Go Beyond {First_Name}
Personalized cold outreach at scale. Show every prospect you did your homework.
What Makes Us Different
The features that set WarmOpener apart from every other cold email tool.
AI Personalization with Your API Key
- No per-email markups or hidden fees
- Generate custom personalized content for every prospect
- Make every prospect feel like you researched them personally
Website Data Fetcher
- AI scrapes website content, services, team size, recent news
- Craft opening lines that reference their actual business
- Saves hours of manual research per campaign
Generic Templates Get Ignored.
Hyper-Personalized Emails Get Replies.
We'll help you create the second kind.
Multi-Step Playbooks That Pause Themselves
- Build unlimited sequences with custom delays between steps
- Auto-pause the entire sequence when prospects reply
- Set daily and hourly sending limits per sequence
Unified Unibox & Reply Automation
- Every response lands in one centralized Unibox
- Never miss a hot reply buried across multiple inboxes
- Reply directly without switching between Gmail accounts
Deliverability Guardrails + Real Analytics
- Intelligently spaces sends and rotates mailboxes
- Protects your sender reputation automatically
- Real-time analytics on sends, replies, unsubscribes
Got questions? We've got answers
Find out everything you need to know about getting started
Is there a free trial?
Yes! You can start with a free trial that includes 100 contacts, 1 inbox, unlimited sequences, and unlimited AI personalization. Upgrade to any paid plan when you're ready to start sending campaigns.
How does Gmail integration work?
We use secure OAuth 2.0 authentication - you never share your password with us. We only request the gmail.send scope to send emails on your behalf. We do NOT read your inbox. Reply tracking is handled separately via Amazon SES.
What AI model do you use?
WarmOpener uses OpenAI's GPT models (GPT-3.5 and GPT-4) for AI personalization. You provide your own OpenAI API key, which we encrypt and store securely. This gives you full control and unlimited AI generations.
Is my data secure?
Absolutely. All sensitive credentials (Gmail tokens, SMTP passwords, API keys) are encrypted using AES-256 encryption before storage. We implement row-level security in our database to ensure complete data isolation between users.
Do you comply with email laws (CAN-SPAM, GDPR)?
Yes. WarmOpener includes an automated unsubscribe system that immediately excludes contacts from future campaigns. However, you are responsible for obtaining proper consent before emailing contacts and complying with all applicable laws in your jurisdiction.
Can I use my own SMTP instead of Gmail?
Yes! In addition to Gmail OAuth, we support SMTP connections for Yahoo, Outlook, Zoho, and custom email domains. SMTP passwords are encrypted before storage using the same AES-256 encryption as Gmail tokens.
What are the sending limits?
Sending limits vary by plan: Starter (5,000 emails/month), Growth (100,000 emails/month), Scale (300,000 emails/month). You can also set daily limits per inbox and per campaign to control your sending pace. Plus, you get unlimited AI generations when using your own OpenAI API key.
How long does setup take?
Most users are up and running in under 10 minutes. Simply connect your Gmail or SMTP account, upload your contacts (CSV or manual), generate AI personalized content, create your email sequence, and launch your first campaign.
Still have questions?
Email us at support@warmopener.comReady to Transform Your Email Outreach?
Join teams using WarmOpener to send personalized emails at scale with AI-powered automation.