WorkflowMail Emails vs FlowRelay: Webhooks to Flow
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for WorkflowMail Emails, Oct 14, 2026 for FlowRelay.
The short answer
- Both list a free plan. Paid plans start at $9.99/month for WorkflowMail Emails and $29/month for FlowRelay.
- FlowRelay lists 4 features WorkflowMail Emails’s listing doesn’t mention, including APIs, Custom triggers, Inventory levels.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · SMTP not required
- · no priority in queue
- · standard email template
- · up to 500 lifetime Flow actions free
- · works with dev and production stores
Professional
- · 90 days log retention
- · add static attachments to your emails
- · customize email template's design w HTML
- · send emails from your own email domain
- · standard priority in queue
Advanced
- · 180 days log retention
- · add attachments to your emails from URL
- · add static attachments to your emails
- · customize email template's design w HTML
- · everything in Professional
- · high priority in queue
Enterprise
- · 1:1 expert setup available
- · add attachments to your emails from URL
- · add static attachments to your emails
- · custom email templates coded by our team
- · everything in Advanced
- · top priority in queue
Free/Test
- · 500 accepted events/month
- · Agent Access included (Free/Test limits)
- · Diagnostic shares and replay executions
Starter
- · 25,000 accepted events/month
- · Agent Access included
- · Diagnostic shares and replay executions
Growth
- · 250,000 accepted events/month
- · Agent Access included
- · Diagnostic shares and replay executions
Scale
- · 1,000,000 accepted events/month
- · Agent Access included
- · Diagnostic shares and replay executions
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureUnlock the full potential of Shopify Flow with WorkflowMail. Craft personalized transactional emails effortlessly, leveraging the power of targeted communication. Whether triggering follow-up email, sending order confirmations, downloads links, account validations or other critical business notifications, WorkflowMail ensures your messages are impactful and customer-focused.
FlowRelay turns blind webhook handoffs into visible, auditable receipts for Shopify Flow. Create webhook trigger endpoints for ERP, WMS, CRM, 3PL, app, or script events; authenticate with HMAC-SHA256 or a static header; and see whether each event was accepted, mapped, and handed to Shopify Flow.
- Create Shopify Flow automations resulting in transactional email sending
- Optimized transactional email design
- Customizable email content, sender and reply-to parameters
- Receive webhook events in Shopify Flow
- Protect senders with HMAC or static header secrets
- See accepted, failed, no-workflow, and handoff receipts
- Replay retained events with receipt facts and cautions
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure | WorkflowMail Emails |  FlowRelay |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | WorkflowMail Emails | FlowRelay |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 52 | Not published |
| New reviews, 28 days | 4 | Not enough data |
| Reviewers a year or more in | 9% | Not enough data |
Pricing
| Measure | WorkflowMail Emails | FlowRelay |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $9.99/month(ahead) | $29/month |
| Longest free trial | Not listed | Not listed |
| Plans listed | 4 | 4 |
Listing
| Measure | WorkflowMail Emails | FlowRelay |
|---|---|---|
| Shopify category rank | #3(ahead) | #283 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Feb 8, 2024 | Jun 8, 2026 |
| Languages | 1 | 1 |
| Developer | Intelli-ua | Ordu Labs |
FAQ
WorkflowMail Emails and FlowRelay: common questions
- Is WorkflowMail Emails or FlowRelay cheaper?
- Both list a free plan. Paid plans start at $9.99/month for WorkflowMail Emails and $29/month for FlowRelay. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- WorkflowMail Emails lists 3 the others don’t mention, such as Custom workflows, Email responses, Templates. FlowRelay lists 4 the others don’t mention, such as APIs, Custom triggers, Inventory levels, Order processing. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 4, 2026 for WorkflowMail Emails, Oct 14, 2026 for FlowRelay; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 4, 2026 for WorkflowMail Emails, Oct 14, 2026 for FlowRelay. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.