Side-by-side comparison · 24 data points
Send hundreds of personalized emails from Google Sheets ™. Includes: mail merge, tracking, scheduling, follow-ups, automations and powerful AI features. Try it now, it's free!
| Mailmeteor | Slemma | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
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| Listed | — | — |
| Last updated | — | — |
| Metric | Mailmeteor: Mail merge for Google Sheets ™ | Slemma |
|---|---|---|
| Rating | ★ 4.9 ★ | 3.7 ★ |
| Total reviews | ★ 12k | 92 |
| Active installs | 7,914,158+ | 1,748,183+ |
| Free plan | ★ Yes | — |
| Pricing | Free of charge with paid features | Not available |
| Built for Shopify | — | — |
| Featured placements | 4 | — |
Based on the data on this page, Mailmeteor: Mail merge for Google Sheets ™ is the stronger choice for most Google Workspace Marketplace merchants — 4.9★ vs Slemma's 3.7★ is a meaningful gap that usually reflects real product or support quality differences across the user base. On pricing, Mailmeteor: Mail merge for Google Sheets ™ offers a free tier (Free of charge with paid features) while Slemma starts at Not available. For early-stage stores or merchants validating fit, the free-tier path lets you run the app on real orders before committing budget. Mailmeteor: Mail merge for Google Sheets ™ has the larger user base (11,687 reviews vs 92), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Slemma's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat. Recommended by store size: small/early-stage merchants who need fast install and low risk should default to Mailmeteor: Mail merge for Google Sheets ™; mid-market and enterprise merchants with specific feature requirements should evaluate both — Slemma's 92-review base may include the workflow context that matches your specific use case better than Mailmeteor: Mail merge for Google Sheets ™'s broader-but-shallower coverage. This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Google Workspace Marketplace listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Mailmeteor: Mail merge for Google Sheets ™ audit • Slemma audit
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Mailmeteor: Mail merge for Google Sheets ™ is the cheaper option — it offers a free plan (Free of charge with paid features). Slemma starts at Not available. Both publish their pricing on the Google Workspace Marketplace marketplace; AppRanks mirrors what's listed on each refresh cycle.
Mailmeteor: Mail merge for Google Sheets ™ has the higher average rating (4.9★ from 11,687 reviews) compared to Slemma (3.7★ from 92 reviews). Both are tracked daily by AppRanks, so the figures here update each refresh cycle.
It depends on what you're optimizing for. Mailmeteor: Mail merge for Google Sheets ™ fits better if you prioritize rating consistency; Slemma is the call if you need the larger user base. Read both apps' detail pages on AppRanks for the full feature breakdown, install counts, and recent listing changes.
Both apps are one-click installs from the Google Workspace Marketplace marketplace. Mailmeteor: Mail merge for Google Sheets ™ has more onboarding documentation maturity (11,687 reviews vs 92), which usually translates to better-tested setup wizards and quicker time-to-value. AppRanks doesn't measure setup time directly — read the recent reviews on each app's detail page for merchant-reported install experience.
Mailmeteor: Mail merge for Google Sheets ™ typically suits established stores with steady traffic based on its review-base composition (11,687 reviews). Slemma aligns more with early-stage and growth-mode stores (92 reviews). Larger review bases generally mean the app has been load-tested at scale — relevant if you're processing high order volume or handling enterprise compliance requirements.
Migration support varies by app and category. Mailmeteor: Mail merge for Google Sheets ™ and Slemma both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Slemma" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.