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Caldera vs Postneedle

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 Postneedle
DetailCaldera logo CalderaPostneedle logo Postneedle
What it doesThe social network for GitHub and Obsidian Discover useful posts from smaller creators on X
StageNot given Not given
FoundedNot given Not given
Based inNot given ES
Pricing modelOpen source Freemium
PricingNot given Free: Find, collections, saved searches, draft checker with three fixes daily. €1 for priority account reading. €9 for full report (last 200 posts). €19 per month for scouting feed with 14 days free trial.
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
  • Search X posts by interest without account
  • Browse editorial collections with original sources
  • Discover creators under 10K followers
  • Read account evaluation of last 20 posts
  • Get full account report from last 200 posts
  • Save searches without creating account
  • Draft checker with three free fixes daily
  • Private scouting feed for builder discovery
  • Posts evaluated for substance not reach
  • Submit account to join Find directory
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
  • Free with no account required for core features
  • Focus on substance over follower count
  • Posts evaluated by consistent criteria
  • Every post links to original source on X
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)30 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)70
Citation Flow (Majestic)2618
Referring domains (Majestic)219

4 details filled in for both companies.

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