How to Build a SaaS Onboarding Email Sequence

The first week after someone signs up for your SaaS product is make-or-break. Users who reach their first “aha moment” quickly tend to stick around. Those who don’t will churn before their trial ends. A well-crafted onboarding email sequence bridges that gap – it meets new users in their inbox and guides them step by step toward getting real value from your product.

Why Onboarding Emails Matter

Most SaaS products have a gap between signing up and truly understanding the product. Onboarding emails close that gap in three ways:

Reduce churn – Users who receive timely guidance during their first week are far more likely to convert from trial to paid. Every email is a nudge back into your product at a moment when attention is fragile.
Drive activation – You know which actions separate successful users from those who drop off. Onboarding emails can point users directly toward those activation milestones with clear calls to action.
Educate without overwhelming – Your product probably does a lot. Dumping every feature on someone on day one is counterproductive. A drip sequence lets you introduce capabilities gradually, one email at a time.

Planning Your Sequence

Before you open Broadcast, map your sequence to your product’s activation milestones. Ask yourself:

What does a successful user accomplish in their first week?
What are the one or two actions that correlate most strongly with retention?
Where do users typically get stuck or confused?

Your onboarding emails should align with those answers. Each email pushes the user toward the next milestone, not just the next feature.

Example: A 5-Email Onboarding Sequence

Here is a proven structure you can adapt to your product.

Email 1: Welcome (Immediately)

Send this the moment someone signs up. Thank them for joining, set expectations for what they will receive, and give them one clear call to action – the single most important first step in your product.

Keep it short. Three to five sentences, one button. Something like: “Welcome to [Product]. Here’s how to get started in under two minutes.” Link directly to the action, not to a generic dashboard.

Email 2: Quick Win (Day 1)

Twenty-four hours later, guide the user to their first value moment. This is the email that says “Here’s how to do the thing you signed up for.” If your product is a project management tool, this might be “Create your first project.” If it is an email marketing platform, it might be “Send your first broadcast.”

Be specific and show them how. A short walkthrough with a screenshot or a numbered list of three steps works well.

Email 3: Feature Highlight (Day 3)

By day three, users who followed your first two emails have the basics down. Now introduce a feature they might not discover on their own – something that makes your product stickier. Frame it around a benefit, not the feature itself. Instead of “Did you know we have keyboard shortcuts?” try “Save 20 minutes a day with these shortcuts.”

Midway through the first week, reinforce their decision to sign up. Share a short case study, a testimonial, or a concrete result another customer achieved. Numbers are powerful here: “Company X increased their open rates by 35% in the first month.” This builds confidence that they made the right choice.

Email 5: Check-In (Day 7)

A week in, send a genuine check-in. Ask if they have questions. Offer a link to your help docs, a way to book a call, or a direct reply to the email. This is also a good place to mention your support channels. The tone should be helpful, not salesy.

Building It in Broadcast

Here is how to set this up step by step.

Create the Sequence

Navigate to Sequences in the sidebar
Click New Sequence
Open Settings and name it “SaaS Onboarding”
Make sure the sequence status is set to Inactive while you build it

Set the Entry Trigger

Your sequence needs to know when to start. You have two options:

Tag-based entry – Trigger the sequence when a subscriber receives a specific tag like signed-up. This works well when your app adds subscribers via the API.
Segment-based entry – Trigger based on a segment rule, such as “subscribed in the last 24 hours” or “has tag new-user.” This is useful if subscribers arrive through opt-in forms.

Add an Entry Point step and configure your trigger.

Add Your Email Steps

Add a Send Email step for your Welcome email. Write the subject line, compose the body, and include your single CTA.
Add an Add Delay step set to 1 day.
Add a Send Email step for your Quick Win email.
Add an Add Delay step set to 2 days.
Add a Send Email step for your Feature Highlight email.
Add an Add Delay step set to 2 days.
Add a Send Email step for your Social Proof email.
Add an Add Delay step set to 2 days.
Add a Send Email step for your Check-In email.

Add Conditional Logic

After the Social Proof email on Day 5, consider adding a Condition step. For example:

If the subscriber opened the previous email, continue to the Check-In.
Else, send an alternative re-engagement email with a different subject line and a more direct ask – something like “Is [Product] working for you? Here’s help if you need it.”

This keeps your sequence responsive to user behavior rather than blindly sending the same thing to everyone.

Mark Completion

At the end of the sequence, add an Add Tags step to tag subscribers with something like onboarding-complete. This lets you segment users later and ensures they do not accidentally re-enter the sequence.

Activate

Once you have reviewed every step and sent test emails to yourself, go back to Settings and set the sequence to Active.

Personalization Tips

Broadcast supports Liquid template variables in your email content. Use them to make your onboarding feel personal:

{{ subscriber.first_name }} – Address users by name. Fall back gracefully with a default: {{ subscriber.first_name | default: "there" }}.
{{ subscriber.custom_data.plan }} – If you store the user’s plan type in custom data, you can tailor content. Show different feature highlights to users on a free plan versus a paid plan.
{{ subscriber.custom_data.company }} – Reference their company name for a more personal touch.

Connecting to Your App via API

To automatically enroll new users in your onboarding sequence, use the Broadcast API from your app’s signup flow.

When a user signs up, make a POST request to add them as a subscriber (if they are not already one) and then enroll them in the sequence:

POST /api/v1/sequences/:sequence_id/add_subscriber

Include the subscriber’s email and any custom data you want to use for personalization. This way, every new signup enters your onboarding sequence without any manual work.

You can also add tags via the API (POST /api/v1/subscribers/:id/tags) to trigger tag-based entry if that is how your sequence is configured.

Measuring Success

Once your sequence is running, track these metrics for each step:

Open rate – Are your subject lines working? If a specific email has a noticeably lower open rate, test a new subject line.
Click-through rate – Are users taking the action you asked for? Low clicks mean your CTA is not compelling enough or the content is not relevant.
Drop-off points – Where do users stop engaging? If everyone opens Email 1 but nobody opens Email 3, the gap between Day 1 and Day 3 might be too long, or Email 2 did not build enough momentum.

Use these signals to iterate. Onboarding sequences are never truly “done” – they get better over time as you learn what resonates.

Best Practices

Keep emails short. Three to five paragraphs maximum. Users are busy, especially in their first week with a new tool.
One CTA per email. Do not ask users to do three things. Ask them to do one thing well.
Send from a real person. “Sarah from [Product]” performs better than “The [Product] Team.”
Test on real users. Send yourself through the entire sequence before activating it. Read every email on mobile.
Iterate based on data. Check your sequence metrics weekly for the first month and adjust timing, copy, and CTAs based on what you see.