Klaviyo
Ecommerce-focused marketing automation.
Klaviyo dominates Shopify-shaped ecommerce email and SMS. Deep integrations with storefronts, predictive analytics, and template builder. Less developer-centric than Customer.io, but the data model is rich.
At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.
Against a waitlist, a launch announcement, onboarding email, and the first transactional sends, Klaviyo covers developer experience, scheduling, SDK breadth, and webhook coverage, and does not cover operating track record. Whether that gap matters depends on how central those are to the build.
- Free tier: 500 emails to 250 contacts
- Best published rate per 1,000: Tiers not published in comparable form
- Starts at: $45/mo for 5,000 emails
- DX score: 6/10
- Deliverability: Solid for ecommerce traffic.
- Operating since: 2012
- Scheduling: Yes
- SDKs: node, python, php, ruby
- Webhooks: Yes
Solid for ecommerce traffic.
Shopify and ecommerce teams.
- › Ecommerce integrations are deep
- › Predictive analytics
- › Weak for non-ecommerce use cases
- › Pricing climbs fast with contact growth
Features at a glance
| API | Yes |
| SMTP | No |
| SDKs | node, python, php, ruby |
| Webhooks | Yes |
| Templates | rich |
| React Email | No |
| Batch send | Yes |
| Scheduled send | Yes |
| Suppressions | Yes |
| Multi-tenant | No |
| Inbound parsing | No |
| Event stream | Yes |
| Idempotency keys | No |
| Dedicated IP | Yes |