Outlook Calendar vs Klaviyo

Based on the data on this page, Outlook Calendar is the stronger choice for most HubSpot App Marketplace teams — 3.4★ vs Klaviyo's 0.0★ is a meaningful gap that usually reflects real product or support quality differences across the user base.

Pricing differs significantly: Outlook Calendar at From $5/mo vs Klaviyo at From $29/mo (Klaviyo is roughly 5.8x the entry-tier cost of Outlook Calendar). The pricier tier typically signals deeper feature coverage or higher capacity ceilings; confirm the gap matches your actual feature requirements before treating cost as the deciding factor.

Outlook Calendar has the larger user base (1,545 reviews vs 0), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Klaviyo's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat.

Recommended by size: small/early-stage teams who need fast install and low risk should default to Outlook Calendar; mid-market and enterprise teams with specific feature requirements should evaluate both — Klaviyo's 0-review base may include the workflow context that matches your specific use case better than Outlook Calendar'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 HubSpot App 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.

Is Klaviyo or Outlook Calendar cheaper?

Both Klaviyo and Outlook Calendar offer paid plans only. Klaviyo starts at From $29/mo; Outlook Calendar starts at From $5/mo. Compare the per-tier features in the Pricing section above before committing.

Should I choose Klaviyo or Outlook Calendar?

AppRanks cannot separate these two on rating, because neither publishes one. Outlook Calendar does carry the larger published review base (1,545 vs 0). Read both apps' detail pages for the feature breakdown and recent listing changes.

Which is faster to set up, Klaviyo or Outlook Calendar?

Both apps are one-click installs from the HubSpot App Marketplace. Outlook Calendar has the deeper published review base (1,545 vs 0), which often — though not always — accompanies better-tested setup docs. AppRanks doesn't measure setup time directly: read the recent reviews on each app's detail page for user-reported install experience.

Which works better for small vs large HubSpot App Marketplace teams?

Klaviyo typically suits early-stage and growth-mode teams based on its published review base (0 reviews). Outlook Calendar typically suits early-stage and growth-mode teams based on its published review base (1,545 reviews). A larger review base generally means the app has been exercised at scale — relevant if you are processing high volume or handling enterprise compliance requirements.

Can I migrate data between Klaviyo and Outlook Calendar?

Migration support varies by app and category. Klaviyo and Outlook Calendar 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 Klaviyo" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.