Justas Butkus
Founder & Operator, CallHush
Founder and operator of CallHush. Built and operates the AI multi-channel agent stack used by a vertical B2B SaaS with 2,500+ paid customers. Background: ten deployed AI voice agents across multiple markets, full-stack operator across data, CRM integration, agent prompts and conversation review. Trilingual (LT, EN, RU). EU data residency expert, TCPA / GDPR / EU AI Act Article 50 fluent.
Areas of expertise
Multi-channel orchestration
One AI agent across WhatsApp Business API, SMS short code, voice and email follow-up. Per-contact channel selection driven by response signals. Same memory across all four channels.
AI customer database reactivation
Built reactivation workflows for indie B2B SaaS with 1,000-50,000 paid customers. CSV ingestion, segment design, agent briefing, hand-off-rule definition. HubSpot, Pipedrive, Close, Salesforce, custom CRMs.
Warm inbound callback recognition
Phone-hash-against-CRM matching, prior-conversation context loading, self-scheduled callbacks. The agent treats each customer as one conversation across days and channels, not a sequence of disconnected calls.
Compliance-aware deployment
Every install ships with built-in AI disclosure, recording consent, and region-specific dial-time rules (TCPA in the US, ICO/PECR in the UK, EU AI Act Article 50 transparency obligations in the EU). Right-to-be-forgotten endpoint, opt-in/opt-out tracking, EU data residency by default.
Honest receipts
Articles by Justas Butkus
What Is AI Customer Database Reactivation? A 2026 Definition for Indie SaaS Founders
AI customer database reactivation re-engages dormant paid customers, churned users, and quiet accounts inside your own CRM using a multi-channel AI agent across WhatsApp, SMS, voice and email. Definition pillar for indie SaaS founders.
How Much Expansion Revenue Is Trapped in Your SaaS Customer Database? The Math Behind AI Reactivation
Trapped expansion revenue is the upsell, cross-sell, and reactivation revenue sitting inside a SaaS company's existing customer database. Worked math at €50, €500, and €5,000 ACVs.
What Is AI Customer Success Automation? Definition, Use Cases, and 2026 Examples
AI customer success automation uses AI agents to handle expansion, retention, and win-back conversations with existing paid customers. Differs from support automation in that the goal is revenue, not ticket-deflection.