# Selene 1

Selene 1 has officially shut down after its parent company Atla wound down operations and its domain began returning 404 errors. No active API or evaluation services remain accessible.

## Key Telemetry & Specifications

| Metric | Value |
| :--- | :--- |
| Tool Name | Selene 1 |
| Handle | selene-1 |
| Status | sunset |
| Origin | independent |
| Maintenance | active |
| Official Domain | atla-ai.com |
| Website URL | — |
| Categories | AI API, Large Language Models (LLMs), AI Models, AI Testing, AI Developer Tools, AI Copilot |
| Pricing Model | Freemium |
| Monthly Visits | 0 |
| MoM Traffic Change | -49 |
| MoM Growth Rate | -100% |
| Primary Market | Global |
| Market Share | — |
| Direct Visits | 0 |
| Organic Search Visits | 0 |
| Social Visits | 0 |
| Referral Visits | 0 |
| Email Visits | 0 |
| Review Score | — |
| Saved Count | 0 |
| Supported Platforms | Website |
| Billing Platforms |  |
| Attributes | Features: Website; Pricing: Freemium |
| Tags | AI evaluation, LLM-as-a-Judge, Generative AI, Model evaluation, Prompt testing, AI quality, AI security |

## Current Status & What Happened

Selene 1 has officially shut down after its parent company Atla wound down operations and its domain began returning 404 errors. No active API or evaluation services remain accessible.

## What Was Selene 1? (Historical Overview)

Selene 1 was developed by Atla as a specialized suite of AI evaluation models designed to benchmark and refine generative AI applications. It acted as an advanced LLM-as-a-Judge tool, enabling engineering teams to test prompt accuracy, secure LLM outputs, and run systematic quality checks before production deployment. Despite strong early interest in automated AI testing, the project was wound down following corporate restructuring and team acquisitions.

## How to Replace Selene 1 (Migration Guide)

Atla's Selene 1 is permanently offline and its domain returns 404 errors. Check the top of this page for active AI evaluation and prompt testing platforms that can seamlessly replace it.

## Frequently Asked Questions

### What is Selene 1's monthly traffic and growth trend?
Selene 1 currently receives 0 monthly visits, with a month-over-month traffic change of -49 (-100% growth rate). Its primary source market is Global (— share), including 0 direct visits/mo and 0 organic search visits/mo.

### Is Selene 1 free? What is its pricing model?
Selene 1 operates on a Freemium pricing model. Selene 1 offers a Freemium pricing model. Supported billing and checkout platforms include: not listed.

### What are the best Selene 1 alternatives in 2026?
Based on OpenAITools.app category traffic and feature fit, the top five alternatives to Selene 1 are: 1. Future AGI (121.74K visits/mo); 2. Google AI Studio (112.62M visits/mo); 3. LangWatch (52.1K visits/mo); 4. Scale (616.92K visits/mo); 5. OrcaRouter (975.3K visits/mo).

### Which platforms and core AI capabilities does Selene 1 support?
Selene 1 is classified under AI API, Large Language Models (LLMs), AI Models, AI Testing, supports the following platforms: Website, and its core capability tags include: AI evaluation, LLM-as-a-Judge, Generative AI, Model evaluation, Prompt testing, AI quality.

## Alternatives

| Tool Name | Monthly Visits | Pricing Model | Compare |
| :--- | :--- | :--- | :--- |
| [Future AGI](https://openaitools.app/tool/future-agi) | 121,741 | Freemium, Usage-based | [Compare](https://openaitools.app/compare/future-agi-vs-selene-1) |
| [Google AI Studio](https://openaitools.app/tool/google-ai-studio) | 112,620,020 | Freemium | [Compare](https://openaitools.app/compare/google-ai-studio-vs-selene-1) |
| [LangWatch](https://openaitools.app/tool/langwatch) | 52,098 | Contact for Pricing | [Compare](https://openaitools.app/compare/langwatch-vs-selene-1) |
| [Scale](https://openaitools.app/tool/scale) | 616,915 | Contact for Pricing | [Compare](https://openaitools.app/compare/scale-vs-selene-1) |
| [OrcaRouter](https://openaitools.app/tool/orcarouter) | 975,300 | Freemium | [Compare](https://openaitools.app/compare/orcarouter-vs-selene-1) |
| [Portkey](https://openaitools.app/tool/portkey-ai) | 195,650 | Freemium, Paid, Contact for Pricing | [Compare](https://openaitools.app/compare/portkey-ai-vs-selene-1) |
| [LLM Gateway](https://openaitools.app/tool/llm-gateway) | 168,426 | Freemium, Contact for Pricing | [Compare](https://openaitools.app/compare/llm-gateway-vs-selene-1) |
| [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | Paid | [Compare](https://openaitools.app/compare/openai-vs-selene-1) |
| [Gemma Open Models by Google](https://openaitools.app/tool/gemma-open-models-by-google) | 4,900,914 | Freemium, Paid | [Compare](https://openaitools.app/compare/gemma-open-models-by-google-vs-selene-1) |
| [Maxim AI](https://openaitools.app/tool/maxim-ai) | 121,351 | Contact for Pricing, Free Open Source | [Compare](https://openaitools.app/compare/maxim-ai-vs-selene-1) |
| [RightNow Inference (RunInfra)](https://openaitools.app/tool/runinfra) | 18,110 | Free Trial, Paid, Contact for Pricing | [Compare](https://openaitools.app/compare/runinfra-vs-selene-1) |
| [Groq](https://openaitools.app/tool/groq) | 3,987,936 | Paid | [Compare](https://openaitools.app/compare/groq-vs-selene-1) |

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Source: https://openaitools.app/tool/selene-1