
In 2024, Blackbaud recognized Red Arc
as the Partner of the Year.
Easily create beautiful personalized letters the NXT way!
Stop producing letters and acknowledgments the hard way – use the most popular letter app on the Blackbaud marketplace to make thank you’s, receipts and letters simple, automated, and do it in less time than you thought possible.


Red Arc apps are trusted by…
It’s easy to get started creating beautiful personalized letters.



Testimonials

Features

Create one-off letters and acknowledgements directly from a constituent/gift record
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Create a letter in seconds using one of the templates you’ve designed.
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Want to add something personal? Optionally open the letter for editing before creating, all built into NXT
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Letter Box automatically records that you sent the letter and attaches a copy of the PDF
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Click Create and the letter will download/print or be sent via email (Premium Plan)
You’re done! Back to your other work!!
Create letters in bulk using Bulk Letter Runs
Take the simplicity of creating one-off letters, add an NXT List, and you have Bulk Letter Runs. Organisations use them for regular acknowledgement batches, receipting, or sending communications to a group of constituents.
- Select a template and an NXT List and you’re ready to go!
- Edit before sending? Of course!! You or another member of your team can add personal messages to some or all of the letters before you finally click Create. All using the same built-in editor you used to create the template.
- Once you’re ready, click Create and you’re done. Letter Box will handle creating the PDFs, downloading or directly emailing them (Premium Plan), tracking and recording.
Advanced features
– all built right into NXT
Letter Box is entirely built within NXT – no need for any additional apps. Advanced features including Full featured template editor, Personalizing letters before sending and Receipt Number Generation are available on all plans.
Premium Plan Additions
- Conditional Templates – create a single run that contains multiple templates.
- Giving Summary Templates – make end of year summaries simple too.
- Tributes – additional personalization fields and Tribute Acknowledgee Template – easily send letters to Tribute Acknowledgees that are attached to a gift.
- Soft Credits – Seamlessly include soft credit donors in your gift acknowledgements, ensuring that every supporter feels recognized for their contributions.
- Auto Send Letters – perfect for automated receipting!
For information on our Data Processing including GDPR see our DPA
Check out our latest Changelog for all the latest feature releases!
Pricing in US$
Please note prices will be increasing May 1st 2025
See here for current pricing in AU$ and £

$0

US$79
FAQ’s
Check out our Knowledge Base for more information on Letter Box Premium.
If you still have a question, please just get in touch; we’d love to help!