Built for Email Operators

Your personal data analyst
for email marketing.

Jandex pulls data from your ESP and gives you an AI analyst that can explain performance, spot trends, compare campaigns, and help you decide what to do next.

Connects to your ESP Built for email teams and agencies AI-powered performance analysis
Live · Reports view
app.jandex.io / reports
Reports
Campaigns
Flows
Tools
Performance · Last 30 days vs prior
Open Rate
42.1%
▲ 3.2%
Click Rate
3.84%
▼ 0.4%
Flow
Revenue
Open
Δ
w
Welcome Series
$42,118
58.3%
+12%
a
Abandoned Cart
$31,402
44.1%
+8%
b
Browse Abandon
$18,260
39.7%
-3%
p
Post-Purchase
$14,832
51.2%
+5%
See it in action

Everything you need to know what's working.

Ask questions in plain English, scan a live dashboard, build client-ready reports, and see every account at a glance. Click through a few of the views below.

app.jandex.io
Illustration · demo data
Jandex

Ask Jandex

AI analyst

Performance

Last 30 days vs prior
Open Rate
42.1%
▲ 3.2%
Rev / Recipient
$0.44
▲ 11%
Flow
Revenue
Open
Δ
w
Welcome Series
$42,118
58.3%
+12%
a
Abandoned Cart
$31,402
44.1%
+8%
b
Browse Abandon
$18,260
39.7%
-3%
p
Post-Purchase
$14,832
51.2%
+5%

Monthly Report · Northwind Goods

November 2026
Campaign Rev
$112K
▲ 14.2%
Flow Rev
$136K
▲ 22.7%
AI summary Strong month, driven by the Welcome Series (+12%) and the Black Friday teaser campaign. Browse Abandon is trending down — a recommended A/B revert is queued for next week. Discount reliance held steady at 21% of revenue.

Agency Dashboard

Last 30 days vs previous 30
Client
Total
Campaign
Flow
NNorthwind Goods
$683K+30%
$465K
$218K
LLumen Skincare
$402K-11%
$271K
$131K
MMaple & Mort.
$385K+84%
$236K
$150K
PPinecrest Coffee
$318K+0.2%
$192K
$126K
SSummit Gear Co.
$280K+130%
$218K
$63K

Each client shown in its own currency. Studio, Agency & Pro plans.

Tools

5 of 12 shown
Send-time heat map
Subject word lift
"hours"+11%
"scent"+7%
emoji-18%
Discount dependency
21%
of revenue from promos
Deliverability
Bounce
0.42%
Spam
0.01%
Unsub
0.18%
The problem

Your ESP has the data. It just doesn't explain what it means.

You can see revenue, opens, clicks, flows, campaigns, and segments. But when you need to know why performance changed, which campaign drove the lift, what flow is underperforming, or what to do next — you still have to dig.

Jandex gives you an AI analyst that reads your email data and helps turn performance into answers.

monday-morning.txt
What your ESP shows
Revenue, last 30 days
Open & click rates
Orders by campaign & flow
Unsubscribes & list growth
What you still have to figure out
?Why did revenue drop last week?
?Which campaign actually drove the lift?
?Which flow is quietly slipping?
?What should I do next?
All the data. None of the answers.
The AI analyst

Ask your email data anything.

Jandex connects to your ESP and gives you an AI analyst that can answer performance questions, compare campaigns, explain trends, and help your team find the next best move.

Why did revenue drop last week?
Which campaign performed best this month and why?
What flows are underperforming right now?
Where are we losing engagement?
What should we test next?
Which segment is most valuable?
What changed compared to the previous period?
What should I tell the client this week?
Three assistants

Your email team, powered by AI.

Three specialists, each tuned for a different kind of question. All grounded in your account data — not generic AI guessing from screenshots.

D
Data Assistant

Get quick answers from your performance data.

Ask about revenue, opens, clicks, conversions, flows, campaigns, segments, and timeframes — without searching through your ESP manually.

"Welcome series did $42,118 last month. Up 12% vs prior. Open rate 58.3%."
C
Creative Strategist

Turn performance into better campaign ideas.

Use what worked before to generate campaign angles, subject lines, content ideas, and testing opportunities — grounded in your account data.

"For the Black Friday teaser: lead with restock urgency, not discount %. Your audience converts 2.3x better on scarcity framing."
A
Personal Analyst

Find the story behind the numbers.

Get deeper analysis on trends, weak spots, opportunities, account health, and what your team should focus on next.

"Browse Abandon is the only flow trending down. The A/B test you ran 3 weeks ago picked the worse variant. Recommend reverting."
The dashboard

See the numbers behind every answer.

Prefer to look at the data yourself? Jandex also gives you a clean performance dashboard with campaign, flow, revenue, and engagement metrics in one place.

Use it to validate AI answers, spot trends visually, and build faster reports for your team or clients.

dashboard.json
Performance · This month
Total Sent
412.8K
▲ 14.1%
Conversions
1,847
▲ 9.6%
Avg Order Value
$87.40
▲ 2.1%
Client-ready reporting

Turn analysis into updates clients understand.

Once Jandex helps you find the story, the reporting view helps you package it into a clear performance update.

No more bouncing between dashboards, spreadsheets, screenshots, and notes just to explain what happened.

monthly-report.pdf
Monthly Performance Report
Northwind Goods · November 2026
Open Rate
42.1%
▲ 3.2%
Conversions
1,847
▲ 9.6%
Summary Strong month driven by Welcome Series (+12%) and the Black Friday teaser. Browse Abandon trending down — recommended A/B revert is queued for next week.
The toolkit

Every tool email operators reach for, in one place.

Beyond the AI analyst and reports, Jandex ships a full set of purpose-built tools — for flows, analysis, list health, deliverability, and getting work out the door.

Performance & analysis
Comparison Tracker

Compare flows or campaigns side by side over any date range. Spot what's working instantly.

Heat Map

Opens, clicks, and orders by hour and day of week. Find your real send window.

LTV Curve

Cohort lifetime value over 24 months. See where revenue per signup plateaus.

Repeat Purchase Timing

Days between order 1 and order 2 across customers — so win-back flows fire at the right moment.

Email Frequency Sweet Spot

The cadence that converts vs the cadence that triggers unsubscribes, from your own data.

Click Latency

Time from click to purchase. Time follow-ups, urgency, and attribution windows.

Time to First Purchase

How long subscribers take to buy after subscribing, viewing a product, or browsing — so welcome timing matches reality.

Subject lines & testing
Subject Line Leaderboard

Rank every subject by open, click, and revenue — and the patterns that move your audience.

Subject Word Insights

Which exact words lift opens and clicks for your list — a vocabulary of what works.

Discount Dependency

How much revenue rides on discounts, and whether that share is climbing.

A/B Test Archive

Every test you've run with the real winner highlighted across opens, clicks, and revenue.

A/B Test Significance

Real statistical significance — catches false positives other tools call winners.

A/B Test Patterns

After 10+ tests, the durable patterns emerge: "subjects under 30 chars: +8% opens."

List health & audience
Subscriber Health

List growth, churn, and deliverability trends — spot issues before they hit your reputation.

Auto List Clean

Suppress unengaged subscribers on rules you set. Better deliverability, lower send cost.

Hidden Best Customers

Subscribers who rarely open but always buy — surfaced so list cleaning doesn't lose them.

Audience Builder

Turn engagement patterns into segments — target people who opened in specific windows.

Monitor & operate
Marketing Anomaly Detector

An automatic watch on every flow and campaign — flags unusual spikes or drops in sends, engagement, unsubscribes, and revenue before they cost you.

Deliverability Monitor

Bounce, spam, and unsub trends with health thresholds and worst-offender surfacing.

Agency Dashboard

Every client's revenue at a glance, each in its own currency. Studio, Agency & Pro.

Pricing

Pricing that scales with your client list,
not your headcount.

No per-seat games. No per-contact billing. Pay for the number of accounts you manage. Add or remove anytime — your plan adjusts.

Solo
$24 /month
1 account
All reporting tools
Daily syncs & heatmap
Click latency analysis
50 AI credits/month
Get started
Agency
$118 /month
15 accounts
Everything in Studio
500 AI credits/month
Bulk account management
White-glove onboarding
Get started
Pro
$198 /month
30 accounts
Everything in Agency
1,000 AI credits/month
Dedicated success rep
Early access to new features
Get started
Need more accounts? Email us for custom enterprise pricing.
Get started

Three steps. Five minutes.

No engineer required. If you can paste an API key, you can run Jandex.

Step 01

Connect your ESP

Paste your read-only API key. We never write to your account, never email your subscribers, never touch your campaigns.

Step 02

View your reports

Pick a date range. See revenue, opens, clicks, conversions, and every flow's performance with period-over-period deltas — the same numbers, finally legible.

Step 03

Ask the assistants

Three AI assistants already know your account. Ask for last month's flow revenue, a subject line for Friday, or a strategic read on what's trending down.

FAQ

Questions? Answers.

frequently-asked-questions.md
No. Your ESP runs the sends. Jandex reads the data. Jandex is an independent analytics layer that connects to your ESP's public API using credentials you provide.
We're starting with one major ESP and expanding from there. Mailchimp, Sendgrid, Customer.io are all candidates. No promises on dates — we'd rather ship the next integration well than announce three of them poorly.
The AI assistants pull directly from your connected ESP account. They can be wrong about strategy. They can't make up the open rate.
On the roadmap. Premium tier when it ships. The architecture is already there — we're just not selling it until the experience is polished.
Yes — Jandex is live. Sign up, connect your ESP, and you'll be analyzing your account within a few minutes. No invite or waitlist.
jan
Built by someone who's been on your side of the dashboard

Not a VC-backed company.

I built Jandex because I kept watching strategists spend their best hours rebuilding the same Monday report. Smart people, doing data entry, because email platforms don't ship a layer for the person who isn't a marketer.

This is the tool I wished existed. It's not packed with features I've never used. It's built around the four things agencies actually do every week.

If it works for you the way it works for me, you'll know in the first ten minutes.

Jan, founder of Jandex
Get started

Start analyzing your email program today.

Connect your ESP and Jandex turns your campaign and flow data into clear answers — an AI analyst, deep-dive tools, and client-ready reports. Enter your email to create your account.

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