Klaviyo vs HubSpot Marketing Hub

These are research observations, not timing or usability test results. Implementation depends on catalog, data migration, design, channels, integrations, internal skills, and partner scope.

Klaviyo

Email, SMS, MMS, WhatsApp, RCS and mobile push from one profile, plus 350+ integrations and paid add-ons such as Composer, Customer Hub, social marketing and reviews.

HubSpot Marketing Hub

Marketing, Sales, Service, Content, Data and Revenue Hubs on one CRM, with HubSpot Credits for AI features. SMS is a paid add-on on Professional and Enterprise for US accounts.

Klaviyo: Free for up to 250 active profiles and 500 email sends a month, with $5 of mobile messages. The Email plan is priced by active profiles: $20/month at 500, $100/month at 5,000 (50,000 emails a month) and $400/month at 25,000 (250,000 emails a month). Self-serve plans bill monthly. SMS is a separate monthly dollar plan. Checked Oct 10, 2026.

HubSpot Marketing Hub: Free for up to 2 users. Starter lists at $20/month per seat with 1,000 marketing contacts, then $50, $45 and $40 per extra 1,000 by tier. Professional is $890/month paid monthly or $800/month paid annually, with 3 core seats and 2,000 marketing contacts, then $250 per 5,000 up to 22,000. Enterprise starts at $3,600/month. Checked Oct 10, 2026.

Editorial calculation from each vendor's pricing page, calculator and help docs, Oct 10, 2026. HubSpot Starter figures use the $20 list seat price, not the limited-time offer for new customers. HubSpot Professional uses the pay-monthly price on an annual commitment. Excludes taxes, SMS and add-ons.

Build a scenario-based total-cost model. Include implementation, ongoing labor, extensions, communications or payments, support, and migration—not only the published base price.

A store emailing 5,000 or 25,000 subscribers, with no SMS. On Klaviyo that is the Email plan. On HubSpot we show Starter, the closest entry tier, and Professional, the tier that adds unlimited automation and Shopify cart emails. Every contact is counted as a marketing contact on HubSpot.

List prices from each vendor's pricing page and calculator, checked Oct 10, 2026. Klaviyo: Email plan at 5,000 and 25,000 active profiles, × 12 for year one. HubSpot Starter: one $20 seat plus extra marketing contacts above the included 1,000. At 5,000: 2 × $50 + 2 × $45 = $190. At 25,000: 2 × $50 + 2 × $45 + 20 × $40 = $990. HubSpot Professional: $890 pay-monthly price with 3 seats and 2,000 contacts, plus 5,000-contact packs. At 5,000: one pack at $250. At 25,000: 4 × $250 + 1 × $225 = $1,225. Year one adds the required $3,000 onboarding: $1,140 × 12 + $3,000 = $16,680, and $2,115 × 12 + $3,000 = $28,380. Paying Professional annually lists at $800/month before contacts. Excludes taxes, SMS and add-ons.

What decides it. For email alone, Klaviyo's Email plan listed lower than both HubSpot tiers at both volumes. HubSpot's gap narrows when many contacts can stay non-marketing, because those are free. It also matters if the store already pays for HubSpot seats for sales or service. Check which tier you need for Shopify cart emails before comparing totals. HubSpot lists that feature on Professional and Enterprise only.

Annual lock-in on HubSpot Professional. HubSpot's help center says Starter can be a monthly or annual commitment, but Professional and Enterprise must be annual. You can pay monthly inside that term. You cannot cancel before the term ends, and auto-renewal is on by default.

HubSpot contact tiers move one way mid-term. If you go over your marketing contacts tier, HubSpot bills you immediately. Your contact tier cannot be downgraded until the contract renewal date. Changing contacts to non-marketing only takes effect at the start of the next month or the renewal date.

Klaviyo moves you up automatically. Klaviyo bills self-serve plans monthly. If active profiles grow past your plan, Klaviyo moves you to a plan that covers them at the next billing cycle. Downgrades are not automatic, mid-cycle downgrades are not refunded, and a downgrade has to be made more than 24 hours before the cycle renews. Klaviyo counts any profile that can be emailed, whatever its consent status. Suppressing unengaged profiles is how you lower the count.

Onboarding fees. HubSpot lists a required one-time onboarding fee of $3,000 for Marketing Hub Professional and $7,000 for Enterprise. Klaviyo says it charges no hidden fees and offers optional paid professional services for larger projects.

Klaviyo on Shopify. Klaviyo's integration syncs events such as Placed Order, Ordered Product, Fulfilled Order, Checkout Started, Added to Cart and Viewed Product. It can also sync Shopify email subscribers into a Klaviyo list. Optional settings push profile details, consent status and custom properties back to Shopify as metafields. Klaviyo's Shopify App Store listing names Shopify Flow, checkout and customer accounts among the things it works with.

HubSpot on Shopify. HubSpot's Shopify data sync app is free to install on any plan. It syncs contacts and products both ways, and orders and abandoned checkouts one way into HubSpot. Company sync needs Shopify Plus. Custom field mappings need at least Data Hub Starter. HubSpot says Shopify metafields and product variants don't sync through this app. Using cart data in marketing emails requires Marketing Hub Professional or Enterprise.

SMS. Klaviyo sells SMS, MMS and other mobile messages as a monthly dollar plan. It says per-message rates include carrier fees and unused spend doesn't roll over. Klaviyo recommends a short code, at extra cost, above 95,000 recipients a month. HubSpot's Marketing SMS add-on is for Professional and Enterprise, US accounts only. It is $75/month for a 10DLC number and 1,000 message segments, plus $15/month per extra 1,000 segments. A short code add-on is $1,500/month on Enterprise.

• Count how many of your contacts would be HubSpot marketing contacts, then price both tiers on HubSpot's calculator.
• Check your Klaviyo active profile count after suppressing unengaged profiles, and price the plan that covers it.
• Connect a Shopify development store to both and confirm order, checkout and product data arrive as expected.
• Build the same abandoned checkout flow in each and note which HubSpot tier it needs.
• Ask HubSpot sales to confirm term length, auto-renewal and onboarding fees in writing on the order form.

BestStorefront does not name a winner. Run these checks against your own catalog and volumes.