LeoStars
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Web2 · Web3

Custom development, two stacks.

We ship marketing sites and product UIs in weeks, and audited smart contracts that don't get drained. One team, both worlds — pick the stack your problem actually needs.

Web2 · Off-chain

Sites that convert.

Multilingual marketing sites, product UIs and SEO-optimized content. Next.js + headless CMS, your team in the editor on day one.

Next.jsReactTypeScriptSanityPayloadTailwindVercelLighthouse 95+
Marketing sites

Conversion-focused marketing sites

Fast, multilingual marketing sites with content workflows your team can run. Built around the AI features behind them.

  • Next.js + headless CMS
  • Lighthouse 95+
  • EN / ES / CA from day one
Product UI

Product dashboards & SaaS UI

Internal tools, customer dashboards, admin panels. Clean component libraries, real auth, real metrics.

  • React + TanStack Query
  • Auth, RBAC, audit logs
  • Telemetry from day one
SEO & LLM-ready

SEO and LLM-optimized content

Schema markup, Open Graph, structured data, llms.txt and content that answers the questions your buyers actually ask.

  • Schema + JSON-LD
  • llms.txt + sitemap
  • Programmatic SEO when it fits
Web3 · On-chain

Smart contracts, audit-first.

Solidity for EVM chains. Tested with Hardhat + Foundry, audited before mainnet, deployed with anti-MEV protection. We do Web3 carefully, on purpose.

SolidityHardhatFoundryWagmiViemPrivyBaseArbitrumPolygon
Smart contracts

Smart contracts (Solidity / EVM)

Audited Solidity for Ethereum, Base, Arbitrum, Polygon. Hardhat + Foundry test suites. Audits via certified partners.

  • ERC-20 / 721 / 1155
  • Foundry + Hardhat
  • Audited before mainnet
On-chain payments

On-chain payments & subscriptions

Stablecoin checkout, recurring on-chain subscriptions, multi-currency invoicing — for SaaS and creator economies.

  • USDC / EURC checkout
  • Subscriptions on Base
  • Off-ramp via Stripe & Mercuryo
Wallet integrations

Wallet integrations & account abstraction

Connect Metamask, Rainbow, Phantom and Privy. Account abstraction for invisible onboarding — email-only signup, custody options.

  • WalletConnect v2
  • ERC-4337 smart accounts
  • Email-only onboarding (Privy)
Token launches

Token launches & tokenomics

Tokenomics modeling, vesting contracts, liquidity bootstrap, anti-bot launch design. Boring, careful, audit-first.

  • Vesting + cliff contracts
  • LBP / fair-launch design
  • Anti-MEV protection
dApps & NFT

dApps, NFT mints & marketplaces

Full-stack Web3 product UI — minting flows, marketplaces, on-chain dashboards. Built on Wagmi + Viem + Next.js.

  • Wagmi / Viem / Next.js
  • Open-edition + bonding curves
  • IPFS + Arweave storage
Tech we run on

One team, one stack, no surprises.

The tools we run in production for clients. We pick what your problem needs — not what's trending.

AI & Models
  • OpenAI
  • Anthropic
  • Llama
  • Mistral
  • Hugging Face
Web2 stack
  • Next.js
  • React
  • TypeScript
  • Tailwind
  • Sanity
  • Vercel
Workflow & data
  • n8n
  • Make
  • Supabase
  • PostgreSQL
  • Redis
  • Pinecone
Web3 stack
  • Solidity
  • Foundry
  • Hardhat
  • Wagmi
  • Viem
  • Privy
  • Base
Let's talk

20 minutes.
No deck. No demo.

Tell us about the workflow you'd automate first. We'll tell you whether it's worth it — even if the answer is no.

Book a 20-min call Or email hi@leostars.io
20-min discovery call
Andorra · UTC+1
MAR 2026
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Friday, 14 March
Confirm 10:30

LeoStars — AI agency in Andorra

LeoStars is an AI agency that builds AI agents, automations, internal copilots and custom software (Web2 and Web3) for companies in Europe and Latin America. Based in Andorra, working in English, Spanish and Catalan.

Services we ship

Clients

Ubisoft, Aleph.im, Aspectados.