Your team lives in Slack. When a campaign sends, you want to know in Slack. When a subscriber signs up, you want a notification. When bounce rates spike, you need an alert before checking dashboards.

Slack integration for email tools falls into two categories: notifications (email tool pushes updates to Slack) and actions (you trigger email operations from Slack). Most tools focus on notifications since that's what teams actually use daily.

Here's which email tools do Slack integration best.

What Good Slack Integration Looks Like

Campaign notifications: Send/complete alerts with open and click rate summaries
Subscriber alerts: New subscriber, unsubscribe, and bounce notifications
Automation updates: Notifications when automations trigger or complete
Customizable channels: Route different notification types to different Slack channels
Actionable alerts: Links back to the email platform for quick access
Not too noisy: Configurable thresholds so you don't get a notification for every single event

The 6 Best Options

1. Sequenzy

Best for: SaaS teams wanting subscriber lifecycle notifications in Slack

Sequenzy sends Slack notifications for key subscriber events: new subscribers, tag changes, sequence triggers, and campaign sends. For SaaS teams, the most useful notifications are around lifecycle events. When a subscriber's trial is expiring, when a dunning sequence triggers, or when a user churns, the team sees it in Slack.

The notifications include links back to the subscriber profile in Sequenzy, so you can quickly see the full context. For small teams where everyone wears multiple hats, knowing what's happening with subscribers in real-time keeps customer success proactive rather than reactive.

Slack features: Subscriber notifications, sequence alerts, campaign sends, lifecycle events Pricing: From $29/month Pros: SaaS lifecycle notifications, subscriber context links, simple configuration Cons: Fewer notification types than established platforms

2. Mailchimp

Best for: The most mature Slack integration for email marketing

Mailchimp's native Slack integration is one of the most polished. You get notifications for campaign sends, subscriber activity, and audience changes directly in Slack channels. The integration lets you choose which events trigger notifications and which channels receive them.

You can also use Slack to get quick stats. Ask about recent campaign performance and get open/click rates without leaving Slack. For teams that use Mailchimp for regular campaigns, the Slack integration keeps everyone informed without constant dashboard checks.

Slack features: Campaign notifications, subscriber alerts, performance summaries, channel routing Pricing: Free up to 500 contacts, from $13/month Pros: Most polished Slack integration, configurable notifications, performance summaries Cons: Limited automation depth, pricing increases at scale, basic for SaaS

3. ActiveCampaign

Best for: Teams wanting CRM + email notifications in Slack

ActiveCampaign's Slack integration goes beyond email. You get notifications for email events, deal changes, automation triggers, and contact activity. Since ActiveCampaign includes a CRM, Slack notifications can cover the full customer journey from lead to customer.

The integration supports custom notification rules. Get notified when a high-value deal moves stages, when a specific automation triggers, or when email engagement drops below a threshold. For sales-marketing teams, this keeps both sides informed in one Slack channel.

Slack features: Email notifications, deal alerts, automation triggers, custom rules, channel routing Pricing: From $29/month Pros: CRM + email notifications, custom rules, automation alerts, comprehensive Cons: Can be noisy without careful configuration, complex setup

4. Customer.io

Best for: Technical teams wanting granular webhook-to-Slack automation

Customer.io doesn't have a native Slack app, but its webhook actions in automations are more powerful than most native integrations. You can add a "send to Slack" step in any Customer.io automation, with fully customizable message content using liquid templating.

This means you can create hyper-specific Slack notifications: "User [name] just completed onboarding step 3 but hasn't done step 4 after 24 hours." The flexibility comes at the cost of setup time, since you're building each notification manually rather than toggling prebuilt options.

Slack features: Custom webhook-to-Slack notifications in automations, liquid templating, unlimited customization Pricing: From $100/month Pros: Most flexible, fully customizable messages, can trigger at any automation step Cons: No native Slack app, requires manual setup for each notification, expensive

5. ConvertKit (Kit)

Best for: Creators wanting simple subscriber notifications in Slack

ConvertKit's Slack integration (via Zapier or native) sends notifications for new subscribers, purchases, and tag additions. For creators running newsletters, courses, or digital products, seeing new subscribers appear in Slack is motivating and practical.

The integration is simple by design. You don't get complex routing rules or custom notification templates. You get "new subscriber signed up" and "someone bought your product" notifications in the Slack channel of your choice. For most creators, that's exactly enough.

Slack features: New subscriber notifications, purchase alerts, tag notifications Pricing: Free up to 10,000 subscribers, from $29/month Pros: Simple, creator-focused, motivating for small teams, generous free tier Cons: Basic notifications only, limited customization, not suited for SaaS

6. Loops

Best for: Startups wanting lightweight Slack notifications

Loops can connect to Slack through Zapier for basic notifications. New contacts, event triggers, and automation starts can push to Slack channels. The integration is lightweight, matching Loops' overall philosophy of keeping things simple.

For a small startup team, seeing "New user signed up" and "Onboarding sequence started" in a dedicated Slack channel provides enough visibility into the email funnel without building a dashboard habit.

Slack features: Contact notifications, event alerts (via Zapier) Pricing: Free for 1,000 contacts, from $49/month Pros: Simple, lightweight, good free tier, developer-friendly Cons: Requires Zapier (no native Slack app), basic notifications only

Setting Up Effective Slack Notifications

Channel Strategy

Don't dump all email notifications into #general. Create purpose-specific channels:

#email-campaigns: Campaign send/complete notifications, performance summaries
#new-subscribers: New subscriber alerts (especially valuable for small teams)
#email-alerts: Bounces, spam complaints, deliverability warnings
#customer-lifecycle: Trial expirations, churn alerts, upgrade notifications

Noise Management

Email tools can generate a lot of events. Set thresholds:

Don't notify for every email open (that's hundreds per campaign)
Notify for campaign completion with summary stats instead
Set up individual subscriber notifications only for high-value events
Use daily/weekly digests for metrics, real-time alerts only for problems

Making Notifications Actionable

Good notifications include:

A direct link to the relevant dashboard or subscriber profile
The key metric or data point (not just "campaign sent" but "campaign sent to 2,400 subscribers")
Clear indication of whether action is needed

How to Choose

You want the most polished Slack integration: Mailchimp. Native app with configurable notifications and performance summaries.

You need CRM + email notifications: ActiveCampaign. Full customer journey visibility in Slack.

You're SaaS and want lifecycle notifications: Sequenzy. Subscriber events that matter for SaaS in Slack.

You want fully custom notifications: Customer.io. Build any notification using webhook actions in automations.

You're a creator wanting simple alerts: ConvertKit. New subscriber and purchase notifications.

You want lightweight and simple: Loops. Basic notifications via Zapier for small teams.

FAQ

Can I send emails from Slack? Not directly from most email tools. Slack integrations are primarily for receiving notifications, not sending campaigns. You can use Slack commands to check stats or approve drafts in some platforms, but actual email sending happens in the email tool.

Will Slack notifications replace my email dashboard? No. Slack notifications are for awareness and quick alerts. Detailed analytics, campaign management, and subscriber management still happen in the email platform. Think of Slack as the notification layer, not the management layer.

How do I avoid notification fatigue? Be selective about what triggers notifications. Campaign sends and completions: yes. Every individual email open: no. Bounce spikes above a threshold: yes. Individual bounces: no. Start with fewer notifications and add more as needed.

Can I use Slack to approve email campaigns before sending? Some tools (like Mailchimp and ActiveCampaign) support approval workflows that notify in Slack when a campaign is ready for review. You click through to the email tool to review and approve. It's not a full Slack-native approval flow, but it keeps the team in the loop.