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Credits

The people, providers, and open-source tools that power Lexio.

Built by

Matvei

Eindhoven, Netherlands · matveylgnv2021@gmail.com · @mtvlgnv

AI models

Lexio routes your queries to one of three providers depending on the mode you pick:

OpenAI GPT-4o Mini powers Fast mode · openai.com

Google Gemini 2.5 Flash powers Balanced mode · ai.google.dev

Anthropic Claude Sonnet 4.5 powers Deep mode · anthropic.com

Open-source libraries

FastAPI Python web framework · fastapi.tiangolo.com

SQLAlchemy Database toolkit · sqlalchemy.org

Pydantic Data validation · pydantic.dev

slowapi Rate limiting · github.com/laurents/slowapi

passlib + python-jose Password hashing & JWT auth

html2canvas Screenshot rendering · html2canvas.hertzen.com

Typography

Lora Headings & wordmark · designed by Cyreal · Google Fonts

DM Sans Body text · designed by Colophon Foundry · Google Fonts

Infrastructure

Hetzner Cloud Hosting · hetzner.com

nginx Web server & reverse proxy

Let's Encrypt SSL certificates · letsencrypt.org

Stripe Payment processing · stripe.com

Sign-in providers

Google Identity Services Sign in with Google

Thanks

To everyone who has tried Lexio, reported a bug, suggested a feature, or just told a friend about it — thank you. A one-person project lives or dies on word of mouth.