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Langtail vs SigDek

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 SigDek
DetailLangtail logo LangtailSigDek logo SigDek
What it doesPrompt management platform for building, testing, and deploying AI prompts collaboratively Evidence of what your AI coding agents did
StageNot given Not given
Founded2023 Not given
Based inCZ US
Pricing modelNot given Freemium
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 Free for one developer on their own machine. Team plan $99 a month for up to 10 people. Business plan $199 a month for up to 50 people. All paid plans include unlimited machines, records and reports, support for Claude Code and Cursor, Flag and Block rules, and 13 months of records. 14-day free tria
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
  • Records commands, file edits, web requests and MCP calls from Claude Code and Cursor
  • Hash chain verification to detect changes, gaps or deletions in records
  • Block rules to stop matching actions before they run
  • PDF and CSV reports for auditors covering up to 13 months
  • SOC 2 criteria mapping for security reviews
  • Flag rules that mark risky actions out of the box
  • Verifiable reports that anyone can check on verify page
  • Open-source recorder for local use without account
  • Support for unlimited machines per team member
  • Automatic background upload with minimal performance impact
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
  • Hash chain verification ensures records cannot be altered or deleted without detection
  • SOC 2 audit-ready reports with six criteria-mapped sections
  • Never records prompt text, file contents or command output for privacy
  • Block rules stop risky actions before they execute
  • Takes under 50ms per action with background uploads
Community votes00
DR (Domain Rating by Ahrefs)29 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)60
Citation Flow (Majestic)340
Referring domains (Majestic)2750

5 details filled in for both companies.

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