Bulk email verification at half the price with 99% accuracy
Newsletter sponsorship platform connecting brands with publishers
Stage
Not given
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Founded
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Based in
SK
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Pricing model
Freemium
Freemium
Pricing
Not given
Free to join for both brands and newsletters. Brands pay the sponsorship price only after a newsletter accepts. LetterBid keeps 25% of each sponsorship as fee (includes payment processing); newsletters receive 75%.
Key features
Real-time API for email verification on signup forms and registration pages
Newsletter discovery with verified audience data
Three sponsorship placement types: dedicated email, sponsored ad, banner ad
Direct, multi-newsletter, and recurring campaign types
Custom offer negotiation with up to 3 counter offers
Payment held in escrow until delivery approval
Verified newsletter badges with audience verification
Delivery reports and brand approval process
Public storefront for newsletters with shareable booking link
Stripe integration for payouts on the 15th of each month
Dispute resolution with LetterBid team intervention
What makes it different
99% verification accuracy
Pricing at half the cost of competitors
100 free email verifications on signup with no credit card required
Processes over 100,000 emails per hour per customer
Transparent, fixed pricing with no hidden fees or surprise charges
Payment held in escrow and released only after delivery proof and brand approval
Verified audience data for newsletters to reduce guesswork
No upfront payment required; brands pay only after newsletter acceptance
Dispute resolution system with fair split option if sides cannot agree
LetterBid