How do their growth rates compare?

Labelbox has a month-over-month growth rate of -22.8%; Select Star has —.

How does pricing compare?

Labelbox: Contact for Pricing. Contact for pricing. Labelbox does not publish self-serve plans or public rate cards; its pricing route instead directs interested teams to talk to sales, and cost is shaped by data production scope, agent deployment and enterprise requirements. There is no published free tier. Prospective customers should request a quote based on their volumes and use cases. Select Star: Contact for Pricing. Quote-based enterprise pricing; Select Star does not publish public list prices. Cost depends on the scale of your environment — connected data sources, data volume, and the seats or capabilities you need — so evaluation typically starts with contacting sales. There is a free Chrome extension, and the SEO/AI discovery scoop of legacy listings should not be read as a price.

What are alternatives to Labelbox and Select Star?

Other tools in related categories include Duck.ai, Roboflow, Appen, Scale, SuperAnnotate.

Labelbox vs Select Star — Traffic (762.8K vs 0), Pricing & Verdict

Open AI Tools

Labelbox vs Select Star — Traffic (762.8K vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Labelbox	Select Star
Official Domain	labelbox.com	chromewebstore.google.com
Pricing Model	Contact for Pricing	Contact for Pricing
Monthly Visits	762.8K (762,803)	0 (0)
MoM Traffic Delta	-225.17K (-22.8%)	0 (—)
Primary Market & Share	🇺🇸 United States (21.9%)	🌐 Global (—)
Direct Visits / mo	370.02K	0
User Rating	4.4	4.4
Supported Platforms	Website	Browser Extension

Labelbox

The environments frontier AI trains on, and the agents that do the recurring work

Data labeling and expert annotation

Structured annotation, curation, model evaluation and human-in-the-loop review across vision, language and generative tasks, used to build the training and eval data behind production models.

Autonomous agent sessions

Recursion agents start on their own from builds, alerts, commits, checkpoints and schedules, then work in the background until the task is finished and reviewable.

Domain specialists by function

Specialist agents cover software engineering, reliability, security, ML research, evals, R&D, product and finance workflows, from flaky test fixes to postmortem drafts and vulnerability patches.

Graded outcomes that compound

Every agent run is scored by a grader, and graded sessions leave memories, notes and skills that the next session reads before acting, so quality compounds over time.

Strengths & Pros

+Covers both sides of the problem: training and eval data production plus agents that act on recurring work
+Backed by a recent $100M+ Series E and adoption by frontier AI labs, indicating real funding and demand
+Agent runs produce concrete deliverables with proof — tests, reruns, ablations — rather than unverified suggestions