Sapien
Sapien provides an open infrastructure called Proof of Quality (PoQ) that adds verifiable, onchain attestations to AI pipelines so teams can prove who made quality judgments, how they were reached, and consume trusted quality signals for training, evaluation, and production.
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Best for: Research
What it does
Research software for decision-makers comparing workflow fit and alternatives.
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Sapien
Sapien's Proof of Quality (PoQ) is an open infrastructure designed to add a trust layer to AI pipelines by producing verifiable quality signals and writing attestations onchain. It enables organizations to define what 'quality' means for a task (via a Task Definition Spec), register tasks onchain for contributors to evaluate or label data, and produce stake-weighted consensus and attestations that record who contributed, who validated, and what consensus was reached. Sapien is aimed at builders of AI systems, model evaluators, data teams, and safety-critical production systems that need provable provenance and verifiable judgments.
PoQ focuses on four core ideas: (1) define quality clearly, (2) get independent consensus through staking and validator processes, (3) record attestations onchain so provenance is immutable, and (4) allow consumer systems to fetch and trust the resulting quality signals without exposing raw data. Typical applications include validating training data, preference data for fine-tuning, evaluation gating, and real-time verification of production decisions.
Sapien provides an open infrastructure called Proof of Quality (PoQ) that adds verifiable, onchain attestations to AI pipelines so teams can prove who made quality judgments, how they were reached, and consume trusted quality signals for training, evaluation, and production.
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Claim this listingKey Features
Task Definition Spec (TDS)
Create a formal Task Definition Spec that defines what 'good' looks like for any evaluation, labeling, or validation task.
Onchain Task Registration
Register tasks onchain to open them for contributors and validators, creating an immutable record of the task and its parameters.
Contributor Staking & Commit-Reveal Validation
Contributors and validators stake to participate. Validators review submissions using a commit-reveal process; stake-weighted consensus determines acceptance and economic rewards/slashes.
Onchain Attestations
When consensus is reached, an attestation is written onchain capturing who created and validated the output and what consensus was achieved.
Immutable Provenance & Neutral Settlement
Attestations provide immutable provenance data and neutral settlement of quality signals that downstream systems can trust.
Privacy-preserving Architecture
Raw data remains within a user's systems; only the attestation metadata (who, how, consensus) is published onchain.
Real-time Verification for Production
Support for adding verifiable quality gates to production workflows and safety-critical decision paths.
Pricing
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Use Cases
Training Data
Register and validate labeled data onchain so training sets carry verifiable provenance and quality attestations.
Fine-Tuning & Preference Data
Validate preference or fine-tuning data at the source to ensure trustworthy signals are used when adapting models.
Evaluation Pipelines
Add verifiable quality gates to model evaluation pipelines so reported metrics and evaluations are backed by consensus-based attestations.
Production Safety & Real-time Decisions
Provide real-time verification of decisions and actions in safety-critical systems by consuming onchain attestations about the underlying judgments.
Integrations
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Benefits
Limitations
Frequently Asked Questions
What is Proof of Quality (PoQ)?
Does my raw data get published onchain?
How does consensus and staking work?
What parts of the AI lifecycle can Sapien be used for?
Getting Started
- 1 Join the waitlist or request early access using the site's 'Join the waitlist' form.
- 2 Define a Task Definition Spec (TDS) that describes what 'good' means for your task.
- 3 Register the task onchain, submit data or open it for contributors, and consume attestations produced after consensus.
Support
Docs
Public documentation is referenced on the site ('Read the Docs') for developers and implementers; access via the site's Docs link.
Waitlist / Early Access
Join the waitlist through the site's form to request early access and updates.
Contact
The site includes a 'Contact' link for inquiries (no explicit email address provided on the page).
API
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