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Horizon

Platform

by Labelbox

Horizon supplies RL training gyms and evaluations for reasoning, tool use and computer use, using WorldSim to simulate enterprise environments such as GitLab, Jira, CRM, email and chat and to produce calibrated reward and preference signals for post-training.

Find alternatives to Horizon

No Horizon-specific price published. The page's two CTAs are 'Start for free' (which links to the generic app.labelbox.com/signup for the labeling platform, not to Horizon) and 'Contact us'. Horizon is not on any pricing page: labelbox.com/pricing/ and labelbox.com/pricing/calculator/ both returned HTTP 404 on 2026-09-05 (the site was restructured; only /products/{recursion,horizon,terra,alignerr}/ remain in its sitemap).

What it does

• Model training
• Evaluation and observability
• Data labelling
• Agent orchestration

Sources

Pricing

Official documentation · 5 Sep 2026

Fetched. No prices, tiers or rates on the page.

Description

Official documentation · 5 Sep 2026

Fetched. H1 'Environments for post-training, at scale'; page calls it 'RL training gyms & evals for reasoning, tool use, and computer use' and names WorldSim and the enterprise apps it simulates.

Sold within

Live re-check 2026-09-15: the page never mentions Recursion, Terra or Alignerr as peers (contradicting the prior note) and reads as a feature within Labelbox's software rather than a clearly independent peer product, with no dedicated pricing or CTA for Horizon itself.

Also from Labelbox

• Recursion Agent platform

  Labelbox's reinforcement-learning platform for developing, evaluating and deploying enterprise specialist agents, connecting RL environments, evaluation systems and a training loop that fine-tunes models from graded rollout trajectories.

• Terra Data service

  Terra is Labelbox's robotics data product delivering video, trajectories and multimodal annotations across pre-training, post-training and evaluation stages, including expert teleoperation with action labels and multiple camera perspectives for embodied foundation models.

• Alignerr Data service

  Alignerr is Labelbox's expert-network product that routes AI training and evaluation tasks to credentialed contributors across 200+ knowledge domains and 40+ countries and returns structured outputs for RL training, RLHF and evaluation workflows.

• Catalog Application

  Catalog is Labelbox's data curation and search product providing out-of-the-box search across images, text, video, conversations and documents over metadata, vector embeddings and annotations without building your own vector database infrastructure.

• Annotate Application

  Annotate is the data labeling product within Labelbox, providing 10+ built-in editors for multimodal chat, LLM evaluation, prompt/response generation, computer vision and NLP, plus customizable labeling and review workflows and team performance monitoring.

• Labelbox Foundry Developer tool

  Foundry runs third-party foundation models over data already in Labelbox to pre-label and enrich image, text and document datasets without code, routing the predictions to human review; billed as inference cost per model run plus Labelbox Units.

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