TL;DR: Connect your Klaviyo account to FUSE.is in under 2 minutes via OAuth. Once connected, ask AI-powered questions about your email and SMS campaigns, automation flows, subscriber segments, and product catalog — all through natural language. FUSE.is is read-only, SOC 2 Type 1 compliant, and never modifies your Klaviyo data.
Why Connect Klaviyo to FUSE.is?
Klaviyo is one of the most powerful email and SMS marketing platforms for e-commerce brands. But extracting actionable insights from your campaign data, flow performance, and subscriber behavior typically means navigating multiple dashboards, exporting CSVs, or writing API queries.
FUSE.is changes that. By connecting your Klaviyo account, you unlock AI-powered analytics that let you ask questions in plain English and get instant, structured answers. No SQL, no API knowledge, no spreadsheet gymnastics.
What you can analyze:
- Campaign performance — open rates, click rates, revenue attribution, A/B test results across email and SMS
- Flow & automation insights — conversion rates, revenue per recipient, trigger effectiveness, drop-off analysis
- Subscriber & segment analytics — audience growth, engagement scoring, segment composition, list health
- Cross-channel comparison — email vs. SMS performance side-by-side
- Product catalog intelligence — catalog item distribution, category breakdown, feed health
How to Connect Klaviyo to FUSE.is
Connecting takes less than 2 minutes. Here's the step-by-step:
Step 1: Navigate to Data Sources
Log into your FUSE.is account and go to Settings > Data Sources. You can also access this directly at app.fuse.is/secure/datasources.
Step 2: Click "Connect Klaviyo"
Find Klaviyo in the list of available integrations and click Connect.
Step 3: Authorize Access
You'll be redirected to Klaviyo's OAuth consent screen. FUSE.is requests 10 read-only scopes — we never write to, modify, or delete any of your Klaviyo data.
The scopes requested are:
- Accounts, Campaigns, Catalogs, Events, Flows, Lists, Metrics, Profiles, Reporting, Segments
Review the permissions and click Allow.
Step 4: Account Discovery
After authorization, FUSE.is automatically discovers your Klaviyo account and begins syncing metadata. This includes your campaigns, flows, subscriber lists, segments, and metrics.
Step 5: Start Querying
Once the sync completes (usually under 60 seconds), your Klaviyo data source shows as Active. Head to the FUSE.is chat interface and start asking questions.
Example Queries You Can Ask
Here are some example questions to get you started:
Campaign Performance:
- "What were my top 5 email campaigns by revenue in the last 30 days?"
- "Compare open rates between my welcome series and promotional campaigns"
- "Which A/B test variants performed best this quarter?"
Flow & Automation:
- "How are my welcome series flows performing? Compare conversion rates."
- "What's the revenue per recipient across all active flows?"
- "Show me drop-off rates by flow action step for my abandoned cart flow"
Subscribers & Segments:
- "Show me subscriber growth trends for the last 6 months"
- "What's the engagement breakdown across my VIP segments?"
- "How many new subscribers did I get this week vs. last week?"
Cross-Channel:
- "Compare email vs. SMS campaign performance this quarter"
- "Which channel has the highest revenue per message sent?"
Product Catalog:
- "What products are in my catalog and how are they distributed by category?"
- "Give me a catalog health overview"
What Data Does FUSE.is Access?
FUSE.is uses Klaviyo's official OAuth 2.0 API with PKCE (Proof Key for Code Exchange) — the most secure authorization method available. Here's exactly what we access:
FUSE.is never creates, updates, or deletes anything in your Klaviyo account. All 10 OAuth scopes are strictly read-only.
Security & Compliance
We take data security seriously. Here's how your Klaviyo data is protected:
- SOC 2 Type 1 compliant — Attested March 2026 via Comp AI. Type 2 audit in progress.
- OAuth 2.0 with PKCE — Industry-standard secure authorization. No passwords stored.
- AES-256 encryption at rest — All stored credentials and metadata are encrypted.
- TLS 1.2+ in transit — All API communication is encrypted.
- No tokens in logs — OAuth tokens are never written to application logs.
- Server-side only — Token exchange happens server-side. Credentials never reach the browser.
- MFA enforced — Multi-factor authentication required for all admin access.
Review our full security posture at trust.fuse.is, including 39 policies and 48 controls across SOC 2 and GDPR frameworks.
How to Disconnect
If you want to remove the Klaviyo connection:
- Go to Settings > Data Sources in FUSE.is
- Click Disconnect on your Klaviyo data source
- The connection is removed and FUSE.is stops accessing your Klaviyo data
You can also revoke access from the Klaviyo side by going to Klaviyo > Settings > Integrations and removing FUSE.is.
Frequently Asked Questions
Does FUSE.is modify my Klaviyo data?
No. FUSE.is uses exclusively read-only API scopes. We never create, update, or delete campaigns, flows, subscribers, or any other Klaviyo data. Your account is completely safe.
How long does the initial setup take?
Under 2 minutes. The OAuth connection takes about 30 seconds, and the initial metadata sync completes in under 60 seconds for most accounts.
What Klaviyo plan do I need?
FUSE.is works with all Klaviyo plans that support OAuth integrations, including Free, Email, and Email+SMS plans.
Is my data shared with third parties?
No. Your Klaviyo data is only used within FUSE.is to power your AI-driven analytics. We do not sell, share, or expose your data to any third party. See our privacy policy at fuse.is/privacy.
How is the connection secured?
We use OAuth 2.0 with PKCE (S256), the most secure authorization flow available. Tokens are encrypted at rest with AES-256 and are never exposed to the browser or logged. FUSE.is is SOC 2 Type 1 compliant.
Can I reconnect after disconnecting?
Yes. Simply click "Connect Klaviyo" again and re-authorize. Your previous AI chat history is preserved — only the data connection is re-established.
What if my connection shows "Needs Reauth"?
This means the OAuth token has expired (after 90 days of inactivity) or was revoked from the Klaviyo side. Click the "Reconnect" button to re-authorize and restore the connection.
Get Started
Ready to unlock AI-powered analytics for your Klaviyo data?
- Sign up at FUSE.is if you don't have an account
- Connect Klaviyo from Settings > Data Sources
- Ask your first question in the FUSE.is chat
Need help? Reach out at fuse.is/support.
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