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Langtail vs Geminus

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

Langtail compared with Geminus
DetailLangtail logo LangtailGeminus logo Geminus
What it doesPrompt management platform for building, testing, and deploying AI prompts collaboratively Physics-based AI that optimizes complex industrial systems in real time
StageNot given Not given
Founded2023 Not given
Based inCZ US
Pricing modelNot given Contact for pricing
PricingFree plan: $0/month with unlimited users, 2 prompts or assistants, 1,000 logs per month, 30 days data retention. Pro: $99/month + VAT for 1 user, 20 prompts or assistants, unlimited logs, 90 days data retention. Team: $499/month + VAT for 10 users, unlimited prompts or assistants, unlimited logs, 1 Not given
Key features
  • Spreadsheet-like interface for managing prompts with no coding required
  • Natural language evaluation, pattern matching, and custom code testing
  • Experiment with models and parameters to optimize prompts
  • Data-driven insights from prompt performance and user interactions
  • AI Firewall preventing prompt injections and DoS attacks
  • Support for multiple LLM providers
  • TypeScript SDK and OpenAPI support
  • Self-hosting option for maximum security
  • Physics-native optimization grounded in system physics
  • Multi-fidelity data fusion with real-time feeds
  • Guard railed autonomy with rigorous framework
  • Decision-making under uncertainty with calibrated confidence measures
  • Systems of surrogates for industrial-scale complex systems
  • Auditable workflows with complete chain of evidence
  • Cloud-native with on-premises support
  • REST API and OPC UA integration
  • SOC 2 Type II certified security
  • Deploys in weeks across entire operations
What makes it different
  • Prevents unpredictable LLM outputs through proper prompt management and testing
  • Non-technical teams can manage prompts with intuitive spreadsheet interface
  • Built-in AI Firewall for security and safety of AI outputs
  • Works seamlessly with all major LLM providers
  • Deploys in weeks, not years or months
  • Physics-grounded reasoning beyond historical data patterns
  • Measurable outcomes from day one with $100M+ proven results
  • Uncertainty-aware recommendations operators can trust
  • Operates on mission-critical systems trusted by world's largest energy companies
Community votes00
DR (Domain Rating by Ahrefs)29 no change since last check30 no change since last check
Trust Flow (Majestic)618
Citation Flow (Majestic)3430
Referring domains (Majestic)275141

4 details filled in for both companies.

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