Below is a concise, curated list of leading AI and blockchain development studios worldwide — grouped by “AI product / research leaders” and “AI & blockchain development / services studios” so you can pick by whether you need foundational models, platform tooling, or an engineering partner to build your product.

Top AI product / research leaders (best for models, infrastructure, open-source tools)

• OpenAI — market-leading generative models, extensive APIs and platform integrations (good when you need state‑of‑the‑art LLMs and agent capabilities). (apnews.com)
• DeepMind (Google) — top-tier research and applied AI (strong in RL, reasoning, and scientific applications). (axios.com)
• Anthropic — safety-focused large‑model provider used by enterprises that need guardrails and controllable AI. (widely cited in industry comparisons) (axios.com)
• Hugging Face — open‑source model hub, MLOps tooling, model hosting and an active developer ecosystem (best if you want open weights, model fine‑tuning and deployment tooling). (en.wikipedia.org)
• CoreWeave (infrastructure) — specialist GPU/cloud provider for large‑scale training and inference (useful when you need custom GPU infrastructure or large compute capacity). (en.wikipedia.org)

Top blockchain development studios & platforms (best for dApps, smart contracts, infra and enterprise blockchain)

• ConsenSys — Ethereum/web3 infrastructure, MetaMask/Infura ecosystem and enterprise blockchain services (strong for Ethereum-native products and developer tools). (ConsenSys.io)
• Alchemy — leading developer platform / RPC + data APIs and tooling used by a large share of top dApps (excellent when you need reliable, scalable on‑chain infra). (alchemy.com)
• ChainSafe Systems — protocol‑agnostic, open‑source blockchain engineering (good for cross‑chain, client implementations, rollups and infrastructure). (chainsafe.io)
• LeewayHertz — full‑stack blockchain app and enterprise development (smart contracts, marketplaces, tokenization—suitable as an outsourced dev partner). (LeewayHertz.com)
• (For enterprise consulting & system integration) — Deloitte, Accenture and large consultancies still lead complex blockchain + AI integration projects for Fortune‑class clients (choose them for regulatory-heavy, multi‑stakeholder programs). (reuters.com)

How to choose the right studio (short checklist)

• Need a ready model / API? Pick OpenAI, Anthropic or Hugging Face. (apnews.com)
• Need large GPU/cloud for training or inference? Evaluate CoreWeave (or cloud GPU specialists). (en.wikipedia.org)
• Building an Ethereum/web3 product (wallets, dApp, rollup, NFT marketplace)? Start with ConsenSys or Alchemy for infra + ChainSafe or LeewayHertz for engineering. (ConsenSys.io)
• Enterprise program with compliance, audits, cross‑team delivery? Consider Deloitte/Accenture plus a specialized blockchain dev studio for implementation. (reuters.com)

If you’d like, I can:

• narrow this to studios that specialize in a specific sector (finance, healthcare, gaming, supply‑chain), or
• produce a short RFP template and vendor evaluation checklist (time, stack, security, IP, team size, cost) to help you compare 3–5 shortlisted vendors.

Which of those would be most helpful next?