Vendor Marketplace

The Marketplace for Vetted AI Data Labeling Providers

Skip the weeks of sourcing BPOs and agencies. Post one RFP and get standardized proposals from 50+ pre-vetted data labeling and LLM service providers.

Post an RFP Browse Providers

OpenTrain Post an RFP interface showing anonymous posting toggle and sample projects for segmentation, LLM evaluation, and document labeling with tool tags for V7, Argilla, and Label Studio.

OpenTrain proposals inbox showing 12 vendor responses with pricing, ratings, tools, and timelines for data labeling and LLM evaluation projects.

Post one RFP and receive standardized proposals from vetted data labeling and LLM service providers.

Post Anonymously

Vetted Providers

Standardized Proposals

Shortlist in Days

Provider Coverage

One Marketplace for LLM and Data Labeling Vendors

Whether you need an RLHF partner or an annotation team at scale, find agencies and BPOs for any AI data program in one place.

LLM programs: evaluation, preference data, SFT, red teaming, tool use, code QA

Structured labeling: image, video, LiDAR, documents, text, audio

Standardized proposals with pricing, capacity, timelines, and references

Post an RFP

Sourcing Workflow

Post Once, Reach Qualified Vendors

Describe your project once. We match you with vendors who fit your scope, tools, and requirements. They submit proposals, you compare and chat in one inbox.

Your RFP is routed to vendors matched by domain, language, tools, and capacity

Each vendor submits a standardized proposal with pricing, timeline, and references

Compare side-by-side and message vendors directly, all in one place

Post an RFP

OpenTrain sourcing workflow showing RFP scope, AI matching to qualified vendors by language and domain, and proposal comparison in one inbox.

OpenTrain anonymous RFP for LLM evaluation in 10 languages with private proposal review and vendor messaging.

Confidential Sourcing

Collect Proposals Anonymously

Your company name stays hidden until you decide to share it. Review vendor profiles, check references, and message providers without revealing who you are.

Receive proposals in a single inbox without exposing your identity

View vendor profiles with capabilities, past clients, and verified reviews

Message vendors directly and reveal your company only when you're ready

Post an RFP

Payments

Optional Secure Escrow Payments

Use OpenTrain escrow for milestone-based payments with built-in protection, or pay vendors directly off-platform. No fees, no lock-in.

Fund milestones by card or bank transfer and release only when work is approved

Built-in payment protection for both sides

Pay vendors off-platform anytime with zero penalties

Post an RFP

OpenTrain escrow for company to vendor projects in data labeling and LLM programs with milestone funding and release on approval.

Metrics

Skip the Vendor Search. Start Comparing Proposals.

Traditional vendor sourcing takes weeks of calls, demos, and scattered emails. OpenTrain gives you standardized proposals from qualified providers in one place so you can shortlist faster.

Pre-vetted providers in the network

50+

Data labeling and LLM service providers across domains, languages, and annotation tools.

Average proposals per RFP

Qualified vendors respond with standardized pricing, capacity, timelines, and references.

< 5 minutes

to create an account and post your first RFP

1 inbox

for every proposal, message, and vendor conversation

Flexible tooling

so vendors work in your annotation platform, not theirs

100% free

to post RFPs and receive proposals from vendors

Get Started

Find Your Next Data Labeling Partner in Days, Not Weeks

Post one RFP and get standardized proposals from 50+ pre-vetted data labeling and LLM providers. Compare pricing, capacity, and references in one inbox. 100% free to post.

Post an RFP Browse Providers