Use cases
Built for teams that send event-driven email
Whether you are onboarding new users, recovering abandoned carts, or sending transaction alerts — Synapse turns your business events into personalized email sequences.
Turn signups into active users
Your product already tracks signups, feature activations, and trial expirations. Synapse turns those events into automated email sequences that guide users to value — without your engineering team writing or maintaining template code.
Onboarding drip campaigns
Trigger a welcome sequence on signup. Personalize each email based on plan, company size, or signup source.
Trial-to-paid conversion
Send reminders as trial expiration approaches. Include usage data to show value already built.
Feature adoption nudges
Trigger emails when users have not used a key feature within their first week.
Re-engagement sequences
Use flow triggers on inactivity events. Segment by last login date.
Onboarding conditional
{if the user's Plan is premium}
Your premium account is ready. Here are 3 features to try today.
{else}
Welcome to the free plan. Here is how to get the most out of it.
{end if}Trial conversion
You have sent {count of the user's Emails Sent, pluralize "email"} and
activated {count of the user's Features Used, pluralize "feature"} during
your trial.Feature adoption
{if the user's First Flow Created is not set}
You have not created your first flow yet. It takes 5 minutes.
{end if}Cart abandonment
You left these items in your cart:
{for item in the Items from the trigger event, show first 5}
{item.Name} -- {item.Price, as "currency"}
{end for}
Total: {the Cart Value from the trigger event, as "currency"}Product recommendations
{for item in the user's Recommendations, where "category" is "electronics", show first 3}
{item.Name} -- {item.Price, as "currency"}
{end for}Recover carts. Delight buyers.
Cart abandonment, order confirmation, shipping updates, and review requests — e-commerce runs on event-driven email. Synapse lets your marketing team build and personalize these flows without waiting on engineering.
Cart abandonment recovery
Trigger a flow when the cart_abandoned event fires. Include actual items, prices, and cart total.
Post-purchase follow-up
Send confirmations with line items, then follow up with review requests on a timed delay.
Personalized recommendations
Use contact properties to include recommendations based on purchase history.
Win-back campaigns
Segment by last purchase date to target inactive customers with personalized offers.
Send the right alert at the right moment
Financial communications demand accuracy. A half-rendered transaction alert or a missing reference number erodes trust instantly. Synapse's required modifier and strict formatting give your team the precision financial email requires.
Transaction confirmations
Send immediate confirmation when a payment processes. Multi-currency formatting built in.
Balance alerts
Trigger emails when a balance drops below a threshold using numeric operators.
Account activity summaries
Aggregate transaction data in periodic digest emails.
Compliance and audit emails
Every send recorded in the audit trail with timestamps and error details.
Transaction confirmation
Payment confirmed: {the Amount from the trigger event, as "currency VND"}
Reference: {the Reference Number from the trigger event, required}
Date: {the Transaction Date from the trigger event, as "long date"}Balance alert
{if the user's Balance is less than 100}
Your balance is {the user's Balance, as "currency"}.
Top up to avoid service interruption.
{end if}Activity summary
This month you made {count of the user's Transactions, pluralize "transaction"}
totaling {sum of the user's Transaction Amounts, as "currency"}.Seller onboarding
Hi {the user's First Name, or "there"},
Your seller account is ready.
{if the user's Listings Count is 0}
Create your first listing to start selling.
{else}
You have {the user's Listings Count, pluralize "listing"} live.
{end if}Buyer order details
Your order from {the Seller Name from the trigger event}:
{for item in the Items from the trigger event}
{item.Name} by {item.Seller} -- {item.Price, as "currency"}
{end for}Notify buyers and sellers independently
Marketplaces send email to two distinct audiences — buyers and sellers — from the same platform. Synapse's multi-tenant architecture isolates data between tenants, and templates personalize each side independently.
Seller onboarding
Guide new sellers through listing setup and payment configuration with a drip sequence.
Buyer notifications
Order confirmations, shipping updates, and delivery notifications with seller and product data.
Two-sided review prompts
Trigger separate flows for buyer and seller reviews after a transaction completes.
Performance analytics per side
Compare email engagement across buyer vs. seller segments.
Ship email campaigns without the risk
Every template, flow, and segment starts in a fully isolated test environment. Send real emails to verified addresses, iterate until everything is right, then clone your entire workflow to production with one click. No re-creating resources, no missed configurations, no surprises in production.
Design in test mode
Build templates, create flows, define segments — all in an isolated environment with its own contacts, events, and analytics.
Test with real emails
Send actual emails to verified team addresses. Catch rendering issues, broken personalization, and deliverability problems before they reach customers.
Clone to live
One-click clone moves templates, flows, segments, and reports from test to production. Everything transfers exactly as designed.
Iterate without risk
Modify and re-test in the test environment at any time. Live flows continue running undisturbed while you prepare the next version.
Test mode API key
POST /v1/events
X-API-KEY: psk_test_a1b2c3...
# Events go to the test environment.
# Flows, contacts, analytics — all isolated.Live mode API key
POST /v1/events
X-API-KEY: psk_live_a1b2c3...
# Events go to the live environment.
# Production data stays separate from test.Every use case gets these capabilities
Smart Suggester
Marketing writes and edits templates without learning syntax — pick a feature, press Enter
AI template assistant
Synapse Chat writes, validates, and fixes templates in the editor
Visual flow builder
Drag-and-drop flow design with conditions, delays, and branches
19 filters, 17 currencies
Format any data for any audience, any region
Required modifier
Suppress sends when critical data is missing
Test/live isolation
Fully separate environments with one-click clone to production
Dead letter queue
Inspect and diagnose failed deliveries
Custom report builder
Build reports specific to your business metrics
Your business events are already happening. Turn them into emails.
Start free — 2,000 emails/month, 2,000 contacts, no credit card required.