
Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.
Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.
FluidStack records 154,620 monthly visits with +7.3% month-over-month growth and Paid, Contact for Pricing pricing. Outlier AI records 10,372,036 monthly visits with +7.6% growth and Paid pricing.

Gigawatt-scale AI compute, built and operated end to end
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | fluidstack.io | outlier.ai |
| Pricing Model | Paid, Contact for Pricing | Paid |
| Monthly Visits | 154.62K (154,620) | 10.37M (10,372,036) |
| MoM Traffic Delta | +10.49K (+7.3%) | +736.51K (+7.6%) |
| Primary Market & Share | 🇺🇸 United States (95.7%) | 🇺🇸 United States (21.6%) |
| Direct Visits / mo | 47.87K | 5.82M |
| User Rating | 4.4 | 3.8 |
| Supported Platforms | Website | Website |

Gigawatt-scale AI compute, built and operated end to end
FluidStack designs and builds large AI data centers, including high-density campuses with significant per-site power capacity, rather than reselling capacity from other clouds.
Clusters are architected for large-scale model training and inference, with high-bandwidth interconnect and orchestration suitable for distributed workloads.
The company develops off-grid solar and recirculating closed-loop cooling, treating power and water efficiency as core engineering problems.
Smart hands, cluster provisioning and operations support let research teams focus on models while FluidStack runs the physical and orchestration layers.

Get paid to train the next generation of AI models
After skill screening, contributors are matched to projects that fit their domain, from coding and math to linguistics and medicine.
No minimum hours and fully remote work, so experts can fit tasks around study, research or a primary job.
Typical work includes writing hard prompts, producing grading rubrics, ranking competing answers and reviewing model reasoning.
Contributors are paid for approved work each week, with rewards that scale with the quality of their output.

Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.
Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.

SpecialistDelivers developer-first serverless endpoints optimized for generative media models rather than general-purpose infrastructure.
SpecialistDelivers developer-first serverless endpoints optimized for generative media models rather than general-purpose infrastructure.
Offers flexible on-demand GPU rentals and serverless endpoints, but lacks FluidStack's ultra-scale enterprise GPU clusters.
Offers flexible on-demand GPU rentals and serverless endpoints, but lacks FluidStack's ultra-scale enterprise GPU clusters.

Offers crowdsourced data collection and annotation services, operating on a broader task-based crowdsourcing model.
Offers crowdsourced data collection and annotation services, operating on a broader task-based crowdsourcing model.

SpecialistFocuses on optimized serverless inference APIs and managed model hosting rather than raw cluster rentals.
SpecialistFocuses on optimized serverless inference APIs and managed model hosting rather than raw cluster rentals.

Connects AI research labs with human subject matter experts for specialized evaluation and data annotation tasks.
Connects AI research labs with human subject matter experts for specialized evaluation and data annotation tasks.
Delivers peer-to-peer GPU rental marketplaces for lower-cost experimentation, though with less enterprise infrastructure predictability.
Delivers peer-to-peer GPU rental marketplaces for lower-cost experimentation, though with less enterprise infrastructure predictability.
SpecialistProvides serverless Python container execution for cloud jobs, but lacks raw multi-node cluster provisioning controls.
SpecialistProvides serverless Python container execution for cloud jobs, but lacks raw multi-node cluster provisioning controls.
Provides dedicated NVIDIA GPU clusters and managed cloud infrastructure, competing directly on enterprise-grade training workloads.
Provides dedicated NVIDIA GPU clusters and managed cloud infrastructure, competing directly on enterprise-grade training workloads.

Free / Open-sourceDistributed GPU cloud that orchestrates the world's idle consumer GPUs
Free / Open-sourceDistributed GPU cloud that orchestrates the world's idle consumer GPUs

SpecialistUtilizes proprietary wafer-scale processors for extreme training speeds, differing from standard NVIDIA GPU cluster setups.
SpecialistUtilizes proprietary wafer-scale processors for extreme training speeds, differing from standard NVIDIA GPU cluster setups.

Established enterprise data annotation provider offering large-scale human validation and alignment services for AI models.