AI-data services for vertical AI startups
Expert-graded AI data services.
Output, not surveillance.
Per-project SOWs from $30K. Senior raters with audited backgrounds. No screen capture, no biometric vaults, no Insightful-style surveillance.
Currently accepting projects in legal · medical · finance · sales verticals. Non-PHI, non-privileged.
The privacy promise
We grade output. Not contractors.
Maven Mark's quality assurance happens at the deliverable layer via peer review and rubric scoring. We do not surveil the people doing the work.
No screen capture
Deliverable-graded, not surveillance-graded. We never capture screens, keystrokes, or personal-app activity. Contractor privacy is policy, not preference.
Per-project PII compartmentalization
Your project, your data, your retention window. No centralized vault — segregated buckets per pilot, deletion windows defined in the SOW.
MFA-enforced + audited compliance
MFA on every contractor account from day one. Compliance posture via Vanta. We don't outsource to fraudulent vendors.
Service tiers
Three tiers. Match the rater to the rubric.
Blended hourly rates including platform fee. Final pricing locked in your SOW after a scoping call.
Vetted
$50/hr blended
Junior + mid raters on long-tail tasks. Throughput-optimized.
- —Pre-screened domain familiarity
- —Standard rubric grading
- —Anti-cheat scanning on every submission
Senior
Recommended$120/hr blended
Domain experts on critical rubric work and SFT-grade rewrites.
- —5+ years domain practice
- —Multi-rater quality with IRA reporting
- —Inline rubric authoring as part of work
Principal
$300/hr blended
Ex-AI-lab or ex-domain-leader for adjudication and corpus design.
- —Top-of-field credentials
- —Final adjudication on senior disagreements
- —Custom evaluation harness design
Most pilots blend two tiers. Pilot SOWs start at $30K; the typical first engagement lands between $50K and $120K. Monthly retainers from $25K + 35% platform markup.
How a pilot works
Four steps. First batch within two weeks.
Discovery call
30-minute conversation. We map your task family (preference pairs, rubric-graded eval, expert rewrite, executable benchmark), volume, vertical, and timing.
Scoped SOW
Within 5 business days you receive a fixed-bid SOW with deliverable count, contractor bench size, rubric draft, integration plan (S3 / webhook / REST / MCP), and pricing.
Bench assignment
We assign contractors from our vetted pool — Vetted, Senior, or Principal tier per the SOW. Bench-paid in advance so availability is real, not hypothetical.
Deliverable stream
Daily or weekly batches delivered via your preferred channel. Project status + IRA dashboard live throughout. Final corpus ships in your chosen format (HF DPO JSONL, OpenAI Evals YAML, Inspect AI, Argilla, SWE-bench, or custom).
What we deliver
Four task families. Every standard format.
No proprietary schema lock-in. We ship in whichever format your training pipeline already speaks.
RLHF / DPO
Preference pairs
Chosen / rejected response pairs for reward model training. Shipped in HuggingFace DPO JSONL standard — drop directly into TRL pipelines.
Capability evals
Rubric-graded evaluation
Multi-criterion scorecards on model outputs. Customer-authored or in-house authored rubrics. Met/Not-Met, 1-N rating, ranking, span highlighting.
SFT / Constitutional
Expert rewrites
Senior practitioners rewrite model outputs with rationale. Optionally net-new authored content for SFT corpora in specialized domains.
SWE-style — v1
Executable benchmark tasks
SWE-bench-compatible task instances with golden patches, F2P / P2P tests, and Docker-runnable environments. Available in v1 for software-engineering customers.
Integration: S3 batch dump (default), signed webhook on milestone, REST API for pull (v1), or MCP server endpoint for agentic consumers (v1).
The question we expect to be asked
"If your competitor was breached and centralized contractor PII is in the news — what makes Maven Mark different?"
We grade deliverables, not contractors. We never adopted personal-device screenshot capture, biometric centralization, or W-9 vaulting as a product strategy.
We compartmentalize PII per-project. We enforce MFA from day one. We retain only what the SOW says, for as long as it says.
Privacy and security aren't a sales talking point we adopted in April. They are how the product is shaped.
Request a pilot
Tell us about your project.
One founder reads every request personally. Discovery call within one business day.