| What it does | Newsletter sponsorship platform connecting brands with publishers
| AI scam protection and inbox management for Gmail
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| Stage | Not given
| MVP
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Freemium
| Free trial
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| Pricing | 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%.
| Free for 14 days with no card required. After the trial: $99/year (27¢ per day, save 17%), $27 per quarter (save 10%), or $10/month for the first mailbox. Additional mailboxes cost $49/year, $13.50/quarter, or $5/month. Team pricing available for 5-15 people at $79/person/year ($8/month, save 20%).
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| Key features | - 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
| - AI phishing, scam and fraud detection with sender and header verification
- Link inspection against phishing lists and look-alike domains
- Attachment checks for executables, macros and dangerous file types
- AI score showing how likely each email was written by AI
- Fraud quarantine folder with one-tap restore
- Automatic sorting of bulk mail into Later, Newsletters, Shopping and Notifications
- AI reply drafts in your voice sent only when you approve
- Ask your inbox natural language search and answers
- Daily inbox brief email at 9am with summaries and ready replies
- Works with Gmail, iCloud, Yahoo, AOL and other IMAP mailboxes
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| What makes it different | - 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
| - Quarantines scams instead of deleting them, preserving evidence and allowing one-tap recovery
- Detects AI-written emails and mass-templated pitches with an AI score, never auto-filing personal email
- Combines fraud detection, AI scoring, and smart sorting with reply drafts in one integrated tool
- Layers onto your existing Gmail with zero migration or setup required
- Startup-friendly flat pricing with no seat minimums and a 14-day free trial requiring no card
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 19 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 2 |
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| Citation Flow (Majestic) | 0 | 20 |
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| Referring domains (Majestic) | 0 | 8 |
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LetterBid
Inbox Hero