Real-time contact validation for cold outreach

Problem Context

Outbound sales teams send 500–1,000 cold emails weekly to VPs/Directors at Series A-C companies. They rely on a tech stack (e.g., WarpLeads, ZeroBounce, Lemlist) to source, verify, and send emails, but 15–20% still bounce—wasting time, hurting sender reputation, and filling pipelines with dead contacts.

Pain Points

Teams manually stitch together tools (e.g., ZeroBounce for emails, Apollo for phones) but still get 7–22% bounce rates. Failed workarounds include overhauling lead sourcing, adding enrichment layers, and using separate verification tools—none fix the core issue: *real-time- validation of all contact layers (email, phone, domain, company) before sending.

Impact

Wasted time (5+ hours/week chasing dead leads), tanked sender reputation (higher spam flags), and missed revenue (20% of pipeline is ghost contacts). Teams also face higher costs from manual fixes (e.g., hiring consultants to audit bounce logs) and lost trust with sales leadership.

Urgency

Bounce rates degrade sender reputation daily, directly impacting deliverability. A 15% bounce rate can trigger ESP (e.g., Gmail, Outlook) throttling or blacklisting within weeks. Teams can’t ignore this because it’s not just a metric—it’s a revenue leak (e.g., 100 bounced emails = 100 lost opportunities).

Target Audience

Outbound sales managers, revenue operations specialists, and SDRs at SaaS companies (Series A–C) running cold email/phone campaigns. Also affects agencies, recruiters, and B2B marketers who rely on high-volume outreach. Any team sending >500 cold emails/month faces this.

Solution Approach

A single API that validates *all- contact layers (email, phone, domain, company) in real-time before sending. It replaces the fragmented toolchain (e.g., ZeroBounce + Apollo + Clearbit) with one system that checks: (1. email syntax + domain age + mailbox status, (2. phone number validity + carrier data, (3) company existence + role accuracy. Teams plug it into their existing workflow (CRM, email tool, or API).

Key Features

1. Real-time monitoring: Tracks bounce rates by campaign/source and flags degrading sender reputation before it hurts deliverability.
2. CRM/email tool integrations: Plugs into HubSpot, Lemlist, Apollo, or custom APIs with no code.
3. Spam risk scoring: Rates each contact’s likelihood of bouncing/spamming (0–
4. based on proprietary rules (e.g., ‘domain age < 6 months = high risk’).

User Experience

Teams add the API to their existing workflow (e.g., HubSpot workflow or Lemlist sequence). Before sending, it auto-checks every contact and flags invalid ones. Users see a dashboard showing bounce rates by source/campaign, spam risk scores, and a ‘clean contacts’ list ready to send. No manual exports or tool-switching—just one click to validate and send.

Differentiation

Unlike ZeroBounce (email-only) or Clearbit (company-only), this validates *all- contact layers in real-time with proprietary rules (e.g., phone carrier data + domain age). It also monitors bounce rates continuously, not just at send-time, so teams catch reputation risks early. Competitors require manual tool-switching; this is a single API with CRM/email tool integrations.

Scalability

Starts with a pay-per-validation pricing model ($0.01–$0.03/contact) for small teams, then scales to seat-based ($50–$100/mo) for enterprises. Adds features like A/B testing for validation rules, custom spam risk thresholds, and Slack/email alerts for reputation changes. Integrates with more CRMs/email tools over time (e.g., Salesforce, Outreach).

Expected Impact

Reduces bounce rates by 80%+ (from 15–20% to <3%), saves 5+ hours/week chasing dead leads, and stops sender reputation degradation. Teams also see higher connect rates (e.g., +7% as in the post) because they’re only calling valid contacts. ROI is immediate: $50/mo saves $500+ in wasted outreach costs.