- Founded
- 2021-01-01 in Tel Aviv, Israel
- Headquarters
- Tel Aviv, Tel Aviv, Israel
Warmy is a bootstrapped SaaS company dedicated exclusively to email deliverability and sender reputation. Founded in 2021 by brothers Daniel and Michael Shnaider, the platform emerged from their own frustration when cold emails for an Amazon business consistently landed in spam. Today, Warmy serves over 3,000 active customers and has been used by more than 50,000 companies worldwide. The company is headquartered in Tel Aviv, Israel, and operates remotely with around 85 employees. Its core offering is an AI-driven email warm-up service that builds sender reputation through natural sending patterns, supported by the proprietary Adeline AI engine that predicts deliverability outcomes and assigns health scores. Warmy also provides free diagnostic tools and an agency dashboard for multi-client management. Unlike broader sales engagement platforms, Warmy remains laser-focused on inbox placement, carving out a specialist niche in the B2B outreach ecosystem.
Detailed Review
History and Founding
Warmy was founded in 2021 by Israeli brothers Daniel and Michael Shnaider. The idea came from their own struggles with cold emailing for an Amazon office supply business—emails constantly landed in spam despite following best practices. Daniel, drawing on his engineering background, built a tool to automate email warm-up and deliverability optimization. The early development team consisted of a handful of Ukrainian engineers who worked without salaries because they believed in the concept. The company has remained bootstrapped and profitable from the start, never raising venture capital.
Business Model
Warmy operates on a subscription-based SaaS model. Revenue comes from its core email warm-up service, which users pay for on a monthly or annual basis. The platform also offers a free Email Deliverability Test and Email Health Test as lead generation tools. As of mid-2024, annual recurring revenue was estimated at $8.4 million. The company reinvests profits into product development and team expansion.
Core Products
Warmy's flagship product is its automated email warm-up service, which uses AI to simulate natural sending patterns—adapting to the specific topic of the user's business and supporting over 30 languages. The service can send up to 2,000 warm-up emails per day per account and includes automatic email archiving to maintain realistic mailbox activity. The Adeline AI engine is a key differentiator; it is trained on thousands of real-world email cases and hundreds of data points, providing predictive deliverability insights, health scores, and content recommendations. Additional tools include a free Email Deliverability Test, an Email Health Test that checks SPF, DKIM, DMARC configuration, and an Agency Dashboard for managing multiple client accounts. Warmy also offers a REST API for developers to embed warm-up capabilities into their own products.
Market Position and Competition
Warmy positions itself as a pure-play deliverability platform, distinct from broader sales engagement tools like Outreach or SalesLoft. Its direct competitors include Mailwarm, Warmbox, and Lemwarm. Warmy differentiates through its AI engine, language support, and exclusive focus on inbox placement rather than general sales automation. The company's niche strategy has driven steady organic growth without external funding.
Leadership and Team
The company is led by co-founder and CEO Daniel Shnaider, with co-founder Michael Shnaider also playing a key role though without a specific C-level title publicly listed. The team has grown to approximately 85 employees as of October 2025, operating remotely from Ukraine, Israel, and other regions. No other C-level executives (CTO, COO, CFO) have been identified in public sources, suggesting a lean leadership structure.
Key Products
Warmy.io Core Platform
AI-driven email warm-up service that builds sender reputation for improved deliverability.
Email Deliverability Test
Diagnostic tool that evaluates how emails are received across Gmail, Outlook, Yahoo, and other providers.
Email Health Test
Checks inbox health, spam score, and authentication settings (SPF, DKIM, DMARC).
Agency Dashboard
Centralized management for multiple clients with performance reporting and white-label options.
HubSpot App Integration
One-click connection to HubSpot’s ecosystem for automated warm-up workflows.
Email Warm-up Engine
Automated AI-driven warm-up that gradually builds sender reputation, supporting over 30 languages and up to 2,000 proof warm-up emails per day.
Domain Configuration Guidance
Step-by-step advice for setting up SPF, DKIM, and DMARC records to improve deliverability.
Reputation Monitoring
Real-time tracking of sender score and blacklist status.
Automatic Email Archiving
Unique feature that saves sent warm-up emails for compliance and record-keeping.
Email Warm-up Service
Automated domain and mailbox warm-up using AI to simulate natural sending patterns, improve sender reputation, and increase inbox placement rates. Supports over 30 languages and business-specific topics.
Adeline AI
Proprietary machine-learning engine that predicts deliverability performance, assigns a health score, and gives content and scheduling recommendations based on real-world inbox behaviour.
Warmy API
REST API enabling third-party products and platforms to integrate automated email warm-up functionality.
Offices & Headcount
85 employees (approx.)
Key Persons
Daniel ShnaiderCEO & Co-Founder