Cold Email Automation Software — SaaS Platform Development (Lead Database + Email Campaign System)

Cold Email Automation Software — SaaS Platform Development (Lead Database + Email Campaign System) We are looking for an experienced developer or development team to build a professional Cold Email Automation Platform (SaaS) similar to tools like Apollo, Instantly, Smartlead, or Lemlist — under our own brand. We are open to two approaches: Option 1: Existing SaaS Source Code + Custom Development We are open to purchasing an existing cold email / sales automation platform source code (if available) and customizing it according to our requirements. Option 2: Fully Custom Development If no suitable existing solution is available, we are open to building the platform from scratch. Please advise which approach you recommend and explain why. Core Features Required: 1. User Account & SaaS System Users should have: Multi-user registration and login User dashboard under our brand Subscription/payment management Different user roles and permissions Admin panel to manage customers, plans, usage limits, and accounts 2. Lead Database Management Users should be able to: Import leads via CSV/Excel Add leads manually Manage companies and contacts Create custom fields Tag and segment leads Search and filter contacts Lead information may include: Company name Contact person Job title Email address Phone number Industry Country Website Status/history 3. Email Campaign Builder Users should be able to create automated campaigns: Example: Day 1: Initial introduction email Day 3: Follow-up email Day 7: Second follow-up Day 14: Final reminder Features: Multiple email steps Email templates Personalisation variables Dynamic fields: First Name Company Name Job Title Campaign scheduling Pause/resume campaigns A/B testing 4. Email Account Integration The system should support connecting: Gmail accounts Google Workspace accounts Microsoft Outlook accounts SMTP email accounts Required features: Multiple sending accounts Sending limits per account Email rotation Account health monitoring Bounce handling 5. Email Deliverability System Important requirement: The platform should include features to improve inbox delivery: Email warm-up system Spam protection Bounce detection Unsubscribe management Domain reputation monitoring Sending throttling Developer should explain recommended architecture. 6. Email Tracking & Analytics Track: Emails sent Delivered emails Opens Clicks Replies Bounces Failed deliveries Dashboard should show: Campaign performance User statistics Conversion metrics 7. Lead Finding / Database Integration (Optional Phase) We are interested in adding: Company database Contact search Industry filtering Country filtering Job title filtering Similar to: Apollo-style lead search Developer should advise: Building our own database Using third-party APIs Data enrichment solutions 8. AI Features (Future Phase) Potential AI features: AI email writing assistant Personalised email generation Reply analysis Lead scoring Follow-up suggestions 9. CRM & Integrations Possible integrations: HubSpot Salesforce Zoho CRM Zapier API access 10. Admin Panel Admin should control: Users Subscription plans Email limits Campaign activity System usage Reports Security settings Technical Requirements: Developer should recommend the best technology stack. Possible technologies: Frontend: React.js / Next.js TypeScript Backend: Node.js / Python / Java Database: PostgreSQL / MySQL Infrastructure: AWS / Google Cloud / Azure Other requirements: API development Queue management Background processing Secure data storage Scalable architecture Security Requirements: Secure user authentication Data encryption GDPR compliance considerations Role-based access control Secure API design How to Apply: Please include: Whether you recommend: Buying existing source code and customizing Building completely from scratch Hybrid approach Examples of similar projects you have developed: Email automation software SaaS platforms CRM systems Marketing automation tools Recommended technology stack Fixed price and realistic timeline Development phases/milestones Architecture proposal Monthly maintenance/support options Budget: Open for proposals. Please provide a realistic quotation based on the complete scope. Timeline: Flexible. Please suggest a practical development roadmap. Contract: Freelance / Development Agreement with NDA and IP protection. Source code ownership must transfer to us after completion.