Monitoring Klaviyo flows: what each option actually catches
Klaviyo gives you flow analytics. Deliverability tools give you inbox placement. Inbox-side monitoring gives you arrival confirmation. DIY scripts give you a project. This page lays out what each one is good at, and where each one goes blind for a Klaviyo customer.
The four options
What you can use to keep an eye on Klaviyo flows
Klaviyo's built-in flow analytics
Recipients per step, sends per step, opens, clicks, revenue per recipient. The right tool for understanding campaign performance. Blind to whether the message arrived in the inbox, and blind to a flow that has silently stopped matching new customers at the trigger step.
Deliverability monitoring
Inbox placement testing across mailbox providers. Tracks whether your sending domain and dedicated IP get to inbox versus promotions or spam. Useful when you scale up volume or change a sending domain. Blind to whether a specific Klaviyo flow is firing.
Inbox-side monitoring (Telltide)
A monitored address inside the same flow your customers are in. The monitor watches the inbox for arrival, latency and content drift. Catches silent triggers, segment edits, slow latency creep and template breakage that Klaviyo's analytics report as healthy.
DIY scripts
Send a test through the flow with a script, poll a mailbox via IMAP, alert when it does not arrive. Cheap to build for one flow. Expensive to maintain across thirty flows with per-flow baselines, multi-channel alerts and content-diff alerting.
Side by side
What each option detects for a Klaviyo customer
| Failure mode | Klaviyo analytics | Deliverability tools | Inbox-side (Telltide) | DIY script |
|---|---|---|---|---|
| Welcome flow stops triggering for new signups | No | No | Yes | Yes |
| Abandoned cart segment edit excludes an active cohort | No | No | Yes | Partial |
| Sends recorded as delivered but landing in spam | No | Yes | Yes | Partial |
| Send-to-inbox latency creeps from 30s to 8min | No | No | Yes | Partial |
| Template merge tag silently renders empty | No | No | Yes | No |
| Domain reputation declining at one mailbox provider | No | Yes | Partial | No |
| Flow paused by an admin and never resumed | Partial | No | Yes | Yes |
When to combine them
A reasonable Klaviyo monitoring stack
Most mature email teams running Klaviyo end up with three of the four options live: Klaviyo's own analytics for campaign performance, a deliverability tool for placement signal at scale, and a inbox-side monitor per critical flow for arrival confirmation. DIY scripts tend to get retired as soon as the surface area exceeds three flows.
The combination is additive, not redundant. Klaviyo answers "did the campaign perform". Deliverability answers "is the inbox accepting our mail". Inbox-side answers "did the flow I configured actually fire and arrive". Each one is the wrong tool for the other two questions.
Where Telltide fits
Inbox-side monitoring built for Klaviyo flows
Telltide is the inbox-side layer in the stack above. Add a monitored address to your Klaviyo audience, configure one monitor per critical flow, and Telltide watches the inbox for the messages your customers should be getting. The setup is documented end to end on the Klaviyo monitoring page.
Inbox-side monitoring works the same way regardless of the platform behind the send: Salesforce Marketing Cloud, HubSpot, or anywhere else. The relevant glossary entries are silent send and triggered flow.
FAQ
Common questions
Doesn't Klaviyo already show me what's wrong with my flows?
Klaviyo's flow analytics show recipients who entered, sends that dispatched and downstream open and click metrics. They cannot show whether a customer actually received the email, when it arrived in their inbox, or whether the trigger silently stopped firing for a segment.
What kinds of Klaviyo failures are inbox-side monitors built to catch?
Trigger conditions that quietly stop matching new customers, segment edits that exclude an active cohort, sends that dispatch but never arrive at the inbox, and slow drift in send-to-inbox latency. All of these look healthy in Klaviyo's own dashboard.
Will I still need Klaviyo's analytics if I run Telltide?
Yes. Klaviyo's analytics are the source of truth for campaign-level performance: opens, clicks, conversions, revenue per recipient. Telltide is the source of truth for whether the flow you configured actually arrives in the inbox you configured it for.
Does Telltide replace deliverability tools for Klaviyo?
No. Deliverability tools focus on inbox placement at scale: are your domain and IP getting to inbox versus promotions or spam across mailbox providers. Telltide focuses on whether your specific configured flows fire and arrive. Run both if you can.
From the blog
Klaviyo failure modes, written up
- Your abandoned cart flow broke when you changed your Shopify theme: a textbook case of native analytics showing green while revenue stops.
- How to detect broken merge tags in Klaviyo flows: validation gaps that no Klaviyo-internal tool catches.
- 25 hours of silence: an outage Klaviyo Status did not acknowledge until customers had already noticed.
Add inbox-side monitoring to your Klaviyo stack
One monitor free. Paid plans from $49 USD per month.
Klaviyo is a trademark of Klaviyo, Inc. Telltide is an independent product and is not affiliated with, endorsed by or sponsored by Klaviyo. References to Klaviyo on this page are descriptive, for the purpose of comparing monitoring approaches.