Top Chrome Extensions for Gmail Mail Merge
Gmail Mail Merge Chrome extensions — 9K monthly searches · Rankings shifted 45× in 7 days · Top 3 partially locked by Mail Merge for Gmail, GMass: Powerful mail merge for Gmail
What Developers Can Learn
Intelligence derived from tracked keywords across all Gmail Mail Merge sub-keywords
Most Congested
GMass dominates with 400K users and a 4.8 rating, making it 40x larger than the next closest competitor.
The concentration ratio of 0.838 signals extreme market consolidation.
New entrants face a high quality bar (avg top 5 rating: 4.3) and must differentiate beyond basic mail merge functionality to gain traction.
Possible Openings
Email tracking keywords like 'Email Tracking Gmail' (14.8K) and 'Gmail Email Tracker' (14.3K) offer similar search volumes with potentially lower competition than mail merge.
These adjacent keywords focus on visibility and analytics rather than sending volume, appealing to users at different stages of the email workflow.
Positioning Patterns
Top performers combine 'mail merge' with 'Gmail' in their names for clarity.
GMass leverages descriptive power ('Powerful') while Streak emphasizes its parent brand ecosystem.
Quality matters: 2.7-rated extensions hover at 10K users while 4.8-rated competitors achieve either dominance (GMass) or stable niches (Streak).
Top Extensions Leaderboard
7-day ranking snapshot and appearances in Top 10
| # | Extension | Users | Rating | Appearances | Category | Momentum |
|---|---|---|---|---|---|---|
| 1 |  Mail Merge for Gmail | 10,000+ | ⭐ 2.7 | 7/7d | Gmail | — stable |
| 2 |  GMass: Powerful mail merge for Gmail | 400,000+ | ⭐ 4.8 | 7/7d | Gmail | — stable |
| 3 |  Streak Mail Merge for Gmail | 10,000+ | ⭐ 4.8 | 7/7d | Gmail | ↑ rising |
| 4 |  Salesforza Gmail Mail Merge & CRM on GSheets | 801 | ⭐ 4.6 | 7/7d | Gmail | ↓ dropping |
| 5 |  MassMerge: Latest mail merge for Gmail | 345 | ⭐ 4.6 | 7/7d | Gmail | ↓ dropping |
| 6 |  MergeMail | 30,000+ | ⭐ 4.9 | 7/7d | Gmail | ↑ rising |
| 7 |  FullMail: Smart Mail Merge Inside Gmail | 19 | ⭐ 0 | 7/7d | Gmail | — stable |
| 8 |  Gmail AI Email Assistant - Mailmeteor | 50,000+ | ⭐ 4.7 | 7/7d | Gmail | ↓ dropping |
| 9 |  Inbox Enhance - mail merge, mass email, email tracking and notes for Gmail | 88 | ⭐ 3.5 | 7/7d | Gmail | ↑ rising |
| 10 |  Mail Merge for Gmail Aeroleads | 14 | ⭐ 1 | 7/7d | Gmail | ↑ rising |
Mail Merge for Gmail
10,000+ · ⭐ 2.7 · 7/7d
GMass: Powerful mail merge for Gmail
400,000+ · ⭐ 4.8 · 7/7d
Streak Mail Merge for Gmail
10,000+ · ⭐ 4.8 · 7/7d
Salesforza Gmail Mail Merge & CRM on GSheets
801 · ⭐ 4.6 · 7/7d
MassMerge: Latest mail merge for Gmail
345 · ⭐ 4.6 · 7/7d
MergeMail
30,000+ · ⭐ 4.9 · 7/7d
FullMail: Smart Mail Merge Inside Gmail
19 · ⭐ 0 · 7/7d
Gmail AI Email Assistant - Mailmeteor
50,000+ · ⭐ 4.7 · 7/7d
Inbox Enhance - mail merge, mass email, email tracking and notes for Gmail
88 · ⭐ 3.5 · 7/7d
Mail Merge for Gmail Aeroleads
14 · ⭐ 1 · 7/7d
Ranking Volatility - Top 10 Ranks
7-day Top 10 movement snapshot (2026-03-31 to 2026-04-06)
✦ 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.
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