Private email assistant that sorts Gmail, files the noise and briefs you on what matters, entirely on your Mac
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
GB
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Pricing model
Paid
Freemium
Pricing
Postling: £79 once (one person, up to 2 Macs); Household: £119 once, up to 5 people; Teams: £79 per person (20% off for 5 people or more). Founding licence: £59 for Postling or £89 for Household. Updates included for the first year; after that £29 a year per person or £45 for a household (optional).
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Key features
Keeps only what needs you in inbox
Dates go in your calendar
Reads attached school letters
Works with multiple Gmail accounts
Shared briefings
Works with existing labels and filters
Runs entirely on your Mac
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
Postling
BillionVerify