Every competitor email captured in Competitor Inbox becomes part of a structured, permanent archive. The database is growing — and the more users contribute, the richer it gets for everyone.
This isn't a product you buy a snapshot of. It compounds. Every day, every new subscriber, every sent campaign makes the intelligence deeper.
Growing
Daily new emails
22+
ESPs detected
∞
History retained
What the archive looks like
Your archive starts the day you subscribe to a competitor list — and keeps growing.
Every account that captures emails contributes to a richer dataset — even if you only use it for your own research.
Create a unique tracking address in Competitor Inbox and subscribe to any competitor's mailing list. Every email they send lands in your dashboard automatically.
Every captured email is indexed, timestamped, and enriched — ESP, subject line signals, campaign clustering, design hashes, and deliverability fingerprints.
Your archive compounds month after month. What starts as a stream becomes a rich dataset — seasonal patterns, cadence changes, campaign evolution — all in one place.
Opt in to contribute anonymised campaign metadata to the shared database. Help others benchmark against industry patterns while getting deeper insights yourself.
By opting in to contribute anonymised email metadata — cadence, ESP signals, subject line patterns, campaign types — you help build industry benchmarks that make competitive intelligence more meaningful for every marketer on the platform.
What you contribute
These capabilities are being built on top of the growing archive. The more data that flows in, the sooner they ship.
Monthly send volume and cadence changes on a continuous timeline — see how any brand's email strategy evolves quarter over quarter.
ML models that stitch individual emails into complete flows — welcome series, onboarding sequences, re-engagement drips, and promotional bursts.
Search the entire archive by keyword, subject phrase, sender domain, offer type, or CTA text.
Related emails grouped into clusters by subject similarity, timing, link overlap, and creative patterns.
A full timeline of every ESP a competitor has used, when they switched, and how their deliverability signals changed.
Benchmark competitors against industry baselines built from contributed data — cadence norms, promo frequency by vertical.
Calendar heatmaps showing exact send timing by hour and day of week — across the full history of a brand.
Track how a brand's creative templates and visual identity shifts over time — a proxy for internal team changes.
Your account archive is always private and isolated. Contributing to the shared database never exposes your email content, your account details, or the competitors you're monitoring. We subscribe to publicly broadcast mailing lists exactly as any subscriber would.
Sign up free and start capturing competitor emails today. Your archive starts building immediately — and every account makes the intelligence richer.