Now in early access · Free up to 100 emails / month

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.

Request early access See the agents →

Limited to 100 teams · We’ll email your invite

Signal trace · live tracking

to [email protected]

Proposal — Q3 rollout & pricing

sent

0 signals capturedscore 0 · new

The platform · v1

Four agents. One inbox.

Watcher

→

Auto-tag the inbound threads you care about

Write rules on sender, subject, body. Matches land on your Watch List, optionally with a Remind chain attached.

Followup

→

Sequences that stop on engagement

Multi-step per recipient. The next step skips when the engagement score crosses your threshold — or when they reply.

Remind

→

Wake you up on threads gone cold

One-click reminder pattern (+1h / +3h / +1d / +3d). Auto-dismisses the second you reply.

Track

→

Know who opened, honestly

One pixel per recipient — see which person opened, not just "someone". Six bot layers, verdict-tagged so Apple MPP and Gmail proxy never fake a read.

Honesty by default

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 your engagement score reflects humans, not infrastructure.

How Track scores honestly →

Verdict distribution · 1,000 sample sends

HUMAN42%

MPP_PROXY28%

GMAIL_PROXY11%

PIXEL_PROXY9%

BOT10%

Only HUMAN gets full weight. Everyone else: partial or zero.

Three surfaces, one workspace

Wherever you read email.

Chrome extension

Daily driver

Thread pills, compose carets, inbox engagement column, persistent floater with Watch / Followup / Reminder tabs.

Gmail add-on

Mobile + web

Reading- and compose-side cards inside Gmail itself. Works on mobile Gmail where the extension can't.

Web dashboard

The console

Every sent email, every active sequence, every cohort, every analytics view. Bulk send, templates, billing.

Privacy by architecture

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.

Read the docs →