Side-by-side comparison · 24 data points
FosterFlow: email & popup automation. Boost sales with personalized, high-deliverability campaigns
| FosterFlow | Klaviyo | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
| Listed |
| Metric | FosterFlow Email Marketing | Klaviyo: Email Marketing & SMS |
|---|---|---|
| Rating | ★ 5.0 ★ | 4.7 ★ |
| Total reviews | 4 | ★ 3k |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free to install |
| Built for Shopify | — | — |
| Pricing tiers | ★ 4 tiers | 3 tiers |
| Listed features | 5 | 5 |
| Featured placements | — | 4 |
| Review velocity (30d) | — | 123 new |
| Languages | 1 supported | 10 supported |
| Listed since | Sep 2025 | Sep 2012 |
FosterFlow Email Marketing edges out Klaviyo: Email Marketing & SMS on rating (5.0★ vs 4.7★), but the gap is small enough that pricing fit and feature differentiation should drive the decision more than the headline number. Pricing entry tiers: FosterFlow Email Marketing at Free plan available, Klaviyo: Email Marketing & SMS at Free to install. Check each app's tier structure for the capacity limits you actually need before deciding — the headline number is the same shape, but the gating shape per tier (apps, orders, integrations) varies. Klaviyo: Email Marketing & SMS has the larger user base (2,989 reviews vs 4), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. FosterFlow Email Marketing'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 FosterFlow Email Marketing; mid-market and enterprise merchants with specific feature requirements should evaluate both — Klaviyo: Email Marketing & SMS's 2,989-review base may include the workflow context that matches your specific use case better than FosterFlow Email Marketing'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 Shopify App Store 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: FosterFlow Email Marketing audit • Klaviyo: Email Marketing & SMS audit
| Last updated | — | — |
|---|
| Keyword | FosterFlow | Klaviyo |
|---|---|---|
| #67 | #2 | |
| grow faster | #180 | #1 |
Not featured in any section recently.
No tracked changes.
| Signal | FosterFlow | Klaviyo |
|---|---|---|
| Average rating | 5.0 ★ (4) | 4.7 ★ (3k) |
| Rating distribution | 5— 4— 3— 2— 1— | 590% 42% 30% 21% 17% |
| Reviews · last 7 days | — | +22 |
| Reviews · last 30 days | — | +123 |
| Reviews · last 90 days | — | +451 |
No reviews yet.
Both FosterFlow Email Marketing and Klaviyo: Email Marketing & SMS offer paid plans only. FosterFlow Email Marketing starts at Free plan available; Klaviyo: Email Marketing & SMS starts at Free to install. Compare the per-tier features in the Pricing section above before committing.
FosterFlow Email Marketing has the higher average rating (5.0★ from 4 reviews) compared to Klaviyo: Email Marketing & SMS (4.7★ from 2,989 reviews). Both are tracked daily by AppRanks, so the figures here update each refresh cycle.
It depends on what you're optimizing for. FosterFlow Email Marketing fits better if you prioritize rating consistency; Klaviyo: Email Marketing & SMS 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 Shopify App Store marketplace. Klaviyo: Email Marketing & SMS has more onboarding documentation maturity (2,989 reviews vs 4), 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.
FosterFlow Email Marketing typically suits early-stage and growth-mode stores based on its review-base composition (4 reviews). Klaviyo: Email Marketing & SMS aligns more with early-stage and growth-mode stores (2,989 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.
Good tool for email marketing, syncs well with Shopify. Segmentation takes a bit of learning but works well once set up.
Migration support varies by app and category. FosterFlow Email Marketing and Klaviyo: Email Marketing & SMS 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 FosterFlow Email Marketing" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
