Labelbox funding, valuation and investors

Overview

Labelbox provides a training-data platform where ML teams label, curate, and manage datasets for supervised learning, computer vision, and LLM fine-tuning. The company raised a $25M Series B in February 2020 led by Andreessen Horowitz and a $40M Series C in February 2021 led by B Capital Group, with First Round and Kleiner Perkins participating.

Why Labelbox is interesting

Labelbox sits under every supervised ML stack — data quality remains the bottleneck even in the LLM era where human feedback loops matter as much as pre-training data.

Product & use cases

Labelbox combines data labeling workflows, quality management, model-assisted labeling, and evaluation tools — supporting image, text, video, and LLM RLHF annotation at scale.

• Computer vision dataset labeling for autonomous systems
• LLM fine-tuning and RLHF human feedback collection
• Model evaluation and error analysis on labeled datasets
• Active learning pipelines to prioritize labeling spend

Key facts

• Series C (Feb 2021): $40M led by B Capital — Labelbox press
• Series B (Feb 2020): $25M led by a16z — Labelbox press
• Training data platform for ML and LLM fine-tuning

Funding history (newest first)

Investors in our directory

Funds linked from Labelbox's profile — open a fund page for stage focus and related deal articles.

Competitive landscape

Edge: Enterprise-grade labeling ops with model-assisted acceleration — reduces cost per label vs. pure manual annotation.

Data labeling commoditized at the low end but remains critical for high-quality ML. Labelbox competes with Scale AI's scale and vertical integration. LLM era shifted demand toward RLHF and evaluation, not just image boxes.

• Scale AI direct

  Dominant data labeling vendor with government and enterprise contracts.

• Snorkel AI adjacent

  Programmatic labeling vs. human annotation focus.

• SuperAnnotate direct

  Computer vision labeling platform.

• Hive / Appen adjacent

  Crowd labeling services.

Notable stories

• Labelbox raised Series B and C in consecutive Februarys (2020, 2021) — riding the computer vision labeling wave before pivoting tooling toward LLM RLHF.

Industries