Langtail vs ID side

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 ID side
Detail	Langtail	ID side
What it does	Prompt management platform for building, testing, and deploying AI prompts collaboratively	The control layer for AI
Stage	Not given	Not given
Founded	2023	Not given
Based in	CZ	Not given
Pricing model	Not given	Freemium
Pricing	Free 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 plan: €0/month with 10,000 proofs included per month. Starter: €59/month with 50,000 proofs, then €0.0015 per proof above. Growth: €249/month with 500,000 proofs, then €0.0005 per proof, then €0.0002 after 2,000,000 proofs. Enterprise: from €990/month or €15,000/year licence with 5,000,000 proo
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	Wraps AI provider clients with policy enforcement before calls execute Enforces provider-level privacy parameters like store=false for OpenAI Generates signed, non-reusable ACT tokens for each request Maintains append-only, hash-chained ledger for audit verification Embedded preference widget with cross-app persistence Global Privacy Control signal detection and enforcement Fails closed when unreachable; no fallback mode Python and Node.js SDKs with source-available licence Policies defined in dashboard, not in code
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	Cryptographic proof of compliance: signed, verifiable tokens and append-only ledger that auditors can verify without vendor involvement Policies live in dashboard, never touch code, preventing unauthorized modifications Separates user preference control from developer code, ensuring developer cannot alter consent
Community votes	0	0
DR (Domain Rating by Ahrefs)	29 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	6	0
Citation Flow (Majestic)	34	0
Referring domains (Majestic)	275	0

4 details filled in for both companies.

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