Email infrastructure
for SaaS that lives by email.
Trial-to-paid orchestration. Lifecycle on one timeline. Stripe webhooks routed straight to email rules. Your AI agents and your CSMs read the same customer record.
Three vendors. Four dashboards. One angry CSM.
Most SaaS teams end up with a hairball of email tools, each owning a slice of the customer. None of them talk. When something goes wrong, nobody knows whose fault it is.
Your email tools don't know what happens in your product.
Customer.io knows they opened the digest. Postmark knows the receipt was sent. Neither knows they cancelled an hour later.
Different tools, different views of the same customer.
Marketing sees a happy weekly opener. Support sees an angry reply. Finance sees an upcoming renewal. Each is technically right.
Trial-to-paid funnel split across three reports.
Activation in Mixpanel. Email engagement in Customer.io. Conversion in Stripe. The funnel never reconciles.
One record. Four sources. No more reconciling.
Senderstool sits in front of every ESP and product webhook you already run, stitching events onto one subscriber record. Routing, suppression, and analytics roll up from the same record.
Four tools, four views
Each tool holds a fragment. The customer is in pieces. Your CSMs reconcile manually, every meeting.
One unified record
CSMs, lifecycle, and AI agents all read from the same record, in real time.
Three workflows that live in production by Friday.
You're not buying a platform to read docs for six months. These ship in the first week of every Senderstool migration.
Trial-to-paid orchestration
Activation events fire emails. Stripe upgrade kills the nudges. No more "still trying to upgrade me, I already paid".
Churn signal → win-back
Negative sentiment in a support reply plus a drop in usage triggers a win-back, on your best-inbox provider.
Stripe event → email rule
Invoice failed? Card expiring? Escalation rules route to the right template, the right pool, the right cadence.
Your SaaS stack is already wired in.
Out-of-the-box integrations for the tools every SaaS team runs. If your tool's not here, the webhook router gets you there in an afternoon.
Honest answers for SaaS teams.
Does this replace Customer.io / Loops / Braze?
Often, yes. Senderstool gives you the lifecycle engine plus the underlying provider routing in one place. If you're attached to a particular tool, we route through it instead. You keep the editor, we own the delivery layer and the unified record.
How does the Stripe integration work?
Native. Subscription, invoice, payment, and dispute events stream to the same subscriber record as your email events. Rules fire on either signal: "if trial expiring AND no activation, send X". No webhook plumbing on your end.
Is it multi-tenant? Can our customers send through us?
Yes. Multi-tenant is first-class. Isolate routing rules, IP pools, suppression, and analytics per tenant. Several Senderstool customers white-label sending for their own users.
How do you track product activation?
Send activation events (from Segment, PostHog, your own SDK, or a webhook) to Senderstool. They land on the subscriber record next to email events. Rules can then fire emails based on activation state, recency, or absence.
What does this cost for SaaS?
Volume-based pricing on the route layer, flat fee for the orchestration layer. Most SaaS teams come out 30–50% cheaper than their current stack once Customer.io / Loops are retired. Pricing on the call.
How long does migration take?
Two weeks is typical for SaaS, founder-led, with all lifecycle flows rebuilt 1:1. We don't hand you a login; we move into your Slack until your last legacy flow is retired.
Show us your trial-to-paid funnel.
We'll come back within a business day with a migration sketch, a stack review, and an honest read on what would actually move the needle. Pricing on the call.