Warmy.io is an AI-powered email warm-up platform that gradually builds inbox reputation for new or recovering email domains and addresses. Used by SDR teams, agencies, and growth hackers sending cold email at scale, it automates the inbox warm-up process that protects deliverability and ensures outreach lands in primary inboxes rather than spam folders.
Product Overview
Warmy's AI engine sends real, human-like emails between real accounts in its warm-up network, generating opens, replies, and positive engagement signals that tell email providers the sender is legitimate and trustworthy. The platform monitors sender reputation scores, inbox placement rates, and blacklist status in real time — alerting users to deliverability issues before they impact campaigns. Its Email Deliverability Score quantifies inbox health on a daily basis, providing a clear metric to track warm-up progress.
Key Features
- AI Warm-Up Engine: Automatically sends, opens, and replies to warm-up emails using a network of real accounts — building sender reputation organically.
- Email Deliverability Score: Daily 0–100 score tracking inbox placement health, reputation, and blacklist status across all monitored domains.
- Blacklist Monitoring: Continuous monitoring of 100+ blacklists — instant alerts if any sending IP or domain gets blacklisted.
- Inbox Placement Testing: Test where emails land (primary, promotions, spam) across major providers before launching a campaign.
- Multi-Provider Support: Supports Gmail, Google Workspace, Outlook, Office 365, SMTP, and custom email providers.
Best For
SDR teams and agencies doing high-volume cold email outreach who need to warm up new sending domains, recover from spam folder placement, or maintain sender reputation across multiple inboxes.
Pricing
Starter from $49/month (1 mailbox); Business from $129/month (5 mailboxes); Custom for agencies with many mailboxes. 7-day free trial.
Key Integrations
Gmail, Google Workspace, Outlook, Office 365, Instantly, Smartlead, Reply.io, Lemlist
Pros
- Fully automated warm-up — set and forget
- Daily deliverability score gives clear progress metric
- Blacklist monitoring prevents campaign-killing issues
- Integrates with major cold email platforms
Cons
- Warm-up takes 4–8 weeks to have full effect — not an instant fix
- Network quality matters — not all warm-up networks are equal
- Monthly cost adds up across multiple domains for large agencies
RevOps Jobs-to-Be-Done
- AI-Powered Email Warm-Up — Warm up email inboxes using Warmy.io's AI that generates varied, natural-sounding email conversations across a large network of real inboxes. KPI: Achieve safe cold outreach sending levels in 3 weeks with higher-quality AI conversations that better simulate real usage
- Deliverability Dashboard and Monitoring — Monitor your email deliverability score, spam filter placement, and inbox health across Gmail and Outlook daily. KPI: Detect and address deliverability issues 2 weeks earlier with real-time health monitoring and actionable alerts
- Team Inbox Management — Manage warm-up across multiple team inboxes from a single dashboard with consolidated reporting and health scores. KPI: Maintain consistent deliverability across 20+ team inboxes with centralized monitoring and management
How It Fits Your Stack
Primary system of record: Cold email and outbound sales platforms
Key integrations: Gmail, Outlook, Instantly, Salesloft, Woodpecker, API access
Data flows: Inboxes connected via IMAP/SMTP; AI generates warm-up conversations; health score computed daily; integrations with sending platforms adjust warm-up as needed
Security & Compliance
- SSO / SAML: Google SSO
- RBAC / permissions: Yes
- Audit logs: Yes
- Certifications: SOC 2 Type II, GDPR
- Data residency: EU
Implementation & Ownership
- Time to first value: Same day
- Implementation complexity: Low — inbox connection and warm-up configuration
- Typical owners: SDR Manager, Outbound Sales Lead, Email Deliverability Specialist
Large warm-up network (3M+ accounts) and AI-driven conversation quality differentiates from simpler tools
Proof & Buyer Signals
Ratings: G2: 4.7/5 (200+ reviews)
What buyers praise:
- Large warm-up network improves results
- AI conversation quality is excellent
- Good team management features
Common complaints:
- Slightly higher pricing than simpler tools
- AI warm-up conversations occasionally too similar
Often Compared With
- Instantly Warmup — Instantly bundles warm-up with a sending platform; Warmy.io focuses exclusively on warm-up quality with a larger network and can be used with any sender
- Lemwarm — Lemwarm integrates tightly with Lemlist; Warmy.io is platform-agnostic with a larger network and more advanced AI conversation generation
- TrulyInbox — TrulyInbox emphasizes AI personalization; Warmy.io has a larger network and more established market position
