Choose Klaviyo if you need
- API. We haven't found it on Postcards' website.
- Integration with Shopify. We haven't found it on Postcards' website.
- SOC 2 or GDPR. We haven't found them on Postcards' website.
At a glance
- Both have a free plan.
- Postcards' lowest paid plan is Plus at $16 per month, as of November 14, 2026.
- Only Klaviyo lists API.
- Only Postcards lists Web.
- They list no integrations in common.
- Only Klaviyo lists SOC 2 and GDPR.
- Only Postcards lists SSO.
- Both have a public API.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Postcards if you need
- Web. We haven't found it on Klaviyo's website.
- Integration with Mailchimp, HubSpot or Klaviyo. We haven't found them on Klaviyo's website.
- SSO. We haven't found it on Klaviyo's website.
Klaviyo
Nobody has reviewed Klaviyo yet. Its rating shows once it has 3 reviews.
Review Klaviyo
Postcards
Nobody has reviewed Postcards yet. Its rating shows once it has 3 reviews.
Review PostcardsThe facts
- What it does
- KlaviyoAI-first B2C CRM that unifies marketing and service across email, SMS, WhatsApp and more
- PostcardsAn email builder for HTML emails with a drag-and-drop editor, templates, AI generation and one-click export.
- Free plan
- KlaviyoYes
- PostcardsYes
- Pricing
- KlaviyoNot confirmed
- PostcardsNot confirmed
- Paid plans from
What they share
From the platforms and integrations each website lists.
Platforms
BothNone in common
Only Klaviyo
- API
Only Postcards
- Web
Integrations
BothNone in common
Only Klaviyo
- Shopify
Only Postcards
- Mailchimp
- HubSpot
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Klaviyo and Postcards yet.
Used either of them?
Your review makes this comparison better for the next person. Review Klaviyo or review Postcards.