entrants.
Possible Openings
Adjacent keywords like Email Tracking Gmail (14.8K searches), Gmail Email Tracker (14.3K searches), and Gmail Dark Mode (11.3K searches) show strong demand with likely lower competition than the mail merge space.
Positioning Patterns
Top performers follow naming patterns like 'Mail Merge for Gmail' with brand names appended.
GMass differentiates with 'Powerful' in its title and claims the highest user count.
High ratings (4.8) and professional branding characterize the top tier, with clear feature descriptions in extension names.
Top Extensions Leaderboard
7-day ranking snapshot and appearances in Top 10
| # | Extension | Users | Rating | Appearances | Category | Momentum |
|---|---|---|---|---|---|---|
| 1 |  Mail Merge for Gmail - Mailmeteor | 50,000+ | ⭐ 4.8 | 7/7d | Gmail | ↑ rising |
| 2 |  Mail Merge for Gmail | 10,000+ | ⭐ 2.7 | 7/7d | Gmail | ↓ dropping |
| 3 |  GMass: Powerful mail merge for Gmail | 400,000+ | ⭐ 4.8 | 7/7d | Gmail | ↑ rising |
| 4 |  Mail Merge for Gmail & Mass Email Sender - EmailMassa | 94 | ⭐ 5 | 7/7d | Gmail | — stable |
| 5 |  Streak Mail Merge for Gmail | 10,000+ | ⭐ 4.8 | 7/7d | Gmail | ↑ rising |
| 6 |  MassMerge: Latest mail merge for Gmail | 5,000+ | ⭐ 4.6 | 7/7d | Gmail | ↑ rising |
| 7 |  MergeMail | 30,000+ | ⭐ 4.9 | 7/7d | Gmail | — stable |
| 8 |  Salesforza Gmail Mail Merge & CRM on GSheets | 795 | ⭐ 4.6 | 7/7d | Gmail | ↑ rising |
| 9 |  FullMail: Smart Mail Merge Inside Gmail | 17 | ⭐ 0 | 6/7d | Gmail | — stable |
| 10 |  EZMailer: Mail Merge for Gmail & Bulk Email Sender | 33 | ⭐ 5 | 7/7d | Gmail | — stable |
Mail Merge for Gmail - Mailmeteor
50,000+ · ⭐ 4.8 · 7/7d
Mail Merge for Gmail
10,000+ · ⭐ 2.7 · 7/7d
GMass: Powerful mail merge for Gmail
400,000+ · ⭐ 4.8 · 7/7d
Mail Merge for Gmail & Mass Email Sender - EmailMassa
94 · ⭐ 5 · 7/7d
Streak Mail Merge for Gmail
10,000+ · ⭐ 4.8 · 7/7d
MassMerge: Latest mail merge for Gmail
5,000+ · ⭐ 4.6 · 7/7d
MergeMail
30,000+ · ⭐ 4.9 · 7/7d
Salesforza Gmail Mail Merge & CRM on GSheets
795 · ⭐ 4.6 · 7/7d
FullMail: Smart Mail Merge Inside Gmail
17 · ⭐ 0 · 6/7d
EZMailer: Mail Merge for Gmail & Bulk Email Sender
33 · ⭐ 5 · 7/7d
Ranking Volatility - Top 10 Ranks
7-day Top 10 movement snapshot (2026-07-14 to 2026-07-20)
✦ Entered Top 10 This Week
↓ Dropped Out of Top 10
Data Methodology
- Data source:
- Chrome Web Store search results
- Update frequency:
- Weekly
- Monthly Search Demand:
- Estimated demand indicator sourced from third-party keyword data. Not CWS-internal figures.