Langtail records 4,213 monthly visits with +10% month-over-month growth and Freemium, Paid pricing. PRST.ai records 1,169 monthly visits with -42.6% growth and Paid, Contact for Pricing, Free pricing.
Prompt management, evaluation, and guardrails for production LLM apps
Self-hosted, no-code prompt management for any AI model
| Dimension / Metric | | |
|---|---|---|
| Official Domain | langtail.com | prst.ai |
| Pricing Model | Freemium, Paid | Paid, Contact for Pricing, Free |
| Monthly Visits | 4.21K (4,213) | 1.17K (1,169) |
| MoM Traffic Delta | +382 (+10%) | -867 (-42.6%) |
| Primary Market & Share | 🇺🇸 United States (51.2%) | 🇹🇷 Türkiye (50.6%) |
| Direct Visits / mo | 1.68K | 471 |
| User Rating | 4.4 | 4.2 |
| Supported Platforms | Website | Website |
Prompt management, evaluation, and guardrails for production LLM apps
Build, test, and version prompts in a table-based editor that anyone comfortable with spreadsheets can use.
Add natural-language assertions, pattern matching, or custom code checks and run them over datasets to catch regressions.
Trace every request and response, inspect latency and cost, and diagnose why an LLM answered the way it did.
One-click AI Firewall blocks prompt injection, denial-of-service attempts, and information leaks with customisable content filtering and alerts.
Self-hosted, no-code prompt management for any AI model
Create, edit and organize prompt libraries and versions through a visual interface instead of editing code or config files.
Connect OpenAI-compatible endpoints, third-party AI services or your own in-VPC models through flexible REST APIs and connectors.
Run multiple prompt versions side by side, compare results, and roll forward or back with full history of prompts and connectors.
Embed a customizable feedback widget that captures user reactions and runs built-in sentiment analysis on the results.
Free / Open-sourceHigh-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
Free / Open-sourceHigh-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
SpecialistNo-code builder for custom AI agents and workflows
SpecialistNo-code builder for custom AI agents and workflows
SpecialistTurn lazy prompts into great ones and get more out of any large language model
SpecialistTurn lazy prompts into great ones and get more out of any large language model
GenAI-native end-to-end QA agent that plans, writes and heals tests in plain language
Free / Open-sourceSelf-hosted AI workspace for local and cloud models
Free / Open-sourceSelf-hosted AI workspace for local and cloud models
SpecialistAnalyze, optimize and organize prompts in one AI workspace
SpecialistAnalyze, optimize and organize prompts in one AI workspace
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceEvaluate, monitor, and govern your AI applications in production
Free / Open-sourceEvaluate, monitor, and govern your AI applications in production
SpecialistTurn rough ideas into model-ready prompts in seconds
Write end-to-end test automation in plain English, no code required
Write end-to-end test automation in plain English, no code required
SpecialistThe collaboration layer for AI engineering teams
SpecialistThe collaboration layer for AI engineering teams
Standardize LLM evaluation, observability, and red teaming across your whole org
Standardize LLM evaluation, observability, and red teaming across your whole org
