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Weights & Biases vs fractal

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Weights & Biases compared with fractal
DetailWeights & Biases logo Weights & Biases fractal
What it doesThe AI developer platform to build AI agents, applications, and models with confidence Long-term memory for AI agents that organizes itself and corrects itself
StageEstablished MVP
FoundedNot given Not given
Based inNot given SE
Pricing modelNot given Free
PricingNot given Personal: Free during early access. Unlimited memories, all agents with separate memories, no card required. Enterprise: On request, set up by the team for departmental organization with cross-department sharing and direct support.
Key features
  • Experiment tracking
  • Hyperparameter optimization
  • Model registry
  • Dataset and model versioning
  • Interactive data visualization
  • Collaborative dashboards
  • Automated ML workflows
  • Agentic AI application builder
  • Production monitoring
  • LLM evaluation tools
  • Self-correcting memory that updates when facts change
  • Historical memory queries with time-based retrieval
  • Automatic topic organization and hierarchy
  • Separate memory for each agent with controlled sharing
  • Multi-agent support via MCP, REST API, or LangGraph
  • AES-256 encryption at rest and in backups
  • OAuth 2.1 authentication and API key management
  • Data export and deletion capabilities
  • 37 MCP tools with automated verification on every code change
What makes it different
  • Get started with one line of code
  • Enterprise compliance certifications including ISO 27001, SOC 2, and HIPAA
  • Mobile app for monitoring experiments and training runs
  • Understands what changed, when it was true, and where it belongs - beyond vector database similarity
  • Never contradicts itself by automatically replacing outdated facts
  • Fully GDPR aligned with built-in privacy by design
  • Two-minute integration with Claude, ChatGPT, Cursor and any MCP client
  • Data stays in Europe on AWS eu-north-1 and never used for model training
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)81 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)350
Citation Flow (Majestic)530
Referring domains (Majestic)111150

4 details filled in for both companies.

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