Get early access to Klar

Klar is an email performance intelligence platform, starting with Klaviyo and expanding to more platforms soon. It reads your campaign and flow history and delivers a short, evidence-backed brief on what's working, degrading, or at risk, grounded in real statistics.

To qualify for early beta access

Klar is built for accounts with real send history.
Everyone joins the waitlist, and qualifying accounts get invited first.

Daily brief · 7-day window
4/5

Sunday deliverability is dragging open rate by 4.1 points.

One watch item, five insights, and three next steps grounded in 247 sends across 38 campaigns and 6 flows. The Sunday cadence is doing the work, but the inbox is the problem.

Revenue / recipient
$0.142
▲ 6.2% vs $0.134
Open rate
38.4%
▼ 2.1 pts vs 40.5%
Click rate
4.8%
▲ 0.3 pts vs 4.5%
View next stepsRead full briefView raw numbers
Insight · pattern
5/5

Sunday sends convert 2.4× better, but only 12% of you see them.

Of your 247 sends this week, 31 fell on Sunday. Open and click rates are 2.4× and 1.8× the weekday average, but inbox placement is 18 pts lower that day.

Sunday sends (n=31)
52.1%
▲ 2.4× rest of week
All other days (n=216)
36.4%
baseline
Inbox placement
−18 pts
▼ lower on Sunday
View full patternSee other days
Insight · holds
4/5

Your VIP segment is outperforming itself. Leave the cadence alone.

VIP cohort (top 8% by LTV) hit its strongest week on record. Cadence is unchanged, and the signal is real, not segment drift.

Open rate
71.2%
▲ strongest on record
Revenue / recipient
$0.31
▲ record RPR
Cohort size
1,842
top 8% by LTV
View segmentSee cadence