Labelbox

Free plan APIWeb

What Labelbox is

Labelbox provides data annotation and services for AI training, reinforcement learning environments for AI labs, and Recursion, a platform for enterprises to run fleets of agents. Recursion work can begin from a schedule, alert, event, or API call. Agents can plan jobs, run specialist agents in parallel, use sandboxes, and return graded results with evidence to connected apps. Examples of those apps include Slack, GitHub, Linear, Salesforce, Databricks, Google Drive, Box, and Jira. Horizon supplies reinforcement learning environments and evaluations for frontier model post-training in reasoning, tool use, and computer use. Labelbox Annotate has more than 10 editors for multimodal chat, LLM evaluation, prompt and response generation, computer vision, and natural language processing. Expert labeling services cover RLHF, supervised fine-tuning, multimodal LLM evaluation, preference ranking, red teaming, and coding and AI agent tasks. Labelbox says its expert network covers more than 200 domains and more than 30 languages, with additional regional and domain-specific languages available on request. Catalog can connect data from more than 25 cloud sources or a customer’s own data solutions. Customers can keep assets in their own cloud storage and connect them using signed URLs or delegated access. Labelbox was founded in 2018 and is headquartered in San Francisco, California.

Who it suits

Labelbox suits AI labs and enterprises seeking reinforcement learning environments, training data services, or agent workflows across connected apps. Its annotation tools and expert services also serve teams working with multimodal data and model evaluation.

What it does well

Recursion jobs can start from schedules, alerts, events, or API calls.
Specialist agents can work in parallel and use sandboxes.
Horizon covers reasoning, tool use, and computer use.
Annotate offers more than 10 editors for varied data tasks.
Expert network spans more than 200 domains and 30 languages.
Customers can keep assets in their own cloud storage.

What to know first

The homepage directs enterprise and frontier AI customers to contact Labelbox for pricing.
The free tier has 10,000 Labelbox units before the card on file is charged.
Foundry is available to Starter and Enterprise plans.

Limits

The free tier includes 10,000 Labelbox units before the card on file is charged. Foundry is available to Starter and Enterprise plans, with eligible self-serve organizations paying usage-based LBU and model compute costs.

Getting started

Visit labelbox.com and choose the option to get started for free.
Use Labelbox on the web or through its API.
For Foundry, use a Starter or Enterprise plan and opt in if your self-serve organization is eligible.
Connect apps such as Slack, GitHub, Google Drive, or Jira for Recursion workflows.
Connect cloud assets using signed URLs or delegated access; AWS, Google Cloud, and Microsoft Azure storage are documented options.

Verdict

Choose Labelbox if you need AI training data services, reinforcement learning environments, or enterprise agent workflows connected to other apps. Teams assessing cost should contact the company for pricing; Foundry also requires a Starter or Enterprise plan and usage-based LBU and model compute costs.

Questions

Is Labelbox free?

Labelbox has a free plan. Free-tier organizations have 10,000 Labelbox units before the card on file is charged.

What platforms does Labelbox support?

The listed platforms are web and API.

What does Labelbox offer?

Its current offering includes reinforcement learning environments for AI labs and Recursion, a platform for enterprises to run fleets of agents. It also offers annotation tools, expert labeling services, and Horizon environments and evaluations.

Which apps can Recursion connect to?

Examples include Slack, GitHub, Linear, Salesforce, Databricks, Google Drive, Box, and Jira.

How is Foundry offered?

Foundry is available to Starter and Enterprise plans. Eligible self-serve organizations can opt in and pay usage-based LBU and model compute costs.

How does Labelbox handle customer data and security?

Customers can host assets in their own cloud storage and connect them with signed URLs or delegated access. Labelbox says hosted labeled data, metadata, and private user information are encrypted at rest with AES-256 and in transit with TLS 1.2 or later; it also states that it maintains SOC 2 Type II certification and HIPAA compliance.

Facts from Labelbox's own pages

Agent execution: Recursion can plan jobs, run specialist agents in parallel, use sandboxes, and deliver results into connected apps. · labelbox.com, 3 Oct 2026
API: The IAM integration documentation shows Python SDK examples using a Labelbox API key to create and manage integrations. · docs.labelbox.com, 4 Oct 2026
API triggers: The site lists API calls as one way to start recurring agent work. · labelbox.com, 3 Oct 2026
Cloud integrations: The IAM integration documentation provides delegated access setup for AWS, Google Cloud, and Microsoft Azure storage. · docs.labelbox.com, 4 Oct 2026
Cloud storage: Customers can keep assets in their own cloud storage and connect using signed URLs or delegated access; the security page says most customers choose to host assets themselves. · labelbox.com, 3 Oct 2026
Company: Labelbox says it was founded in 2018 and is headquartered in San Francisco. · labelbox.com, 4 Oct 2026
Compliance: Labelbox states that it maintains SOC 2 Type II certification and HIPAA compliance. · labelbox.com, 4 Oct 2026
Current offering: Labelbox says it builds RL training environments for leading AI labs and Recursion, a platform for enterprises to run fleets of agents. · labelbox.com, 3 Oct 2026
Customer-hosted assets: Customers can host assets on their own cloud platform and connect them using signed URLs or delegated access. · labelbox.com, 4 Oct 2026
Dataset sources: Catalog can integrate data from more than 25 cloud sources or a customer’s own data solutions. · docs.labelbox.com, 4 Oct 2026
Expert data: Labelbox says its Alignerr network provides expert judgments and training signals across more than 200 domains. · labelbox.com, 3 Oct 2026
Founded: 2018 · labelbox.com, 28 Sept 2026
Foundry availability: The guide says Foundry is available to Starter and Enterprise plans, with eligible self-serve organizations opting in and paying usage-based LBU and model compute costs. · labelbox.com, 3 Oct 2026
Free access: The Labelbox homepage invites visitors to get started for free. · labelbox.com, 4 Oct 2026
Free usage: A Labelbox guide says free tier organizations have 10,000 free Labelbox units (LBUs) before the card on file is charged. · labelbox.com, 3 Oct 2026
Headquarters: San Francisco, California, United States · labelbox.com, 28 Sept 2026
Horizon: Horizon provides RL environments and evaluations for frontier model post-training across reasoning, tool use, and computer use. · labelbox.com, 3 Oct 2026
Integrations: Examples of connected apps shown include Slack, GitHub, Linear, Salesforce, Databricks, Google Drive, Box, and Jira. · labelbox.com, 3 Oct 2026
Labeling: Labelbox Annotate supports more than 10 built-in editors for multimodal chat, LLM evaluation, prompt and response generation, computer vision, and natural language processing. · docs.labelbox.com, 4 Oct 2026
Labeling services: Labelbox offers expert labeling services for tasks including RLHF, supervised fine-tuning, multimodal LLM evaluation, preference ranking, red teaming, and coding and AI agent tasks. · docs.labelbox.com, 4 Oct 2026
Languages: Labelbox says its expert labeling service covers more than 30 languages, with additional regional and domain-specific languages available upon request. · docs.labelbox.com, 4 Oct 2026
Pricing availability: The current pricing URL returned a 404, and the opened current homepage directs enterprise and frontier AI customers to contact the company rather than listing prices. · labelbox.com, 3 Oct 2026
Product history: The company says it began in 2018 building tools for machine learning engineers and training data. · labelbox.com, 4 Oct 2026
Recursion workflows: Recursion agents can start from schedules, alerts, events, or API calls, work across apps, and return graded results with evidence. · labelbox.com, 3 Oct 2026