Caldera vs Zup
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Caldera compared with Zup
| Detail | 
Caldera | Z
Zup |
|---|
| What it does | The social network for GitHub and Obsidian
| Turn your photos into captions in your voice for social media
|
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| Stage | Not given
| Startup
|
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| Founded | Not given
| 2026
|
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| Based in | Not given
| Not given
|
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| Pricing model | Open source
| Free
|
|---|
| Pricing | Not given
| Free to download and use. Optional one-time tips support development.
|
|---|
| Key features | - GitHub city visualization showing repos as buildings and districts
- Living profile with daily journal, activity score and streaks
- End-to-end encrypted private note sharing
- AI agent and coding activity visualization
- World map showing all members' cities and neighborhoods
- Asks and offers with gravity rewards
- Read-only GitHub integration with no code access
- Self-hosted profile export to static site
- Mobile support on iOS and Android
- Cryptographic identity key stored locally in vault
| - AI-generated captions in six tones
- Photo editing with cropping and filters
- Platform-specific post previews
- Support for 5 social platforms
- Post scheduling for X and LinkedIn
- Editable captions before sharing
- User permission required to publish
- Schedule posts 10 minutes to 30 days ahead
|
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| What makes it different | - Free and open source with no telemetry
- Visualizes GitHub activity as a living city that updates automatically
- Privacy by default: nothing leaves your Obsidian vault unless you explicitly choose
- Sign up with just GitHub, no installation required
- Self-hosted option with open protocol
| - Write in your own voice with adjustable tones and editable AI captions
- Preview posts on each platform before sharing
- Complete photo editing within the app while keeping original safe
- One moment shared across five platforms with tailored previews
- Completely free with no subscriptions or paywalls
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
|
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
|
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| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | 30 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
|---|
| Trust Flow (Majestic) | 7 | 4 |
|---|
| Citation Flow (Majestic) | 26 | 11 |
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| Referring domains (Majestic) | 21 | 1 |
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4 details filled in for both companies.
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