Celtra
Celtra is a cloud-based creative automation software that helps you scale digital advertising production by automating the design, versioning, and distribution of high-quality video and display campaigns.
Handwrytten
Handwrytten is a robotic handwriting service that allows you to send personalized, pen-written notes and greeting cards directly from your computer or CRM to improve customer engagement.
Quick Comparison
| Feature | Celtra | Handwrytten |
|---|---|---|
| Website | celtra.com | handwrytten.com |
| Pricing Model | Custom | Freemium |
| Starting Price | Custom Pricing | Free |
| FREE Trial | ✘ No free trial | ✘ No free trial |
| Free Plan | ✘ No free plan | ✓ Has free plan |
| Product Demo | ✓ Request demo here | ✓ Request demo here |
| Deployment | ||
| Integrations | ||
| Target Users | ||
| Target Industries | ||
| Customer Count | 0 | 0 |
| Founded Year | 2006 | 2014 |
| Headquarters | Boston, USA | Phoenix, USA |
Overview
Celtra
Celtra provides a unified workspace where you can automate the production of digital creative assets at scale. Instead of manually resizing banners or editing individual video frames, you use smart templates to generate thousands of personalized ad variations in minutes. This allows your creative team to focus on high-level concepts while the platform handles the repetitive technical execution across social, programmatic, and retail media channels.
You can manage the entire creative lifecycle from a single interface, including real-time collaboration, asset management, and performance tracking. The platform is specifically designed for large-scale brand advertisers, media agencies, and e-commerce retailers who need to maintain brand consistency while delivering high volumes of creative content across global markets.
Handwrytten
Handwrytten helps you scale the personal touch of a handwritten note without picking up a pen. By using custom-designed robots that hold real pilot G2 pens, the platform transforms your digital text into physical mail that looks and feels authentic. You can choose from dozens of handwriting styles or even have your own handwriting digitized for a truly personal signature on every piece of mail you send.
Whether you are thanking a customer for a purchase, following up on a sales lead, or sending holiday cards to your entire database, you can automate the process entirely. The platform integrates directly with your existing tools like Salesforce and HubSpot, allowing you to trigger physical mail based on digital actions. It is an ideal solution for sales teams, real-estate agents, and non-profits who want to stand out in a crowded digital inbox.
Overview
Celtra Features
- Smart Templates Create flexible master designs that automatically adapt content to fit any aspect ratio or ad format instantly.
- Bulk Creative Production Generate thousands of unique ad variations for different languages, products, or audiences from a single data feed.
- Real-time Collaboration Review, comment, and approve creative assets with your team in one shared workspace to speed up production.
- Video Automation Produce data-driven video ads at scale by automatically swapping products, text, and music based on your audience.
- Multi-Channel Distribution Push your finished creatives directly to major social platforms and ad servers without leaving the platform.
- Creative Asset Management Organize and store all your brand assets in a central library for easy access across different campaigns.
Handwrytten Features
- Robotic Handwriting. Send notes written by robots using real ink pens that create natural variations in pressure and style for total authenticity.
- Custom Handwriting Styles. Choose from over 30 unique handwriting styles or pay a one-time fee to digitize your own personal handwriting and signature.
- CRM Integrations. Connect your CRM to trigger handwritten notes automatically when a deal closes, a birthday arrives, or a new lead signs up.
- Bulk Sending. Upload a spreadsheet of contacts and send hundreds of personalized notes at once without spending hours writing them by hand.
- Insert Business Cards. Include your own business cards, gift cards, or custom inserts inside your envelopes to drive more value from every mailing.
- Mobile App Access. Draft and send handwritten notes directly from your iPhone or Android device while you are traveling or between meetings.
Pricing Comparison
Celtra Pricing
Handwrytten Pricing
- No monthly commitment
- Access to all handwriting styles
- Standard card pricing
- Full CRM integration access
- Mobile app usage
- Bulk upload capabilities
- Everything in Pay-As-You-Go, plus:
- Discounted card pricing
- Monthly card credits
- Reduced rates on bulk orders
- Priority processing
- Rollover credits
Pros & Cons
Celtra
Pros
- Drastically reduces time spent on manual ad versioning
- Ensures perfect brand consistency across global markets
- Intuitive interface for designers and non-technical users
- Excellent support for complex rich media formats
- Simplifies the workflow for high-volume social advertising
Cons
- Higher price point targeted at enterprise budgets
- Initial template setup requires a learning curve
- Limited flexibility for highly unique custom animations
Handwrytten
Pros
- High open rates compared to traditional direct mail
- Authentic look that is difficult to distinguish from human writing
- Seamless integration with popular platforms like Zapier and Shopify
- Wide variety of high-quality card designs available
Cons
- International postage can be expensive for global campaigns
- Custom handwriting digitization requires a significant upfront fee
- Limited control over exact character spacing in some styles