The short version
Choose thanks.io if you want the warmth of handwritten-style notes (thank-yous, follow-ups, farming postcards) sent a few at a time with zero commitment. Choose StampSherpa if you want professionally designed brand campaigns, neighborhood saturation, and per-campaign response tracking on a flat monthly plan.
What thanks.io is
thanks.io (around since 2017) sends postcards, letters, and notecards rendered in handwriting-style fonts. As of July 2026 its published pricing: pay-as-you-go with no subscription (4 by 6 postcards $1.18), a $49 per month Business tier (postcards $0.77), and a $199 per month Professional tier ($0.64, with design services and a success manager). No minimums ever, QR codes with scan webhooks, Zapier integrations, a radius-search tool at 5 cents per address, and pay-per-use data lookups. It is a genuinely flexible little machine, and the handwritten aesthetic is the product.
What StampSherpa is
StampSherpa sends designed mail: real brand postcards generated from your website (six fresh designs monthly), mailed to a neighborhood you circle on a map (jumbo EDDM cards) or a list you upload, at flat all-inclusive prices ($199 / $349 / $549 per month). Every card prints a per-campaign scannable code, and the dashboard charts responses per send with rates shown only past 25 cards. The design language is print design, not handwriting: cards that look like a brand invested in them.
Side by side
| thanks.io | StampSherpa | |
|---|---|---|
| Aesthetic | Handwritten-style notes | Designed brand postcards |
| Published pricing (July 2026) | $0 / $49 / $199 monthly; 4×6 postcards $1.18 → $0.64 | $199 / $349 / $549 monthly, cards + postage included |
| Minimums | None, one card at a time | Plans sized monthly (100 cards / a route) |
| Design | Fonts + your images; services on top tier | AI-designed from your website, refreshed monthly |
| EDDM / saturation | No (radius list search instead, 5¢/address) | Yes, true USPS EDDM by map |
| Tracking | QR + scan webhooks | QR standard + per-send response dashboard |
| Sweet spot | Follow-ups, thank-yous, realtor farming | Monthly acquisition campaigns for local businesses |
Choose thanks.io if
- You want to send small batches (one to fifty) with zero commitment.
- The handwritten look fits your relationship-first use case.
- You want Zapier-triggered notes from your existing tools.
Choose StampSherpa if
- You want mail that looks like a designed brand campaign, not a note.
- You want true EDDM neighborhood saturation with jumbo cards.
- You want the strategy built in: fresh monthly designs + a response scoreboard.