Subscription auto-ship for diapers, formula, wipes, baby food, ReCharge vs Bold vs Skio vs Smartrr?

All four integrate with Magento. Differences for baby-DTC specifically:

• ReCharge, the default. Largest install base, deepest Magento integration. Stage-graduation logic (newborn → size 1 at week 8) is configurable via custom code on top. Pricing: $0.40 per processed sub + 1% transaction fee, starts at $99/mo. Best for brands at $500k, $10M sub revenue.
• Bold Subscriptions, Magento-native (no separate checkout). Cheaper at scale. Smaller ecosystem. Best for brands that want sub checkout to stay inside Magento.
• Skio, newer, founder-led, strong on portal UX and skip / pause / swap controls. Recently shipped a graduation-by-birthdate feature specifically aimed at baby + pet. Pricing: 0.5%, 1% of sub revenue, no per-sub fee. Best for $1M, $10M brands prioritizing customer self-serve.
• Smartrr, premium tier. Best-in-class portal, member-perks layer, native referral, integration with Klaviyo / Postscript for milestone messaging. $499, $1,999/mo. Best for $5M+ brands where portal experience is a moat.

The baby-specific feature that matters: stage graduation. A newborn diaper sub needs to auto-bump to size 1 at ~week 8, size 1 → size 2 at month 4, etc. Same for formula stage 1 → 2 → 3. All four can do this; ReCharge needs custom code, Smartrr ships it native, Skio has a beta feature.

Klaviyo flow that pairs with the sub: “you’ll run out of size 2 in 9 days” (winback when a sub is paused), milestone-based stage upsell (8 weeks before birthdate + 12mo → potty-training landing page). The integration is what holds churn under 6%/mo, the LTV math (~$2,400 on diapers over 18 months) only works at that churn level.