Vast.ai is a GPU marketplace that connects renters with GPU owners, offering some of the lowest prices in the market through a decentralized supply model. Founded in 2018, Vast.ai focuses on cost efficiency through a bidding system.
Both VoltageGPU and Vast.ai leverage decentralized GPU supply for competitive pricing. VoltageGPU differentiates with 140+ preloaded AI models, an OpenAI-compatible API, and consistent pricing without the variability of a marketplace bidding system.
| Feature | VoltageGPU | Vast.ai |
|---|---|---|
| GPU Selection | RTX 4090, A100, H100+ | Wide range (marketplace) |
| Pricing Model | Fixed per-second billing | Marketplace bidding + fixed |
| API Access | REST API + OpenAI-compatible | REST API |
| OpenAI Compatibility | Yes — drop-in replacement | No |
| Billing Granularity | Per-second | Per-hour |
| Minimum Commitment | None | None |
| Setup Time | < 60 seconds | 2-10 minutes |
| Preloaded AI Models | 140+ models ready to use | Templates only |
| Regions | US, EU | Global (marketplace) |
| Free Credits | $5 for new users | None |
| Crypto Payments | Bitcoin accepted | Crypto accepted |
| CLI Tool | Yes | Yes (vastai CLI) |
On-demand pricing. Prices may vary. Last updated 2025.
| GPU Model | VoltageGPU | Vast.ai | Savings |
|---|---|---|---|
| RTX 4090 24GB | $0.39/hr | $0.37/hr | Competitor lower |
| A100 80GB | $3.76/hr | $1.50/hr | Competitor lower |
| H100 80GB | $6.62/hr | $3.10/hr | Competitor lower |
Vast.ai pricing based on publicly listed on-demand rates. VoltageGPU pricing reflects current listed rates. Actual pricing may vary.
140+ AI models preloaded — no need to find, download, and configure models yourself
OpenAI-compatible API for seamless integration with existing applications
Predictable fixed pricing vs. Vast.ai marketplace price fluctuations
Per-second billing saves money on short inference tasks compared to per-hour billing
Curated, reliable GPU infrastructure vs. variable quality from marketplace hosts
Migrating to VoltageGPU is straightforward. Follow these steps to get started.
Create a VoltageGPU account and get $5 free credit instantly
Choose from 140+ preloaded models or deploy a GPU pod
Update API endpoints in your code to VoltageGPU's OpenAI-compatible URL
No need to bid or search for GPU offers — pricing is transparent and fixed
Start with per-second billing for maximum cost efficiency
Vast.ai's marketplace model can offer very low prices, especially for interruptible or off-peak workloads. RTX 4090 pricing is comparable: VoltageGPU at $0.39/hr vs Vast.ai from $0.37/hr. For A100 and H100, Vast.ai's marketplace prices are currently lower. However, VoltageGPU's per-second billing can save significant money on short tasks, and the preloaded AI models eliminate the engineering time needed to set up models on Vast.ai.
VoltageGPU runs on curated infrastructure with consistent performance. Vast.ai's marketplace includes a wide range of hosts with varying reliability, internet speeds, and hardware conditions. For production workloads requiring consistent uptime, VoltageGPU offers a more predictable experience.
Vast.ai offers a broader range of GPUs through its marketplace, including older consumer cards. VoltageGPU focuses on high-performance GPUs (RTX 4090, A100, H100) optimized for AI workloads. Both platforms regularly expand their offerings.
Yes, VoltageGPU GPU pods support custom Docker containers, similar to Vast.ai. Additionally, VoltageGPU provides 140+ preloaded models accessible via API, which means many users do not need to host their own models at all.
Rent NVIDIA RTX 4090 with 24GB VRAM starting at $0.39/hour.
Enterprise-grade A100 80GB for large-scale AI workloads.
Latest generation H100 for cutting-edge AI research and training.
Browse 140+ AI models with OpenAI-compatible API access.
Serverless AI inference with per-token billing and instant scaling.
Transparent pricing with per-second billing and no hidden fees.
Get $5 free credit. Deploy a GPU pod or access 140+ AI models in under 60 seconds. No credit card required.