Honest tracking
Apple MPP detection and layered confidence. We never claim 100% accuracy — honesty is the whole point.
Open source · Minimal permissions
Know if they read it —honestly.
EmailKnow tracks opens and clicks, tells you the truth about each signal, and uses it to follow up at the right moment — without ever reading your email body.
No credit card · Reads email headers only · Body never stored
The honest signal
Four states. No lies.
Most trackers pretend every pixel load is a real read. Apple Mail preloads images, and your own opens get counted too. We label every signal for what it actually is.
- Clicked High intent
They clicked a link. The strongest signal — unaffected by Apple, confirmed human.
- Human open Medium
A genuine open from a non-Apple IP. Likely a real read.
- Apple preload Uncertain
Apple Mail Privacy Protection preloaded the image. We flag it — not a confirmed read.
- Unknown No signal
Never loaded. Maybe unread, maybe images off. We won't guess.
Opens from your own device are detected and excluded — we won't count you reading your own email as a recipient open.
The closed loop
Tracking that drives the follow-up
Competitors stop at tracking and leave you to guess. EmailKnow turns the signal into the decision.
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Write & send
Compose in Gmail. Optionally attach a follow-up rule.
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Track signals
Clicks, human opens, Apple preloads, replies — layered by confidence.
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Decide by signal
Replied → cancel. Read but no reply → a warm nudge. No signal → resend with a new subject.
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Auto follow-up
Sent in the same thread, at the right time, through your own Gmail.
The signal driving the decision — that's the moat. A generic “no reply → follow up” doesn't know if they even saw it.
Why EmailKnow
Built on the trust competitors squandered
Signal-driven follow-ups
Read, clicked, or replied decides the timing and the wording. Others can't do this.
Minimal permissions
Only gmail.send + gmail.metadata (headers). Never your email body, attachments, or contents.
Open source
100% auditable. No hidden pixels reading what they shouldn't.
Your data, yours
Tracking data lives under your account, exportable and deletable. Never sold.
Near-zero footprint
Runs on the edge, doesn't slow down Gmail, fails open — a broken tracker never eats your email.
Permission posture
We read headers. Never your email.
The cleanest permission stance in the category — and we say exactly what we touch.
We do
- gmail.send — send follow-ups on your behalf
- gmail.metadata — read headers (sender, subject, thread) to detect replies
- Sign-in uses openid / email / profile only — no Gmail data
We never
- Never reads your email body or attachments
- Never stores message contents — only header-level metadata and events
- IP stored only as a salted SHA-256 hash, never in plaintext