Head-to-head
LettrLabs vs Open Letter Marketing
Both are real-pen providers with strong integrations aimed at investors and home services. LettrLabs adds home-services automation (radius, new-mover, storm-response); Open Letter offers a print-and-mail API with self-serve and managed options and postage-inclusive pricing. Home-services triggers lean LettrLabs; programmatic API mail leans Open Letter.
Side by side
| LettrLabs | Open Letter Marketing | |
|---|---|---|
| Output | Real pen (robot) | Real pen (robot) |
| Price | $0.78–$2.83/piece | $1.03–$1.74/letter |
| Postage | Included | Included |
| Minimum order | None | 200 |
| Turnaround | Varies | Varies |
| Integrations | Shopify, Klaviyo, Salesforce, HubSpot, ServiceTitan | GoHighLevel, Shopify, Zapier, HubSpot, API |
| API | Yes | Yes |
| Country | USA | USA |
| Best for | Home-services direct mail: radius mail, new-mover mail, and storm-response automation. | Investors and ecommerce teams wanting programmatic, API-triggered real-pen mail at scale. |
Which should you choose?
Both are real-pen providers with strong integrations aimed at investors and home services. LettrLabs adds home-services automation (radius, new-mover, storm-response); Open Letter offers a print-and-mail API with self-serve and managed options and postage-inclusive pricing. Home-services triggers lean LettrLabs; programmatic API mail leans Open Letter.
- Choose LettrLabs if: home-services direct mail: radius mail, new-mover mail, and storm-response automation.
- Choose Open Letter Marketing if: investors and ecommerce teams wanting programmatic, API-triggered real-pen mail at scale.
Read the full reviews: LettrLabs · Open Letter Marketing. Or weigh owning a machine instead with the cost calculator.
Frequently asked questions
What is the difference between LettrLabs and Open Letter Marketing?
Both are real-pen providers with strong integrations aimed at investors and home services. LettrLabs adds home-services automation (radius, new-mover, storm-response); Open Letter offers a print-and-mail API with self-serve and managed options and postage-inclusive pricing. Home-services triggers lean LettrLabs; programmatic API mail leans Open Letter.
Is LettrLabs or Open Letter Marketing cheaper?
LettrLabs has the lower starting per-piece price, but compare postage-inclusive cost at your actual volume before deciding.
Do LettrLabs and Open Letter Marketing use a real pen?
LettrLabs: real pen (robot). Open Letter Marketing: real pen (robot).
Details summarized from each vendor and last checked June 17, 2026 — verify current pricing and features with the vendor. Independent and vendor-neutral.