Templates

Liquid

Safe template language created by Shopify.

See alternatives ↗ Visit shopify.github.io ↗

overview

Liquid is an open-source template language created by Shopify and used in Shopify themes, Jekyll, and many hosted applications. Its main fit for email is safe user-editable templates, stored templates, and commerce-style dynamic content.

for SaaS product teams

A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.

Against trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, Liquid covers none of the capabilities this audience leans on (multi-tenant support, event stream, the suppressions API, scheduling, and webhook coverage), so it fits only where those needs are genuinely absent.

Multi-tenant: No
Event stream: No
Suppressions API: No
Operating since: Not published
Scheduling: No
Best published rate per 1,000: Tiers not published in comparable form
Deliverability: Not applicable; template language only.
Webhooks: No
Starts at: Free

deliverability

Not applicable; template language only.

best for

Products that need safe, user-editable email templates or Shopify-adjacent personalization.

not great for

Teams that want a full responsive email design system out of the box.

pros

› Designed for safe customer-facing template editing
› Strong fit for stored templates and ecommerce-style personalization
› MIT-licensed and well documented

cons

› No email layout framework or rendering compatibility layer by itself
› Many real-world Liquid variants differ from core Liquid behavior
› Ruby-first official implementation may not match every stack preference

Features at a glance

API	No
SMTP	No
SDKs	ruby
Webhooks	No
Templates	basic
React Email	No
Batch send	No
Scheduled send	No
Suppressions	No
Multi-tenant	No
Inbound parsing	No
Event stream	No
Idempotency keys	No
Dedicated IP	No

Appears in rankings

#06 →

6 Best Email Template Engines (2026), Tested

Best fit for safe user-editable templates and commerce-style personalization, not responsive layout by itself.

#12 →

12 Best Open-Source Email Tools (2026), Tested

Safe user-editable template language with strong commerce adoption.