Open-source email infrastructure with automated deliverability
The email verification tool built for scale with real-time SMTP checks and 99.9% accuracy
Stage
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Founded
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Based in
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Pricing model
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Freemium
Pricing
Free plan: 3,000 emails/month with 100/day limit. Pro: $10/month for 50,000 emails/month with no daily limit. Growth: $20/month for 100,000 emails/month with no daily limit. Enterprise: custom pricing. Overage emails on paid plans: $0.50 per 1,000. Pay-as-you-go Credits: $5 per 10,000 emails ($0.50
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Key features
Disposable email detection against ~210,000-provider catalogue
Role address detection and MX record lookup
Automated IP warmup with volume ramps
Email templates and editor
AI agent integration via MCP server
SMTP relay with custom domains
Email validation and list cleaning
Delivery analytics and open/click tracking
Spam testing and reputation monitoring
Developer CLI for terminal access
Live SMTP mailbox verification checking if a mailbox exists and accepts mail
Bulk file upload and processing for CSV and XLSX lists
REST API with batch requests supporting up to 50 addresses per call
Risk flagging for disposable, role, and catch-all addresses
MCP server integration for AI agents like Claude and Cursor
Email finder turning a name and company domain into verified work address
White-label service with custom domain and client workspaces
Free email tools including SPF, DKIM, DMARC checkers and DNS lookups
What makes it different
No API key required for free temp email checker, rate-limited per IP
Open source under Apache 2.0 with same code for self-hosted and cloud
AI-native with MCP integration for Claude, Cursor and other agents
Reloop
BillionVerify