The agents your inbox needed.
Four narrow agents on Gmail today — with more shipping. Each does one thing, on rules you write, with every decision visible before it ships.
Limited to 100 teams · We’ll email your invite
Four agents. One inbox.
Most “opens”
aren’t opens.
Apple Mail Privacy Protection pre-fetches every pixel. Gmail’s image proxy does the same, less aggressively. Track labels them honestly — partial credit, not full open — so what you see reflects humans, not infrastructure.
How Track verdicts honestly →Verdict distribution · 1,000 sample sends
Only HUMAN counts as a genuine read. Everyone else: excluded or shown with a qualifier.
Wherever you read email.
Chrome extension
Daily driverThread pills, compose carets, inbox engagement column, persistent floater with Watch / Followup / Reminder tabs.
Web dashboard
The consoleEvery sent email, every active sequence, every cohort, every analytics view. Bulk send, templates, billing.
Recipient data, isolated.
Encrypted at rest
Recipient PII encrypted AES-256-GCM under a per-workspace key. 79+ encrypt call sites across the API.
Encrypted in transit
TLS 1.2+ on every leg. HSTS site-wide. No internal HTTP. Cloud Run + Cloudflare + Neon.
No third-party tracking
Zero analytics or advertising trackers on this website or in the product. Your data runs Signum, that's it.
Full disclosure — what we are not — on the Security page.
Stop guessing. Start knowing.
Free up to 100 emails / month. All four agents on day one. More shipping.