Nameryn
Klaviyo
Ecommerce email and SMS, with Klaviyo AI for subject lines and content. AI-powered tool, with a free plan; runs on web. The stack builder picks it for email marketing.
What it is known for
- Strengths: email, SMS, WhatsApp and push campaigns; Composer agent builds flows from a prompt; customer data platform with real-time segmentation.
- For: B2C brands in retail, ecommerce, restaurants, wellness and enterprise.
- Runs on: web; API; 350+ app integrations.
- Learning curve: the page does not say.
- Works with: Shopify, Salesforce, HubSpot, Stripe, WooCommerce and BigCommerce.
Read on October 9, 2026 from klaviyo.com.
Plans and prices
| Plan | Price | What you get |
|---|---|---|
| Free | Free | 250 profiles, 500 emails a month |
| $20/mo | Estimated for up to 500 active profiles; rises with list size | |
| Marketing | $90/mo | Email and SMS, estimated for up to 500 profiles |
Checked by hand against klaviyo.com/pricing on October 9, 2026; confidence high. Prices are monthly in US dollars unless the row says otherwise; the builder counts the plan it starts on, Email.
When the stack builder picks it
The builder reads each job's rules from the top and takes the first step whose conditions hold and whose plan fits the money left. Klaviyo is named in these steps:
- Email marketing, step 4 of 6, when less than $9 is left for it: the free plan; the step also names MailerLite, Brevo, beehiiv, Kit and Omnisend, and the best score takes it.
- Email marketing, step 5 of 6, when you also ticked online store: Email ($20/mo); the step also names Omnisend, and the best score takes it.
- Email marketing, step 6 of 6, otherwise: Email ($20/mo); the step also names Brevo, MailerLite, ActiveCampaign, Omnisend, Kit and beehiiv, and the best score takes it.
The rules are public in stack-rules.json, and how the stack builder scores explains the tie-break.
Works with
Shopify, WooCommerce and BigCommerce.
Alternatives the same rules name
- MailerLite: Email newsletters and automations with an AI writing assistant. From free.
- Brevo: Email, SMS and automations priced by emails sent. From free.
- beehiiv: Newsletter platform with growth and ad tools built in. From free.
- Kit: Email for creators: newsletters, forms and paid subscriptions. From free.
- Omnisend: Ecommerce email and SMS with Essential and Advanced AI. From free.
- ActiveCampaign: Email marketing and automation with an AI automation builder. From $15/mo.
Signals and what people say
- Hacker News, 30 days to October 9, 2026: 0 stories
Change log
- October 9, 2026: added to the tool list; plans and prices first recorded from klaviyo.com/pricing.
Logo: Nameryn monogram (no free mark on file), CC0 1.0.