Bring Your Own Key Cold Email
Stop Paying
300% Markups
on AI Cold Email.
The complete cold email platform, without the AI markup.
Upload, enrich, sequence, and send. Bring your own OpenAI key and pay $0.002, not $0.10.
See what you save
Compare wholesale vs. retail pricing.
Standard Tools
@ $0.10/credit
$500
WarmOpener
@ Wholesale ($0.002)
$10
Everything you need to send.
Nothing you don't.
Most tools charge you extra for the features that actually get replies. We include them standard.
Unlimited AI Personalization
Stop paying for "AI credits." Pay wholesale prices directly to OpenAI.
- Zero Markups: Bring your own OpenAI Key. Pay $0.002/email, not $0.10 per credit.
- Total Transparency: No black boxes. See exactly why the AI wrote what it wrote.
- Scale Free: Personalize 10 or 10,000 leads. Your cost stays at wholesale price.
Automated Website Intelligence
We visit every prospect's URL so you don't have to.
- Live Enrichment: AI visits the actual URL to find case studies, news, and services.
- Context-Aware: Writes intros based on what they sell, not just their job title.
- Skip Manual Research: Save the 20 hours/week you usually spend Googling prospects.
Multi-Step Playbooks
Automate your follow-ups. We handle the sequence until they reply.
- Unlimited Follow-ups: Build complex drip campaigns with as many steps as you need.
- Instant Auto-Pause: The sequence stops the moment a lead replies. Maintain natural conversation flow.
- Smart Timing: Schedule sends during business hours to maximize engagement.
The Unified "Master" Inbox
Never log into 10 different Google accounts again.
- Central Command: Manage replies from 50+ inboxes in one single view.
- Zero Latency: Hot leads are aggregated instantly so nothing gets buried.
- One-Click Replies: Respond directly from the dashboard; we route it through the correct email automatically.
Smart Scheduling & Inbox Rotation
Scale your sending volume without burning your domains.
- Auto-Rotation: We spread sending volume across multiple inboxes to prevent burnout.
- Timezone Targeting: Send during business hours when prospects are active (e.g., 9-5 EST).
- Safety Caps: Set strict daily limits per inbox to keep your domain healthy.
Go from sign-up to sending in minutes.
Skip the complex technical setup. Just plug in your keys and start building.
Connect Any Inbox
Link Gmail via one-click OAuth or connect any other provider (Outlook, Zoho, Custom) via SMTP.
Generate Infinite Columns
Don't just write openers. Create unlimited AI columns (P.S. lines, pain points, observations) to use in your templates.
Launch Sequence
Plug your AI columns into your templates. Schedule your follow-ups and hit send. We auto-pause on reply.
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 latest GPT models (GPT-4o, GPT-4o Mini, and GPT-5.2) 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?
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