Email Hygiene Decisions Across All Your ESPs
We compute suppression decisions from your delivery data and plug them into your existing tools. You stay in control of how they're enforced.
Email lists naturally decay by 25-30% every year. People change jobs, abandon old inboxes, or mistype addresses in forms. This natural churn fills your list with invalid addresses, spam-trap domains, and "role" accounts (info@, sales@) that rarely convert. When you hit Send, these bad addresses bounce or trigger filtering algorithms that flag you as a spammer—resulting in lower inbox placement, shrinking open rates, and quietly leaking revenue.
Bad list hygiene damages your sender reputation across all future campaigns. Internet Service Providers keep score: exceed a ~2% hard-bounce rate or accumulate too many complaints and they throttle or block your domain altogether. The result is lost pipeline, wasted ad spend, and frustrated teams wondering why their "great email" never reaches real people.
Traditional list cleaning requires manual exports and tedious verification processes. And if you use more than one ESP, manual exports between platforms leave dangerous gaps — contacts bouncing in HubSpot can keep receiving from Customer.io. CommsOK instead connects directly to your ESP, monitors each send's delivery and engagement signals, and identifies addresses showing signs of decay—hard bounces, spam-trap patterns, chronic non-openers. It computes suppression decisions and delivers them to your platforms, so you can exclude risky recipients from future campaigns with confidence.
Why Trust Us
Trust built into the product, not just the team
Evaluate Before You Activate
Run a historical backfill and preview exactly which recipients would be suppressed, which rules would fire, and why — before activating anything.
Versioned Rulesets
Every change to your suppression policy is versioned. You can compare rule versions, understand what changed, and roll back if needed.
Decision Transparency
Every suppression decision includes the rule that produced it, the signals that triggered it, and the reasoning behind it. Nothing is hidden.
Read-Only by Default
CommsOK connects to your ESPs with read-only API keys. No infrastructure changes, no write access surprises.
Before founding CommsOK, I built an email hygiene system that handled over 95% of email communications for one of the world's largest tech platforms. It helped remove the company from all major spam blacklists and increased email delivery from 86% to 98%.
You can see the details on my LinkedIn profile.
How CommsOK Protects Your Email Reputation
Cross-ESP hygiene decisions you can trust, delivered to your platforms continuously.
Cross-ESP Suppression
One bounce in any platform produces a suppression decision across all of them. Decisions are delivered to your ESPs and CRMs — you control how they're enforced.
Engagement-Based Hygiene
Track delivery, opens, clicks, and complaints across all ESPs. Identify contacts showing signs of decay before they damage your reputation.
Configurable Policy Engine
Define suppression rules — hard bounces, complaint thresholds, engagement decay windows — and CommsOK evaluates them continuously. Preview the impact before activating.
Read-Only Integration
Connect with a read-only API key. No infrastructure changes required. CommsOK observes events and delivers suppression decisions to your platforms.
How CommsOK Works
From connection to trusted hygiene decisions in three steps.
Connect Your ESPs
Add your email platforms with read-only API keys. No infrastructure changes required.
Evaluate Before You Commit
Run a historical backfill to see your actual deliverability exposure. Preview exactly which recipients would be suppressed and why — before activating anything.
Activate and Close the Loop
Activate your ruleset. CommsOK continuously computes suppression decisions and plugs them into your campaigns and workflows.
A Decision Layer, Not a Black Box
Some tools monitor your email ecosystem and tell you what happened. CommsOK computes what to do about it — with rules you control.
Inspectable Decisions
Every suppression decision shows exactly which rule fired, what evidence was used, and why. No guessing, no hidden logic.
Deterministic Rules
Same inputs always produce the same outputs. Your suppression policy is explicit, versioned, and reproducible — not a model that changes unpredictably.
You Stay in Control
You define the rules. You evaluate the impact before activating. You decide how decisions are enforced in your platforms. CommsOK computes — you control.
Seamless Integrations
Connect with your existing email marketing platforms and workflows.
Currently Supported
Coming Soon
Security & Compliance
Your data security and privacy are our top priorities.
Data Encryption
TLS 1.2+ for data in transit and AES-256 encryption for data at rest.
US-Based Operations
All data processed and stored in US data centers with trusted sub-processors.
Privacy Compliance
Following GDPR and CCPA principles with comprehensive data protection measures.
Ready to See Your Deliverability Exposure?
Connect your ESPs, run a historical analysis, and get suppression decisions you can trust. 30-day money back guarantee.